Science.gov

Sample records for sps h8 beamline

  1. Hutch for CSX Beamlines

    SciTech Connect

    Ed Haas

    2012-12-12

    NSLS-II will produce x-rays 10,000 times brighter than NSLS. To keep people safe from intense x-rays in the new facility, special enclosures, called hutches, will surround particular sections of beamlines.

  2. Hutch for CSX Beamlines

    ScienceCinema

    Ed Haas

    2016-07-12

    NSLS-II will produce x-rays 10,000 times brighter than NSLS. To keep people safe from intense x-rays in the new facility, special enclosures, called hutches, will surround particular sections of beamlines.

  3. G4beamline

    SciTech Connect

    2011-05-24

    G4beamline is a single-particle-tracking simulation code based on the Geant4 toolkit. It is specifically optimized for the realistic evaluation of beam lines. It is especially useful for evaluating future muon facilities.

  4. Satellite Power System (SPS)

    NASA Technical Reports Server (NTRS)

    Edler, H. G.

    1978-01-01

    Potential organizational options for a solar power satellite system (SPS) were investigated. Selection and evaluation criteria were determined to include timeliness, reliability, and adequacy to contribute meaningfully to the U.S. supply; political feasibility (both national and international); and cost effectiveness (including environmental and other external costs). Based on these criteria, four organizational alternatives appeared to offer reasonable promise as potential options for SPS. A large number of key issues emerged as being factors which would influence the final selection process. Among these issues were a variety having to do with international law, international institutions, environmental controls, economics, operational flexibility, congressional policies, commercial-vs-governmental ownership, national dedication, and national and operational stategic issues.

  5. SSRF Beamline Control System

    SciTech Connect

    Zheng, L. F.; Liu, P.; Zhang, Z. H.; Hu, C.; Mi, Q. R.; Wu, Y. F.; Gong, P. R.; Zhu, Z. X.; Li, Z.

    2010-06-23

    There are seven beamlines in the Phase-I of SSRF. Five of them are equipped with Insertion Devices, while two with Bending Magnets. The beamline control system is based on the standard hardware and software architecture. The VME(PowerPC) with VxWorks is used for motion control, while the personal computers with Scientific Linux are the front end controllers of equipment protection and personnel safety systems. The control software is developed under EPICS which makes various experimental programs of Blu-Ice, LabView, VC and SPEC conveniently access Monochromators, mirror chambers and other optical components.

  6. SPS antenna pointing control

    NASA Technical Reports Server (NTRS)

    Hung, J. C.

    1980-01-01

    The pointing control of a microwave antenna of the Satellite Power System was investigated emphasizing: (1) the SPS antenna pointing error sensing method; (2) a rigid body pointing control design; and (3) approaches for modeling the flexible body characteristics of the solar collector. Accuracy requirements for the antenna pointing control consist of a mechanical pointing control accuracy of three arc-minutes and an electronic phased array pointing accuracy of three arc-seconds. Results based on the factors considered in current analysis, show that the three arc-minute overall pointing control accuracy can be achieved in practice.

  7. Optimized IR synchrotron beamline design.

    PubMed

    Moreno, Thierry

    2015-09-01

    Synchrotron infrared beamlines are powerful tools on which to perform spectroscopy on microscopic length scales but require working with large bending-magnet source apertures in order to provide intense photon beams to the experiments. Many infrared beamlines use a single toroidal-shaped mirror to focus the source emission which generates, for large apertures, beams with significant geometrical aberrations resulting from the shape of the source and the beamline optics. In this paper, an optical layout optimized for synchrotron infrared beamlines, that removes almost totally the geometrical aberrations of the source, is presented and analyzed. This layout is already operational on the IR beamline of the Brazilian synchrotron. An infrared beamline design based on a SOLEIL bending-magnet source is given as an example, which could be useful for future IR beamline improvements at this facility.

  8. Secure network for beamline control

    NASA Astrophysics Data System (ADS)

    Ohata, T.; Fukui, T.; Ishii, M.; Furukawa, Y.; Nakatani, T.; Matsushita, T.; Takeuchi, M.; Tanaka, R.; Ishikawa, T.

    2001-07-01

    In SPring-8, beamline control system is constructed with a highly available distributed network system. The socket based communication protocol is used for the beamline control mainly. Beamline users can control the equipment by sending simple control commands to a server process, which is running on a beamline-managing computer (Ohata et al., SPring-8 beamline control system, ICALEPCS'99, Trieste, Italy, 1999). At the beginning the network was based on the shared topology at all beamlines. Consequently, it has a risk for misapplication of the user's program to access different machines on the network system cross over beamlines. It is serious problem for the SPring-8 beamline control system, because all beamlines controlled with unified software interfaces. We introduced the switching technology and the firewalls to support network access control. Also the virtual networking (VLAN: IEEE 802.1Q) and the gigabit Ethernet technology (IEEE 802.3ab) are introduced. Thus the network security and the reliability are guaranteed at the higher level in SPring-8 beamline.

  9. SPS salvage and disposal alternatives

    NASA Technical Reports Server (NTRS)

    1980-01-01

    A wide range of salvage options exist for the satellite power system (SPS) satellite, ranging from use in and beyond geosynchronous orbit to use in low Earth orbit to return and use on Earth. The satellite might be used intact to provide for various purposes, it might be cannibalized, or it might be melted down to supply materials for space- or ground-based products. The use of SPS beyond its nominal lifetime provides value that can be deducted from the SPS capital investment cost. It is shown that the present value of the salvage value of the SPS satellites, referenced to the system initial operation data, is likely to be on the order of five to ten percent of its on-orbit capital cost. (Given a 30 year satellite lifetime and a four percent discount rate, the theoretical maximum salvage value is 30.8 percent of the initial capital cost). The SPS demonstration satellite is available some 30 years earlier than the first full-scale SPS satellite and has a likely salvage value on the order of 80 percent of its on site capital cost. In the event that it becomes desirable to dispose of either the demonstration or full-scale SPS satellite, a number of disposal options appear to exist for which intact disposal costs are less than one percent of capital costs.

  10. Technology alternatives for the SPS

    NASA Technical Reports Server (NTRS)

    Glaser, P.; Chapman, P. K.

    1980-01-01

    Emerging technologies may offer advantages over those selected for the reference design adopted for the SPS. While it is not possible to list all the technological innovations that may affect the SPS, it is feasible to develop a systematic methodology for assessing technical alternatives. This may be of value in evaluating proposed technologies and identifying high priority areas for research. Such a methodology includes involves (1) variation of guidelines; (2) analysis of system functions; (3) analysis of system sensitivity; (4) analysis of technology status and risk; and (5) external costs, problem areas, and criticisms of the SPS concept. The methodology is a first step towards the creation of a formal decision analytic framework which can support design choices and program decisions as development proceeds.

  11. Radiation protection of a proton beamline at ELI-Beamlines

    NASA Astrophysics Data System (ADS)

    Bechet, S.; Versaci, R.; Rollet, S.; Olsovcova, V.; Fajstavr, A.; Zakova, M.; Margarone, D.

    2016-12-01

    ELI-Beamlines (ELI stands for Extreme Light Infrastructure) is a new EU funded laser facility located near Prague, in Czech Republic. It will use laser-driven plasma sources to accelerate particles and host a dedicated proton beamline called ELIMAIA (ELI Multidisciplinary Applications of laser- Ion Acceleration) designed to reach energies up to 250 MeV. This beamline could be exploited to study possible future medical application of laser-driven beams. The first part of this paper introduces the beamline, the corresponding source terms and the complete set-up. The second part of the paper details the evaluation of the ambient dose equivalent and the activation study inside the experimental halls based on Monte-Carlo simulation. These calculations show that the ELIMAIA operation is safe as long as nobody is present in the hall when the beam is on.

  12. Investigations of SPS Orbit Drifts

    SciTech Connect

    Drøsdal, Lene; Bracco, Chiara; Cornelis, Karel; Goddard, Brennan; Kain, Verena; Meddahi, Malika; Wenninger, Jorg; Gianfelice-Wendt, Eliana

    2014-07-01

    The LHC is filled from the last pre-injector, the Super Proton Synchrotron (SPS), via two 3 km long transfer lines, TI 2 and TI 8. Over the LHC injection processes, a drift of the beam trajectories has been observed in TI 2 and TI 8, requiring regular correction of the trajectories, in order to ensure clean injection into the LHC. Investigations of the trajectory variations in the transfer lines showed that the main source of short term trajectory drifts are current variations of the SPS extraction septa (MSE). The stability of the power converters has been improved, but the variations are still present and further improvements are being investigated. The stability over a longer period of time cannot be explained by this source alone. The analysis of trajectory variations shows that there are also slow variations in the SPS closed orbit at extraction. A set of SPS orbit measurements has been saved and analysed. These observations will be used together with simulations and observed field errors to locate the second source of variations.

  13. Satellite Power System (SPS) military implications

    NASA Technical Reports Server (NTRS)

    Bain, C. N.

    1978-01-01

    The military implications of the reference satellite power system (SPS) were examined is well as important military related study tasks. Primary areas of investigation were the potential of the SPS as a weapon, for supporting U.S. military preparedness, and for affecting international relations. In addition, the SPS's relative vulnerability to overt military action, terrorist attacks, and sabotage was considered.

  14. Satellite power systems (SPS) concept definition study. Volume 7: SPS program plan and economic analysis, appendixes

    NASA Technical Reports Server (NTRS)

    Hanley, G.

    1978-01-01

    Three appendixes in support of Volume 7 are contained in this document. The three appendixes are: (1) Satellite Power System Work Breakdown Structure Dictionary; (2) SPS cost Estimating Relationships; and (3) Financial and Operational Concept. Other volumes of the final report that provide additional detail are: Executive Summary; SPS Systems Requirements; SPS Concept Evolution; SPS Point Design Definition; Transportation and Operations Analysis; and SPS Technology Requirements and Verification.

  15. Satellite Power Systems (SPS) concept definition study. Volume 6: SPS technology requirements and verification

    NASA Technical Reports Server (NTRS)

    Hanley, G.

    1978-01-01

    Volume 6 of the SPS Concept Definition Study is presented and also incorporates results of NASA/MSFC in-house effort. This volume includes a supporting research and technology summary. Other volumes of the final report that provide additional detail are as follows: (1) Executive Summary; (2) SPS System Requirements; (3) SPS Concept Evolution; (4) SPS Point Design Definition; (5) Transportation and Operations Analysis; and Volume 7, SPS Program Plan and Economic Analysis.

  16. SPring-8 Structural Biology Beamlines / Automatic Beamline Operation at RIKEN Structural Genomics Beamlines

    SciTech Connect

    Ueno, Go; Hasegawa, Kazuya; Okazaki, Nobuo; Sakai, Hisanobu; Kumasaka, Takashi; Yamamoto, Masaki

    2007-01-19

    RIKEN Structural Genomics Beamlines (BL26B1 and BL26B2) at SPring-8 have been constructed for high throughput protein crystallography. The beamline operation is automated cooperating with the sample changer robot. The operation software provides a centralized control utilizing the client and server architecture. The sample management system with the networked database has been implemented to accept dry-shipped crystals from distant users.

  17. CRAB Cavity in CERN SPS

    SciTech Connect

    Kim, H.J.; Sen, T.; /Fermilab

    2010-05-01

    Beam collisions with a crossing angle at the interaction point are often necessary in colliders to reduce the effects of parasitic collisions which induce emittance growth and decrease beam lifetime. The crossing angle reduces the geometrical overlap of the beams and hence the luminosity. Crab cavity offer a promising way to compensate the crossing angle and to realize effective head-on collisions. Moreover, the crab crossing mitigates the synchro-betatron resonances due to the crossing angle. A crab cavity experiment in SPS is proposed as a proof of principle before deciding on a full crab-cavity implementation in the LHC. In this paper, we investigate the effects of a single crab cavity on beam dynamics in the SPS and life time.

  18. European Sail Tower SPS concept

    NASA Astrophysics Data System (ADS)

    Seboldt, W.; Klimke, M.; Leipold, M.; Hanowski, N.

    2001-03-01

    Based on a DLR-study in 1998/99 on behalf of ESA/ESTEC called "System Concepts, Architectures and Technologies for Space Exploration and Utilization (SE&U)" a new design for an Earth-orbiting Solar Power Satellite (SPS) has been developed. The design is called "European Sail Tower SPS" and consists mainly of deployable sail-like structures derived from the ongoing DLR/ESA solar sail technology development activity. Such a SPS satellite features an extremely light-weight and large tower-like orbital system and could supply Europe with significant amounts of electrical power generated by photovoltaic cells and subsequently transmitted to Earth via microwaves. In order to build up the sail tower, 60 units - each consisting of a pair of square-shaped sails - are moved from LEO to GEO with electric propulsion and successively assembled in GEO robotically on a central strut. Each single sail has dimensions of 150m × 150 m and is automatically deployed, using four diagonal light-weight carbon fiber (CFRP) booms which are initially rolled up on a central hub. The electric thrusters for the transport to GEO could also be used for orbit and attitude control of the assembled tower which has a total length of about 15 km and would be mainly gravity gradient stabilized. Employing thin film solar cell technology, each sail is used as a solar array and produces an electric power in orbit of about 3.7 MW e. A microwave antenna with a diameter of 1 km transmits the power to a 10 km rectenna on the ground. The total mass of this 450 MW SPS is about 2100 tons. First estimates indicate that the costs for one kWh delivered in this way could compete with present day energy costs, if launch costs would decrease by two orders of magnitude. Furthermore, mass production and large numbers of installed SPS systems must be assumed in order to lower significantly the production costs and to reduce the influence of the expensive technology development. The paper presents the technical concept

  19. SLC nomenclature for beamline components

    SciTech Connect

    Paterson, J.; Silva, J.

    1984-07-12

    The purpose of this report is to document the SLC nomenclature conventions for beamline components. Included are recent enhancements which should lead to a more consistant usage of the ''unit number'' part of beamline device names. The attached pages are divided into three sections. The first section is a brief summary for the general user. The second section is a more amplified description for those who need more detailed interpretations of device names. The third section contains a few notes for those who must generate device names for new components.

  20. Satellite Power Systems (SPS). LSST systems and integration task for SPS flight test article

    NASA Technical Reports Server (NTRS)

    Greenberg, H. S.

    1981-01-01

    This research activity emphasizes the systems definition and resulting structural requirements for the primary structure of two potential SPS large space structure test articles. These test articles represent potential steps in the SPS research and technology development.

  1. Application of Microfocussing at a Nonspecific Beamline

    SciTech Connect

    Struth, B.; Snigirev, A.; Konovalov, O.; Otten, A.; Gauggel, R.; Pfohl, T.

    2004-05-12

    We report on the application of microfocussing on a non specific beamline. The ID10B beamline at the ESRF was originally designed for surface diffraction experiments. A special Fresnel phase zone plate opens a new field of wide scientific interest to the beamline.

  2. Satellite Power System (SPS) societal assessment

    NASA Technical Reports Server (NTRS)

    1980-01-01

    Construction and operation of a 60-unit (300 GW) domestic SPS over the period 2000 to 2030 would stress many segments of U.S. society. A significant commitment of resources (land, energy, materials) would be required, and a substantial proportion of them would have to be committed prior to the production of any SPS electricity. Forty-four concerns about the SPS were identified via a public outreach experiment involving 9000 individuals from three special interest organizations. The concerns focused on environmental impacts (particularly the effects of microwave radiation) and the centralizing tendency of the SPS on society.

  3. Satellite Power System (SPS) societal assessment

    NASA Astrophysics Data System (ADS)

    1980-12-01

    Construction and operation of a 60-unit (300 GW) domestic SPS over the period 2000 to 2030 would stress many segments of U.S. society. A significant commitment of resources (land, energy, materials) would be required, and a substantial proportion of them would have to be committed prior to the production of any SPS electricity. Forty-four concerns about the SPS were identified via a public outreach experiment involving 9000 individuals from three special interest organizations. The concerns focused on environmental impacts (particularly the effects of microwave radiation) and the centralizing tendency of the SPS on society.

  4. Satellite Power Systems (SPS) concept definition study. Volume 7: SPS program plan and economic analysis

    NASA Technical Reports Server (NTRS)

    Hanley, G.

    1978-01-01

    The economic and programmatic requirements for a recommended SPS solar photovoltaic baseline concept were analyzed. Costs are determined for the DDT&E; initial capital investment (covers initial procurement and emplacement of each SPS plant and equipment); replacement capital investment (capital asset replacement over the SPS operating life); operations and maintenance (expendables, minor maintenance, repair crews); and taxes/insurance.

  5. Satellite Power System (SPS) antenna pointing control

    NASA Technical Reports Server (NTRS)

    1980-01-01

    Accuracy requirements for the SPS antenna pointing control consists of a mechanical pointing accuracy of three arc minutes and an electronic phased array pointing accuracy of three arc seconds. Results of this study, based on the factors considered in current analysis, show that the three arc minute overall pointing control accuracy can be achieved for the SPS in practice.

  6. Satellite power system (SPS) public outreach experiment

    SciTech Connect

    McNeal, S.R.

    1980-12-01

    To improve the results of the Satellite Power System (SPS) Concept Development and Evaluation Program, an outreach experiment was conducted. Three public interest groups participated: the L-5 Society (L-5), Citizen's Energy Project (CEP), and the Forum for the Advancement of Students in Science and Technology (FASST). Each group disseminated summary information about SPS to approximately 3000 constituents with a request for feedback on the SPS concept. The objectives of the outreach were to (1) determine the areas of major concern relative to the SPS concept, and (2) gain experience with an outreach process for use in future public involvement. Due to the combined efforts of all three groups, 9200 individuals/organizations received information about the SPS concept. Over 1500 receipients of this information provided feedback. The response to the outreach effort was positive for all three groups, suggesting that the effort extended by the SPS Project Division to encourage an information exchange with the public was well received. The general response to the SPS differed with each group. The L-5 position is very much in favor of SPS; CEP is very much opposed and FASST is relatively neutral. The responses are analyzed, and from the responses some questions and answers about the satellite power system are presented in the appendix. (WHK)

  7. SPS flexible system control assessment analysis

    NASA Technical Reports Server (NTRS)

    Balas, M. J.

    1981-01-01

    Active control of the Satellite Power System (SPS0, a large mechanically flexible aerospace structure is addressed. The control algorithm is the principle component in the feedback link from sensors to actuators. An analysis of the interaction of the SPS structure and its active control system is presented.

  8. SPS issues: The need to look ahead

    NASA Technical Reports Server (NTRS)

    Dybdal, K. K.

    1980-01-01

    The need for a systemic examination of SPS for the purpose of identifying potential problem areas and the issues related to those areas, is considered. The use of a systemic approach, a valuable perspective from which to evaluate SPS implementation as a reliable, safe, and cost efficient energy supply of the future, is discussed.

  9. Specific SPS construction studies: Operations and maintenance

    NASA Technical Reports Server (NTRS)

    Miller, K. H.

    1980-01-01

    Surface as well as in-space operations of the solar power satellite program are addressed. The primary end products of SPS industrial enterprise are shown SPS and its ground receiving antenna every six months; and (3) construction of electric cargo orbital transfer vehicles. The production of photovoltaic cells and solar blankets is also considered.

  10. ALS beamline design requirements: A guide for beamline designers

    SciTech Connect

    1996-06-01

    This manual is written as a guide for researchers in designing beamlines and endstations acceptable for use at the ALS. It contains guidelines and policies related to personnel safety and equipment and vacuum protection. All equipment and procedures must ultimately satisfy the safety requirements set aside in the Lawrence Berkeley National Laboratory (LBNL) Health and Safety Manual (PUB-3000) which is available from the ALS User Office or on the World WideWeb from the LBNL Homepage (http:// www.lbl.gov).

  11. Integration of SPS with utility system networks

    NASA Technical Reports Server (NTRS)

    Kaupang, B. M.

    1980-01-01

    The integration of Satellite Power System (SPS) power in electric utility power systems is discussed. Specifically, the nature of the power output variations from the spacecraft to the rectenna, the operational characteristics of the rectenna power, and the impacts on the electric utility system from utilizing SPS power to serve part of the system load are treated. It is concluded that if RF beam control is an acceptable method for power control, and that the site distribution of SPS rectennas do not cause a very high local penetration (40 to 50%), SPS may be integrated into electric utility system with a few negative impacts. Increased regulating duty on the conventional generation, and a potential impact on system reliability for SPS penetration in excess of about 25% appear to be two areas of concern.

  12. Microwave Power Transmission Technologies for SPS

    NASA Astrophysics Data System (ADS)

    Shinohara, Naoki; Hashimoto, Kozo

    This paper describes the wireless power transmission via microwave (MPT) system for the Space Solar Power Station/Satellite (SPS). The SPS will be hugest space system and we need high efficient, huge, high accurate, light weight and inexpensive phased array for the SPS. Now we do not have any commercial MPT system on ground. Therefore, we have to consider the roadmap of the MPT system from the ground application to the SPS. We propose three step application of the MPT as follows
    1st Step: Weak Power Wireless Power Transmission (Ubiquitous Power Source, RF-ID, Energy Harvesting) under Present Radio Wave Configuration or High Power Wireless Power Transmission in Closed Area
    2nd Step: High Power Wireless Power Transmission to/from Moving Target/Source with Phased Array under New Radio Wave Configuration (Special Frequency for WPT) on Ground
    3rd (Final) Step: Wireless Power Transmission in Space (SPS)

  13. The LUCIA beamline at SOLEIL.

    PubMed

    Vantelon, D; Trcera, N; Roy, D; Moreno, T; Mailly, D; Guilet, S; Metchalkov, E; Delmotte, F; Lassalle, B; Lagarde, Pierre; Flank, A-M

    2016-03-01

    Commissioned in May 2004 on the SLS machine, the LUCIA beamline was moved to the synchrotron SOLEIL during the summer of 2008. To take advantage of this new setting several changes to its design were introduced. Here, a review of the various improvements of the mechanics and, mostly, of the optics is given. Described in detail are the results of a new multilayer grating monochromator implemented on the Kohzu vessel already holding the two-crystal set-up. It consists of a grating grooved onto a multilayer (replacing the first crystal) associated to a multilayer (as a second crystal). It allows a shift of the low-energy limit of the beamline to around 500 eV with an energy resolution and a photon flux comparable with those of the previous couples of crystals (KTP and beryl).

  14. Design of the LBNF Beamline

    SciTech Connect

    Papadimitriou, V.; Andrews, R.; Hylen, J.; Kobilarcik, T.; Krafczyk, G.; Marchinonni, A.; Moore, C. D.; Schlabach, P.; Tariq, S.

    2015-08-30

    The Long Baseline Neutrino Facility (LBNF) will utilize a beamline located at Fermilab to carry out a compelling research program in neutrino physics. The facility will aim a wide band neutrino beam toward underground detectors placed at the SURF Facility in South Dakota, about 1,300 km away. The main elements of the facility are a primary proton beamline and a neutrino beamline. The primary proton beam (60-120 GeV) will be extracted from the MI-10 section of Fermilab’s Main Injector. Neutrinos are produced after the protons hit a solid target and produce mesons which are subsequently focused by magnetic horns into a 204 m long decay pipe where they decay into muons and neutrinos. The parameters of the facility were determined taking into account the physics goals, spacial and radiological constraints and the experience gained by operating the NuMI facility at Fermilab. The initial proton beam power is expected to be 1.2 MW; however, the facility is designed to be upgradeable to 2.4 MW. We discuss here the design status and the associated challenges as well as plans for improvements before baselining the facility.

  15. Design of the LBNE Beamline

    SciTech Connect

    Papadimitriou, Vaia; Andrews, Richard; Hylen, James; Kobilarcik, Thomas; Marchionni, Alberto; Moore, Craig D.; Schlabach, Phil; Tariq, Salman

    2015-02-05

    The Long Baseline Neutrino Experiment (LBNE) will utilize a beamline facility located at Fermilab to carry out a compelling research program in neutrino physics. The facility will aim a wide band beam of neutrinos toward a detector placed at the Sanford Underground Research Facility in South Dakota, about 1,300 km away. The main elements of the facility are a primary proton beamline and a neutrino beamline. The primary proton beam (60-120 GeV) will be extracted from the MI-10 section of Fermilab’s Main Injector. Neutrinos are produced after the protons hit a solid target and produce mesons which are sign selected and subsequently focused by a set of magnetic horns into a 204 m long decay pipe where they decay mostly into muons and neutrinos. The parameters of the facility were determined taking into account the physics goals, spacial and radiological constraints, and the experience gained by operating the NuMI facility at Fermilab. The initial beam power is expected to be ~1.2 MW; however, the facility is designed to be upgradeable for 2.3 MW operation. We discuss here the status of the design and the associated challenges.

  16. Satellite Power System (SPS) societal assessment

    SciTech Connect

    Not Available

    1980-12-01

    Construction and operation of a 60-unit (300 GW) domestic SPS over the period 2000 to 2030 would stress many segments of US society. A significant commitment of resources (land, energy, materials) would be required, and a substantial proportion of them would have to be committed prior to the production of any SPS electricity. Estimated resource demands, however, seem to be within US capabilities. Modifications will be required of institutions called upon to deal with SPS. These include financial, managerial and regulatory entities and, most particularly, the utility industry. Again, the required changes, while certainly profound, seem to be well within the realm of possibility. Enhanced cooperation in international affairs will be necessary to accommodate development and operation of the SPS. To remove its potential as a military threat and to reduce its vulnerability, either the SPS itself must become an international enterprise, or it must be subject to unrestricted international inspection. How either of these objectives could, in fact, be achieved, or which is preferable, remains unclear. Forty-four concerns about the SPS were identified via a public outreach experiment involving 9000 individuals from three special interest organizations. The concerns focused on environmental impacts (particularly the effects of microwave radiation) and the centralizing tendency of the SPS on society. The interim results of the public outreach experiment influenced the scope and direction of the CDEP; the final results will be instrumental in defining further societal assessment efforts.

  17. Satellite Power System (SPS) public outreach experiment

    NASA Technical Reports Server (NTRS)

    Mcneal, S. R.

    1980-01-01

    An outreach experiment was conducted to improve the results of the satellite power system (SPS) concept development and evaluation program. The objectives of the outreach were to: (1) determine the areas of major concern relative to the SPS concept and (2) gain experience with an outreach process for use in future public involvement. The response to the outreach effort was positive, suggesting that the effort extended by the SPS project division to encourage an information exchange with the public was well received. The responses were analyzed and from them some questions and answers about the satellite power system are presented.

  18. Satellite Power System (SPS) military applications

    NASA Technical Reports Server (NTRS)

    Ozeroff, M. J.

    1978-01-01

    The potential military role, both offensive and defensive, of a Satellite Power System (SPS) is examined. A number of potential military support possibilities are described. An SPS with military capabilities may have a strong negative impact on international relations if it is not internationalized. The SPS satellite would be vulnerable to military action of an enemy with good space capability, but would experience little or no threat from saboteurs or terrorists, except via the ground controls. The paper concludes with an outline of some of the key issues involved, and a number of recommendations for future study, including some areas for long term efforts.

  19. Beam splitting mirrors for an APS beamline.

    SciTech Connect

    Khounsary, A.; McNulty, I.; X-Ray Science Division

    2007-01-01

    We describe a set of two cooled mirrors used in tandem on a high-heat-load undulator beamline at the Advanced Photon Source (APS) to spatially split an incoming X-ray beam into two parts, allowing simultaneous operation on two beamlines. Such arrangements have the potential to increase beamline throughput by as much as a factor of two at a modest cost. Conceptual design, engineering analyses, and fabrication steps are outlined.

  20. Beamline 9.0.1 - a high-resolution undulator beamline for gas-phase spectroscopy

    SciTech Connect

    Bozek, J.D.; Heimann, P.A.; Mossessian, D.

    1997-04-01

    Beamline 9.0.1 at the Advanced Light Source is an undulator beamline with a Spherical Grating Monochromator (SGM) which provides very high resolution and flux over the photon energy range 20-320eV. The beamline has been used primarily by the atomic and molecular science community to conduct spectroscopy experiments using electron, ion and fluorescence photon detection. A description of the beamline and its performance will be provided in this abstract.

  1. An object model for beamline descriptions

    SciTech Connect

    Hill, Barrey W.; Martono, Hendy; Gillespie, James S.

    1997-02-01

    Translation of beamline model descriptions between different accelerator codes presents a unique challenge due to the different representations used for various elements and subsystems. These differences range from simple units conversions to more complex translations involving multiple beamline components. A representation of basic accelerator components is being developed in order to define a meta-structure from which beamline models, in different codes, can be described and to facilitate the translation of models between these codes. Sublines of basic components will be used to represent more complex beamline descriptions and bridge the gap between codes which may represent a beamline element as a single entity, and those which use multiple elements to describe the same physical device. A C++ object model for supporting this beamline description and a grammar for describing beamlines in terms of these components is being developed. The object model will support a common graphic user interface and translation filters for representing native beamline descriptions for a variety of accelerator codes. An overview of our work on the object model for beamline descriptions is presented here.

  2. SPS Beam Steering for LHC Extraction

    SciTech Connect

    Gianfelice-Wendt, Eliana; Bartosik, Hannes; Cornelis, Karel; Norderhaug Drøsdal, Lene; Goddard, Brennan; Kain, Verena; Meddahi, Malika; Papaphilippou, Yannis; Wenninger, Jorg

    2014-07-01

    The CERN Super Proton Synchrotron accelerates beams for the Large Hadron Collider to 450 GeV. In addition it produces beams for fixed target facilities which adds complexity to the SPS operation. During the run 2012-2013 drifts of the extracted beam trajectories have been observed and lengthy optimizations in the transfer lines were performed to reduce particle losses in the LHC. The observed trajectory drifts are consistent with the measured SPS orbit drifts at extraction. While extensive studies are going on to understand, and possibly suppress, the source of such SPS orbit drifts the feasibility of an automatic beam steering towards a “golden” orbit at the extraction septa, by means of the interlocked correctors, is also being investigated. The challenges and constraints related to the implementation of such a correction in the SPS are described. Simulation results are presented and a possible operational steering strategy is proposed.

  3. Structure and function of the peanut panallergen Ara h 8

    USDA-ARS?s Scientific Manuscript database

    The incidence of peanut allergy continues to rise in the US and Europe; whereas, exposure to the major allergens Ara h 1, 2, 3, and 6 can cause fatal anaphylaxis, exposure to the minor allergens usually does not. Ara h 8 is a minor allergen. Importantly, it is the minor food allergens that are tho...

  4. Terrestrial Energy Storage SPS Systems

    NASA Technical Reports Server (NTRS)

    Brandhorst, Henry W., Jr.

    1998-01-01

    Terrestrial energy storage systems for the SSP system were evaluated that could maintain the 1.2 GW power level during periods of brief outages from the solar powered satellite (SPS). Short-term outages of ten minutes and long-term outages up to four hours have been identified as "typical" cases where the ground-based energy storage system would be required to supply power to the grid. These brief interruptions in transmission could result from performing maintenance on the solar power satellite or from safety considerations necessitating the power beam be turned off. For example, one situation would be to allow for the safe passage of airplanes through the space occupied by the beam. Under these conditions, the energy storage system needs to be capable of storing 200 MW-hrs and 4.8 GW-hrs, respectively. The types of energy storage systems to be considered include compressed air energy storage, inertial energy storage, electrochemical energy storage, superconducting magnetic energy storage, and pumped hydro energy storage. For each of these technologies, the state-of-the-art in terms of energy and power densities were identified as well as the potential for scaling to the size systems required by the SSP system. Other issues addressed included the performance, life expectancy, cost, and necessary infrastructure and site locations for the various storage technologies.

  5. Synthesis, High-Resolution Infrared Spectroscopy, and Vibrational Structure of Cubane, C8H8.

    PubMed

    Boudon, V; Lamy, M; Dugue-Boyé, F; Pirali, O; Gruet, S; D'Accolti, L; Fusco, C; Annese, C; Alikhani, M E

    2016-06-30

    Carbon-cage molecules have generated a considerable interest from both experimental and theoretical points of view. We recently performed a high-resolution study of adamantane (C10H16), the smallest hydrocarbon cage belonging to the diamandoid family ( Pirali , O. ; et al. J. Chem. Phys. 2012 , 136 , 024310 ). There exist another family of hydrocarbon cages with additional interesting chemical properties: the so-called platonic hydrocarbons that comprise dodecahedrane (C20H20) and cubane (C8H8). Both possess C-C bond angles that deviate from the tetrahedral angle (109.8°) of the sp(3) hybridized form of carbon. This generates a considerable strain in the molecule. We report a new wide-range high-resolution study of the infrared spectrum of cubane. The sample was synthesized in Bari upon decarboxylation of 1,4-cubanedicarboxylic acid thanks to the improved synthesis of literature. Several spectra have been recorded at the AILES beamline of the SOLEIL synchrotron facility. They cover the 600-3200 cm(-1) region. Besides the three infrared-active fundamentals (ν10, ν11, and ν12), we could record many combination bands, all of them displaying a well-resolved octahedral rotational structure. We present here a preliminary analysis of some of the recorded bands, performed thanks the SPVIEW and XTDS software, based on the tensorial formalism developed in the Dijon group. A comparison with ab initio calculations, allowing to identify some combination bands, is also presented.

  6. Peanut component Ara h 8 sensitization and tolerance to peanut.

    PubMed

    Asarnoj, Anna; Nilsson, Caroline; Lidholm, Jonas; Glaumann, Susanne; Östblom, Eva; Hedlin, Gunilla; van Hage, Marianne; Lilja, Gunnar; Wickman, Magnus

    2012-08-01

    Isolated Ara h 8 sensitization is suggested to be associated with no or mild symptoms among peanut-sensitized subjects. We sought to investigate the occurrence of systemic reactions in children with isolated sensitization to Ara h 8. Participants were 144 children sensitized to Ara h 8 (≥ 0.35 kU(A)/L) but not to Ara h 1, Ara h 2, or Ara h 3 (<0.35 kU(A)/L). An open oral challenge with peanut was performed in those subjects who did not consume peanut regularly, and an extended IgE reactivity profile was obtained. If the child had a documented history of systemic reactions up to grade I anaphylaxis, double-blind, placebo-controlled food challenges were performed. One hundred twenty-nine (89.5%) children were either peanut consumers or did not react to peanut challenge. Another 14 (9.7%) children experienced oral cavity symptoms at the first 2 but not subsequent challenge doses. At the time of the double-blind, placebo-controlled food challenge, 1 boy with a previous mild systemic reaction to peanut experienced lip swelling, stomach cramping, and objective tiredness. Reanalysis of IgE levels showed an increase in peanut IgE levels from 1.5 to 8.8 kU(A)/L, but IgE levels to Ara h 8 remained stable and IgE levels to Ara h 1, Ara h 2, and Ara h 3 were all still less than 0.35 kU(A)/L. The IgE level to Ara h 6 was 0.45 kU(A)/L. Isolated Ara h 8 sensitization indicates tolerance to peanuts in almost all cases. However, sensitization against thus far unidentified determinants in peanut might cause symptoms in rare cases. Copyright © 2012 American Academy of Allergy, Asthma & Immunology. Published by Mosby, Inc. All rights reserved.

  7. Some aspects of SR beamline alignment

    NASA Astrophysics Data System (ADS)

    Gaponov, Yu. A.; Cerenius, Y.; Nygaard, J.; Ursby, T.; Larsson, K.

    2011-09-01

    Based on the Synchrotron Radiation (SR) beamline optical element-by-element alignment with analysis of the alignment results an optimized beamline alignment algorithm has been designed and developed. The alignment procedures have been designed and developed for the MAX-lab I911-4 fixed energy beamline. It has been shown that the intermediate information received during the monochromator alignment stage can be used for the correction of both monochromator and mirror without the next stages of alignment of mirror, slits, sample holder, etc. Such an optimization of the beamline alignment procedures decreases the time necessary for the alignment and becomes useful and helpful in the case of any instability of the beamline optical elements, storage ring electron orbit or the wiggler insertion device, which could result in the instability of angular and positional parameters of the SR beam. A general purpose software package for manual, semi-automatic and automatic SR beamline alignment has been designed and developed using the developed algorithm. The TANGO control system is used as the middle-ware between the stand-alone beamline control applications BLTools, BPMonitor and the beamline equipment.

  8. Design of the LBNF Beamline

    SciTech Connect

    Papadimitriou, Vaia; et al.

    2016-06-01

    The Long Baseline Neutrino Facility (LBNF) will utilize a beamline located at Fermilab to provide and aim a neutrino beam of sufficient intensity and appropriate energy range toward DUNE detectors, placed deep underground at the SURF Facility in South Dakota. The primary proton beam (60 - 120 GeV) will be extracted from the MI-10 section of Fermilab's Main Injector. Neutrinos are produced after the protons hit a solid target and produce mesons which are subsequently focused by magnetic horns into a 194 m long decay pipe where they decay into muons and neutrinos. The parameters of the facility were determined taking into account the physics goals, spacial and radiological constraints and the experience gained by operating the NuMI facility at Fermilab. The Beamline facility is designed for initial operation at a proton-beam power of 1.2 MW, with the capability to support an upgrade to 2.4 MW. LBNF/DUNE obtained CD-1 approval in November 2015. We discuss here the design status and the associated challenges as well as the R&D and plans for improvements before baselining the facility.

  9. BNL ATF II beamlines design

    SciTech Connect

    Fedurin, M.; Jing, Y.; Stratakis, D.; Swinson, C.

    2015-05-03

    The Brookhaven National Laboratory. Accelerator Test Facility (BNL ATF) is currently undergoing a major upgrade (ATF-II). Together with a new location and much improved facilities, the ATF will see an upgrade in its major capabilities: electron beam energy and quality and CO2 laser power. The electron beam energy will be increased in stages, first to 100-150 MeV followed by a further increase to 500 MeV. Combined with the planned increase in CO2 laser power (from 1-100 TW), the ATF-II will be a powerful tool for Advanced Accelerator research. A high-brightness electron beam, produced by a photocathode gun, will be accelerated and optionally delivered to multiple beamlines. Besides the energy range (up to a possible 500 MeV in the final stage) the electron beam can be tailored to each experiment with options such as: small transverse beam size (<10 um), short bunch length (<100 fsec) and, combined short and small bunch options. This report gives a detailed overview of the ATFII capabilities and beamlines configuration.

  10. Structure and Function of the Peanut Panallergen Ara h 8*

    PubMed Central

    Hurlburt, Barry K.; Offermann, Lesa R.; McBride, Jane K.; Majorek, Karolina A.; Maleki, Soheila J.; Chruszcz, Maksymilian

    2013-01-01

    The incidence of peanut allergy continues to rise in the United States and Europe. Whereas exposure to the major allergens Ara h 1, 2, 3, and 6 can cause fatal anaphylaxis, exposure to the minor allergens usually does not. Ara h 8 is a minor allergen. Importantly, it is the minor food allergens that are thought to be responsible for oral allergy syndrome (OAS), in which sensitization to airborne allergens causes a Type 2 allergic reaction to ingested foods. Furthermore, it is believed that similar protein structure rather than a similar linear sequence is the cause of OAS. Bet v 1 from birch pollen is a common sensitizing agent, and OAS results when patients consume certain fruits, vegetables, tree nuts, and peanuts. Here, we report the three-dimensional structure of Ara h 8, a Bet v 1 homolog. The overall fold is very similar to that of Bet v 1, Api g 1 (celery), Gly m 4 (soy), and Pru av 1 (cherry). Ara h 8 binds the isoflavones quercetin and apigenin as well as resveratrol avidly. PMID:24253038

  11. Satellite Power System (SPS) student participation

    NASA Technical Reports Server (NTRS)

    Ladwig, A.; David, L.

    1978-01-01

    A assessment of methods which are appropriate to initiate student participation in the discussion of a satellite power system (SPS) is presented. Methods which are incorporated into the campus environment and the on-going learning experience are reported. The discussion of individual methods for student participation includes a description of the technique, followed by comments on its enhancing and limiting factors, references to situations where the method has been demonstrated, and a brief consideration of cost factors. The two categories of recommendations presented are: an outline of fourteen recommendations addressing specific activities related to student participation in the discussion of SPS, and three recommendations pertaining to student participation activities in general.

  12. An overview on European SPS activities

    NASA Technical Reports Server (NTRS)

    Reinhartz, K. K.

    1980-01-01

    The organization of space and energy research in Europe is discussed. The European situation is highlighted with emphasis on the dependency of energy imports and on the energy requirements of Europe. The status of SPS research in the countries that form the European Space Agency was reviewed. It is concluded that in view of the unfavorable geographical and climatic situation of large parts of Europe, terrestrial solar energy conversion is unlikely to make a significant contribution to Europe's future energy supply. Thus, SPS development is of special interest to the European community.

  13. Microspectroscopy At Beamline 73 MAX-lab

    SciTech Connect

    Engdahl, Anders

    2010-02-03

    Presentation of some projects at the infrared microspectroscopy experimental station at beamline 73 MAX-lab. Among the subjects are found identification of organic residues in fossil material and examination of the chemistry in an old oak wood wreck.

  14. Satellite Power System (SPS) concept definition study (exhibit C)

    NASA Technical Reports Server (NTRS)

    1978-01-01

    The SPS program plan is outlined. An overall review of the component systems which comprise the SPS is presented. The report is presented in the form of charts, graphs, data tables, and engineering drawings.

  15. The Super Proton Synchrotron (SPS): A Tale of Two Lives

    NASA Astrophysics Data System (ADS)

    Doble, Niels; Gatignon, Lau; Hübner, Kurt; Wilson, Edmund

    The following sections are included: * Introduction * SPS Distributed Control System: The Emergence of Local Area Networks * SPS Controls: A Part of Touch-Screen History * The SPS Muon Beam: Energy, Intensity and Precision * Two Very Special K0 Beams: Discovery of Direct CP Violation * Liquid Krypton Calorimetry: Elucidating Nature's Subtle Asymmetries * Bubble Chambers at the SPS: A Technique at its Apogee * Polarized Targets: Pointing to New Directions * The Silicon Age: Micrometre Precision Millions of Times a Second * References

  16. Metrology and Tests Beamline at SOLEIL

    SciTech Connect

    Idir, Mourad; Mercere, Pascal; Moreno, Thierry; Delmotte, Aurelien

    2007-01-19

    The objectives of this project is to design and install at the SOLEIL synchrotron radiation source a calibration and metrology test facility for the R and D of optical components and detectors. We propose to build, on a bending magnet, three branches dedicated to VUV, soft x-ray and hard x-ray energy ranges. The beamline will cover an energy range from few eV to 28 keV and give access to white beam from the bending magnet. This installation will first address the needs of the SOLEIL experimental groups (Optics and Detectors) and will be used by a large community. This beamline will also be valuable as a general-purpose beamline to prepare, test and set up a wide range of experiments in the field of Astrophysics, laser plasma etc. A complementary important aspect of this installation is the realization of primary standard: the metrology beamline of SOLEIL could become the national primary standard source in collaboration with the Laboratoire National d'Essais (LNE) and help in the design and characterization of several diagnostics for the Megajoule Laser in Bordeaux in collaboration with the CEA DIF. The beamline has been designed to provide great flexibility. In this paper, we describe the beamline design, capabilities, and end station instrumentation.

  17. SPS Fabric of the Cosmos Cafe

    NASA Astrophysics Data System (ADS)

    Chakrabarti, Anish

    2012-02-01

    Hosted by Brian Greene and based on his best-selling book of the same title, The Fabric of the Cosmos is a new four- part NOVA series that explores the deepest mysteries of space and time. The program was kicked-off by 30 ``Cosmic Cafes'' being held around the country funded by an NSF grant which allows SPS-NOVA to fund SPS chapters for these events. During the summer I assisted in planning this kick-off, reviewing and suggesting revisions of resources related to the NOVA series to make them relevant to an SPS audience. I also got to organize and moderate the first ``Cosmic Cafe.'' The Cosmic cafe that I organized was discussion based, with our speaker Dr. James Gates starting with a short talk and then opening the floor up for questions. By organizing a ``Cosmic cafe,'' I got real hand experience about the challenges an SPS chapter would face while organizing a cafe themselves. Based on my experience I shall also discuss the effectiveness of the first ever themed science cafe blitz. A science caf'e is an informal discussion with an expert in a very casual location, usually a restaurant, coffee shop, or a bar. A science cafe is mostly discussion based, but has a lot of freedom for the format. A ``Cosmic'' cafe is a science cafe which is based around the topics discussed in the documentary ``The Fabric of the Cosmos.''

  18. Compact IR synchrotron beamline design.

    PubMed

    Moreno, Thierry

    2017-03-01

    Third-generation storage rings are massively evolving due to the very compact nature of the multi-bend achromat (MBA) lattice which allows amazing decreases of the horizontal electron beam emittance, but leaves very little place for infrared (IR) extraction mirrors to be placed, thus prohibiting traditional IR beamlines. In order to circumvent this apparent restriction, an optimized optical layout directly integrated inside a SOLEIL synchrotron dipole chamber that delivers intense and almost aberration-free beams in the near- to mid-IR domain (1-30 µm) is proposed and analyzed, and which can be integrated into space-restricted MBA rings. Since the optics and chamber are interdependent, the feasibility of this approach depends on a large part on the technical ability to assemble mechanically the optics inside the dipole chamber and control their resulting stability and thermo-mechanical deformation. Acquiring this expertise should allow dipole chambers to provide almost aberration-free IR synchrotron sources on current and `ultimate' MBA storage rings.

  19. Satellite Power System (SPS) FY 79 Program Summary

    SciTech Connect

    Not Available

    1980-01-01

    The Satellite Power System (SPS) program is a joint effort of the US Department of Energy (DOE) and the National Aeronautics and Space Administration (NASA). It is managed by the SPS Project Office within DOE's Office of Energy Research. SPS project organization is shown in Figure 1. The SPS Project Office was established in 1978 and is responsible for the planning, management and integration of SPS research in four areas: systems definition, environmental assessment, societal assessment, and comparative assessment. In fulfilling its responsibilities, the SPS Project Office directs research and assessment efforts to determine the feasibility of the SPS concept, funds organizations supporting the program, and disseminates information developed from project research and assessments. The objective of the SPS program is to develop an initial understanding of the technical feasibility, the economic practicality, and the social and environmental acceptability of the SPS concept. This is being accomplished through implementation of the Concept Development and Evaluation Program Plan which is scheduled for completion by the end of FY 1980. The SPS Project Office annually issues a Program Summary which describes the research undertaken during the preceding fiscal year. This Program Summary covers FY 1979. It includes work completed in FY 1977 and FY 1978 in order to give a comprehensive picture of the DOE involvement in the SPS concept development and evaluation process.

  20. New SRC APPLE ll Variable Polarization Beamline

    SciTech Connect

    M Severson; M Bissen; M Fisher; G Rogers; R Reininger; M Green; D Eisert; B Tredinnick

    2011-12-31

    SRC has recently commissioned a new Varied Line-Spacing Plane Grating Monochromator (VLS-PGM) utilizing as its source a 1 m long APPLE II insertion device in short-straight-section 9 of the Aladdin storage ring. The insertion device reliably delivers horizontal, vertical, and right and left circularly polarized light to the beamline. Measurements from an in situ polarimeter can be used for undulator corrections to compensate for depolarizing effects of the beamline. The beamline has only three optical elements and covers the energy range from 11.1 to 270 eV using two varied line-spacing gratings. A plane mirror rotates to illuminate the gratings at the correct angle to cancel the defocus term at all photon energies. An exit slit and elliptical-toroid refocusing mirror complete the beamline. Using a 50 {mu}m exit slit, the beamline provides moderate to high resolution, with measured flux in the mid 10{sup 12} (photons/s/200 mA) range, and a spot size of 400 {mu}m horizontal by 30 {mu}m vertical.

  1. New options for satellite power systems /SPS/

    NASA Technical Reports Server (NTRS)

    Hanley, G. M.

    1977-01-01

    The operation of a satellite power system (SPS) involves the conversion of solar energy into electrical energy with the aid of facilities carried by a geosynchronous satellite, the transmission of the obtained energy to earth in the form of microwave radio frequency energy, and the conversion of the energy received on earth into dc current for distribution into the network. Attention is given to questions concerning suitable microwave radiation density, details of space transportation for the construction of the SPS, and suitable approaches for the transformation of the solar energy into electric energy. It appears that a Rankine cycle using cesium as the main working fluid and a steam bottoming cycle might have advantages over a Brayton cycle concept considered earlier. In the area of solar photovoltaic concepts GaAlAs cells have advantages over silicon cells related to lighter weight, efficiency, and resistance to space radiation. The required amount of gallium seems to become available.

  2. SPS Internship: Working With Physics To Go

    NASA Astrophysics Data System (ADS)

    Hancock, Logan

    2008-10-01

    The Physics To Go website (www.physicstogo.com) is one of many collections of ComPADRE, an online library of electronic resources devoted to physics and astronomy education, funded by the National Science Foundation. Physics To Go, produced by the American Physical Society (APS), is a collection focused on informal physics learning, targeted towards self-motivated learners and the general public. My contributions to the site this summer consisted of obtaining useful materials to add to the collection and working to update the homepage's ``mini-magazine'' every two weeks. I was selected for this position at APS by the Society of Physics Students (SPS) summer internship program, hosted by the American Institute of Physics (AIP) in College Park, MD. This internship is presented to a number of physics undergraduates each year and offers opportunities in research and science policy/outreach positions at SPS, APS, AAPT, NASA, and NIST.

  3. Satellite power system (SPS) initial insurance evaluation

    SciTech Connect

    1980-09-01

    The beginning of a process to educate the insurance industry about the Satellite Power System is reported. The report is divided into three sections. In the first section a general history describes how space risks are being insured today. This is followed by an attempt to identify the major risks inherent to the SPS. The final section presents a general projection of insurance market reactions to the Satellite Power System.

  4. SPS emissions and comparison with ambient loadings

    SciTech Connect

    Bauer, E.; Brubaker, K. L.

    1980-01-01

    This paper provides an overview of propulsion injections into the atmosphere due to Satellite Power System (SPS) transportation vehicles, and relates the magnitudes of these injections to the ambient burdens of the different chemical species. The significance of the different injections is discussed in terms of a dimensionless perturbation factor, the magnitude of which is a measure of the expected concentration change relative to the existing ambient concentration.

  5. Status of the Dortmund TGM3-Beamline

    SciTech Connect

    Berges, U.; Westphal, C.; Dreiner, S.; Krause, M.

    2004-05-12

    The former TGM3 beamline at BESSYI was rebuilt at the DELTA storage ring, University of Dortmund, Germany. The beamline uses synchrotron radiation from a dipole bending magnet. The previous design of the beamline had to be adapted to an operation at DELTA. This included a motorized rotation of the first mirror, since that mirror is located within the radiation shield wall at DELTA. Also, further minor components had to be modified, adapted, or replaced. During the set-up at DELTA, previously known operation problems due to mechanical vibrations were eliminated by a complete new mounting of the optical components. The measured performance parameters at BESSYI are compared with calculated results for an operation at DELTA. The first commissioning experiments are currently carried out.

  6. nuSTORM Pion Beamline Design Update

    SciTech Connect

    Liu, A.; Bross, A.; Neuffer, D.; Lee, S. Y.

    2013-09-01

    A facility producing neutrinos from muons that decay in a racetrack ring can provide extremely well understood neutrino beams for oscillation physics and the search for sterile neutrinos. The “neutrinos from STORed Muons” (nuSTORM) facility based on this idea has been introduced by Bross, Neuffer et al. The design of the nuSTORM facility and the particle tracking have been presented in the paper of Liu, et al. This paper demonstrates the recent optimization results of the pion beamline, with G4beamline simulations. The optimum choice of pion beam center momentum, a new algorithm on fitting bivariate Gaussian distribution to the pion phase space data at the downstream side of the horn, and the comparison of the beamline performance with the optics designed based on Graphite and Inconel targets are also described.

  7. G4Beamline Program for Radiation Simulations

    SciTech Connect

    Beard, Kevin; J. Roberts, Thomas; Degtiarenko, Pavel

    2008-07-01

    G4beamline, a program that is an interface to the Geant4 toolkit that we have developed to simulate accelerator beamlines, is being extended with a graphical user interface to quickly and efficiently model experimental equipment and its shielding in experimental halls. The program is flexible, user friendly, and requires no programming by users, so that even complex systems can be simulated quickly. This improved user interface is of much wider application than just the shielding simulations that are the focus of this project. As an initial application, G4beamline is being extended to provide the simulations that are needed to determine the radiation sources for the proposed experiments at Jefferson Laboratory so that shielding issues can be evaluated. Since the program already has the capabilities needed to simulate the transport of all known particles, including scattering, attenuation, interactions, and decays, the extension involves implementing a user-friendly graphical user inter

  8. Importance of suspended sediment (SPS) composition and grain size in the bioavailability of SPS-associated pyrene to Daphnia magna.

    PubMed

    Xia, Xinghui; Zhang, Xiaotian; Zhou, Dong; Bao, Yimeng; Li, Husheng; Zhai, Yawei

    2016-07-01

    Hydrophobic organic compounds (HOCs) tend to associate with suspended sediment (SPS) in aquatic environments; the composition and grain size of SPS will affect the bioavailability of SPS-associated HOCs. However, the bioavailability of HOCs sorbed on SPS with different compositions and grain sizes is not well understood. In this work, passive dosing devices were made to control the freely dissolved concentration of pyrene, a typical HOC, in the exposure systems. The effect of pyrene associated with amorphous organic carbon (AOC), black carbon (BC), and minerals of SPS with grain sizes of 0-50 μm and 50-100 μm on the immobilization and enzymatic activities of Daphnia magna was investigated to quantify the bioavailability of pyrene sorbed on SPS with different grain sizes and compositions. The results showed that the contribution of AOC-, BC-, and mineral-associated pyrene to the total bioavailability of SPS-associated pyrene was approximately 50%-60%, 10%-29%, and 20%-30%, respectively. The bioavailable fraction of pyrene sorbed on the three components of SPS was ordered as AOC (22.4%-67.3%) > minerals (20.1%-46.0%) > BC (9.11%-16.8%), and the bioavailable fraction sorbed on SPS of 50-100 μm grain size was higher than those of 0-50 μm grain size. This is because the SPS grain size will affect the ingestion of SPS and the SPS composition will affect the desorption of SPS-associated pyrene in Daphnia magna. According to the results obtained in this study, a model has been developed to calculate the bioavailability of HOCs to aquatic organisms in natural waters considering both SPS grain size and composition.

  9. National synchrotron light source user's manual: Guide to the VUV and x-ray beamlines: Third edition

    SciTech Connect

    Gmuer, N.F.; Thomlinson, W.; White-DePace, S.

    1989-01-01

    This report contains information on the following topics: A Word on the Writing of Beamline Descriptions; Beamline Equipment Utilization for General Users; the Vacuum Ultraviolet (VUV) Storage Ring and Beamlines; VUV Beamline Descriptions--An Explanation; VUV Beamline Descriptions; X-Ray Storage Ring and Beamlines; X-Ray Beamline Descriptions--An Explanation; and X-Ray Beamline Descriptions.

  10. IR beamline at the Swiss Light Source

    NASA Astrophysics Data System (ADS)

    Ph, Lerch; L, Quaroni; J, Wambach; J, Schneider; B, Armstrong D.; D, Rossetti; L, Mueller F.; P, Peier; V, Schlott; L, Carroll; P, Friedli; H, Sigg; S, Stutz; M, Tran

    2012-05-01

    The infrared beamline at the Swiss light source uses dipole radiation and is designed to transport light to four experimental stations, A, B, C, D. Branch A is dedicated to far IR work in vacuum; branch B is a micro-spectrometer; branch C is dedicated to high resolution spectroscopy in the gas phase; branch D is a pump and probe set-up. This contribution describes the optical layout and provides a brief survey of currently available experimental stations. The beamline is in regular user operation since 2009.

  11. High-Resolution Infrared Spectroscopy of Cubane, C_8H_8

    NASA Astrophysics Data System (ADS)

    Boudon, Vincent; Pirali, Olivier; Gruet, Sébastien; D'accolti, Lucia; Fusco, Caterina; Annese, Cosimo

    2014-06-01

    Carbon-cage molecules have generated a considerable interest from both experimental and theoretical point of views. We recently performed a high-resolution study of adamantane (C10H16), the smallest hydrocarbon cage belonging to the diamandoid family. There exist another family of hydrocarbon cages with additional interesting chemical properties: the so-called Platonic hydrocarbons that comprise dodecahedrane (C20H20) and cubane (C_8H_8). Both possess C-C bond angles that deviate from the tetrahedral angle (109.8°) of the sp^3 hybridized form of carbon. This generates a considerable strain in the molecule. Cubane itself has the highest density of all hydrocarbons (1.29 g/cm^3). This makes it able to store larges amounts of energy, although the molecule is fully stable. Up to now, only one high-resolution study of cubane has been performed on a few bands [2]. We report here a new wide-range high-resolution study of the infrared spectrum of cubane. The sample was synthesized in Bari upon decarboxylation of 1,4-cubanedicarboxylic acid thanks to the improved synthesis of literature [3]; its {}1H and 13C NMR, FTIR, and mass spectrometry agreed with reported data [4]. Several spectra have been recorded at the AILES beamline of the SOLEIL French synchrotron facility. They cover the 800 to 3100 cm-1 region. Besides the three infrared-active fundamentals (ν10, ν11 and ν12), we could record many combination bands, all of them displaying a well-resolved octahedral rotational structure. We present here a preliminary analysis of some of the recorded bands, performed thanks the SPVIEW and XTDS software, based on the tensrorial formalism developed in the Dijon group [5]. [1] O. Pirali, V. Boudon, J. Oomens, M. Vervloet, J. Chem. Phys., 136, 024310 (2012). [2] A. S. Pine, A. G. Maki, A. G. Robiette, B. J. Krohn, J. K. G. Watson, Th. Urbanek, J. Am. Chem. Soc., 106, 891-897 (1984). [3] P. E. Eaton, N. Nordari, J. Tsanaktsidis, P. S. Upadhyaya, Synthesis, 1, 501, (1995). [4] E

  12. Status of the ELIMED multidisciplinary and medical beam-line at ELI-Beamlines

    NASA Astrophysics Data System (ADS)

    Romano, F.; Cirrone, G. A. P.; Cuttone, G.; Schillaci, F.; Scuderi, V.; Amico, A.; Candiano, G.; Giordanengo, S.; Guarachi, L. F.; Korn, G.; Larosa, G.; Leanza, R.; Manna, R.; Marchese, V.; Marchetto, F.; Margarone, D.; Milluzzo, G.; Petringa, G.; Pipek, J.; Sacchi, R.; Vignati, A.

    2017-01-01

    Nowadays, one of the biggest challenges consists in using high intensity laser-target interaction to generate high-energy ions for medical purposes, eventually replacing the old paradigm of acceleration characterized by huge and complex machines. In order to investigate the feasibility of using laser-driven ion beams for multidisciplinary application, a dedicated beam transport line will be installed at the ELI-Beamlines facility in Prague (CZ), as a part of the User-oriented ELIMAIA beam-line dedicated to ion acceleration and their potential applications. The beam-line section dedicated to transport and dosimetric endpoints is called ELIMED (ELI-Beamlines MEDical and multidisciplinary applications) and will be developed by the INFN-LNS.

  13. Neutral beamline with improved ion energy recovery

    DOEpatents

    Dagenhart, William K.; Haselton, Halsey H.; Stirling, William L.; Whealton, John H.

    1984-01-01

    A neutral beamline generator with unneutralized ion energy recovery is provided which enhances the energy recovery of the full energy ion component of the beam exiting the neutralizer cell of the beamline. The unneutralized full energy ions exiting the neutralizer are deflected from the beam path and the electrons in the cell are blocked by a magnetic field applied transverse to the beamline in the cell exit region. The ions, which are generated at essentially ground potential and accelerated through the neutralizer cell by a negative acceleration voltage, are collected at ground potential. A neutralizer cell exit end region is provided which allows the magnetic and electric fields acting on the exiting ions to be closely coupled. As a result, the fractional energy ions exiting the cell with the full energy ions are reflected back into the gas cell. Thus, the fractional energy ions do not detract from the energy recovery efficiency of full energy ions exiting the cell which can reach the ground potential interior surfaces of the beamline housing.

  14. Beamline smoothing of the Advanced Photon Source

    SciTech Connect

    Friedsam, H.; Penicka, M.; Zhao, S.

    1995-06-01

    This paper outlines a general beamline smoothing concept based on the use of First Principle Component analysis. Bean-dine smoothing is commonly used for the detection of blunders in the positioning of beam elements and to provide a smooth particle beam path with the fewest adjustments to individual beam components. It also provides the data for assessment of the achieved positioning quality.

  15. The APS beamline front end vacuum system

    SciTech Connect

    Nielsen, R.W.

    1993-10-15

    This report discusses the design of the vacuum system for the advanced photon source beamline front ends. Included in this report are discussions on: vacuum calculations, the differential pump; front end vacuum set points; cleaning methods and agents; and continuing and completed research and development.

  16. Feedback techniques and SPS Ecloud instabilities - design estimates

    SciTech Connect

    Fox,J.D.; Mastorides, T.; Ndabashimiye, G.; Rivetta, C.; Van Winkle, D.; Byrd, J.; Vay, J-L.; Hofle, W.; Rumolo, G.; de Maria, R.

    2009-05-04

    The SPS at high intensities exhibits transverse single-bunch instabilities with signatures consistent with an Ecloud driven instability. While the SPS has a coupled-bunch transverse feedback system, control of Ecloud driven motion requires a much wider control bandwidth capable of sensing and controlling motion within each bunched beam. This paper draws beam dynamics data from the measurements and simulations of this SPS instability, and estimates system requirements for a feedback system with 2-4 GS/sec. sampling rates to damp Ecloud-driven transverse motion in the SPS at intensities desired for high-current LHC operation.

  17. Satellite Power System (SPS) financial/management scenarios

    NASA Technical Reports Server (NTRS)

    Vajk, J. P.

    1978-01-01

    The possible benefits of a Satellite Power System (SPS) program, both domestically and internationally, justify detailed and imaginative investigation of the issues involved in financing and managing such a large-scale program. In this study, ten possible methods of financing a SPS program are identified ranging from pure government agency to private corporations. The following were analyzed and evaluated: (1) capital requirements for SPS; (2) ownership and control; (3) management principles; (4) organizational forms for SPS; (5) criteria for evaluation; (6) detailed description and preliminary evaluation of alternatives; (7) phased approaches; and (8) comparative evaluation. Key issues and observations and recommendations for further study are also presented.

  18. Fibronectin Binding Proteins SpsD and SpsL Both Support Invasion of Canine Epithelial Cells by Staphylococcus pseudintermedius

    PubMed Central

    Pietrocola, Giampiero; Gianotti, Valentina; Richards, Amy; Nobile, Giulia; Geoghegan, Joan A.; Rindi, Simonetta; Monk, Ian R.; Bordt, Andrea S.; Foster, Timothy J.; Fitzgerald, J. Ross

    2015-01-01

    In this study, we investigated the cell wall-anchored fibronectin-binding proteins SpsD and SpsL from the canine commensal and pathogen Staphylococcus pseudintermedius for their role in promoting bacterial invasion of canine progenitor epidermal keratinocytes (CPEK). Invasion was examined by the gentamicin protection assay and fluorescence microscopy. An ΔspsD ΔspsL mutant of strain ED99 had a dramatically reduced capacity to invade CPEK monolayers, while no difference in the invasion level was observed with single mutants. Lactococcus lactis transformed with plasmids expressing SpsD and SpsL promoted invasion, showing that both proteins are important. Soluble fibronectin was required for invasion, and an RGD-containing peptide or antibodies recognizing the integrin α5β1 markedly reduced invasion, suggesting an important role for the integrin in this process. Src kinase inhibitors effectively blocked internalization, suggesting a functional role for the kinase in invasion. In order to identify the minimal fibronectin-binding region of SpsD and SpsL involved in the internalization process, recombinant fragments of both proteins were produced. The SpsD520–846 and SpsL538–823 regions harboring the major fibronectin-binding sites inhibited S. pseudintermedius internalization. Finally, the effects of staphylococcal invasion on the integrity of different cell lines were examined. Because SpsD and SpsL are critical factors for adhesion and invasion, blocking these processes could provide a strategy for future approaches to treating infections. PMID:26238710

  19. Fibronectin Binding Proteins SpsD and SpsL Both Support Invasion of Canine Epithelial Cells by Staphylococcus pseudintermedius.

    PubMed

    Pietrocola, Giampiero; Gianotti, Valentina; Richards, Amy; Nobile, Giulia; Geoghegan, Joan A; Rindi, Simonetta; Monk, Ian R; Bordt, Andrea S; Foster, Timothy J; Fitzgerald, J Ross; Speziale, Pietro

    2015-10-01

    In this study, we investigated the cell wall-anchored fibronectin-binding proteins SpsD and SpsL from the canine commensal and pathogen Staphylococcus pseudintermedius for their role in promoting bacterial invasion of canine progenitor epidermal keratinocytes (CPEK). Invasion was examined by the gentamicin protection assay and fluorescence microscopy. An ΔspsD ΔspsL mutant of strain ED99 had a dramatically reduced capacity to invade CPEK monolayers, while no difference in the invasion level was observed with single mutants. Lactococcus lactis transformed with plasmids expressing SpsD and SpsL promoted invasion, showing that both proteins are important. Soluble fibronectin was required for invasion, and an RGD-containing peptide or antibodies recognizing the integrin α5β1 markedly reduced invasion, suggesting an important role for the integrin in this process. Src kinase inhibitors effectively blocked internalization, suggesting a functional role for the kinase in invasion. In order to identify the minimal fibronectin-binding region of SpsD and SpsL involved in the internalization process, recombinant fragments of both proteins were produced. The SpsD520-846 and SpsL538-823 regions harboring the major fibronectin-binding sites inhibited S. pseudintermedius internalization. Finally, the effects of staphylococcal invasion on the integrity of different cell lines were examined. Because SpsD and SpsL are critical factors for adhesion and invasion, blocking these processes could provide a strategy for future approaches to treating infections.

  20. Wave Propagation Through The Far Infrared Beamline At The CLS

    SciTech Connect

    Reininger, R.; May, T.

    2004-05-12

    One of the beamlines to become operational in the first phase at the Canadian Light Source will be dedicated to high resolution spectroscopy in the far infrared (FIR). The beamline includes three ellipsoidal mirrors and several plane mirrors that transport the beam from the bending magnet source to the FIR spectrometer. The F-number of the spectrometer is matched by the beamline optics, which relay the light via intermediate foci rather than by collimation used in mid infrared beamlines. The beamline has been designed using regular ray tracing and by propagating the electric fields generated at the magnet through the beamline optics. The fields were calculated using SRW and the propagations were performed with SRW, which assumes ideal lenses, and with a wave propagating program using the real optical surfaces. The simulations, based on wave propagation, show the significant diffraction effects at both the foci and optical surfaces due to the small electron beam, beamline aperture, and mirrors sizes.

  1. Human factors design for the BMIT biomedical beamlines

    NASA Astrophysics Data System (ADS)

    Miller, C. Denise; Wysokinski, Tomasz W.; Belev, George; Chapman, L. Dean

    2013-03-01

    Operation of a biomedical beamline poses a unique set of operational and instrumentation challenges for a synchrotron facility. From proper handling and care of live animals and animal tissues, to a user community drawn primarily from the medical and veterinary realms, the work of a biomedical beamline is unique when compared to other beamlines. At the Biomedical Imaging and Therapy (BMIT) beamlines at Canadian Light Source (CLS), operation of the beamlines is geared towards our user community of medical personnel, in addition to basic science researchers. Human factors considerations have been incorporated wherever possible on BMIT, including in the design of software and hardware, as well as ease-of-use features of beamline control stations and experiment hutches. Feedback from users continues to drive usability improvements to beamline operations.

  2. Beamline Design and Instrumentation for the Imaging and Coherence Beamline I13L at the Diamond Light Source

    NASA Astrophysics Data System (ADS)

    Wagner, U. H.; Pešić, Z. D.; De Fanis, A.; Rau, C.

    2013-03-01

    I13L is a 250 m long hard x-ray beamline (6 keV to 35 keV) at the Diamond Light Source. The beamline comprises of two independent experimental endstations: one for imaging in direct space using x-ray microscopy and one for imaging in reciprocal space using coherent diffraction based imaging techniques. In this paper we will discuss the fundamental design concepts of the beamline and explain their implications for the civil engineering of the endstation building and the beamline instrumentation. For the latter this paper will focus on the beamline mirror systems and monochromators.

  3. SPS Outreach with Amusement Park Physics

    NASA Astrophysics Data System (ADS)

    Geise, Kathleen; Iona, Steven; Stencel, Robert

    2007-03-01

    The Department of Physics and Astronomy helps host an annual outreach event at a local amusement park for students in grades 6-12. The Physics Night Program is made up of several parts primarily focused on having students apply physics principles and estimate measurements at the park. That evening, DU sponsors undergraduate student volunteers in queue lines to discuss physics concepts with students, and the Society of Physics Student (SPS) chapter stages a more elaborate collection of physics demonstrations at a central gathering place. In 2006, we expanded our outreach efforts to include interactive data collection and on-site interpretation of data. A team of graduate and undergraduate DU SPS students outfitted high school volunteers with vests and hardware designed to return three-axis acceleration information. Students wore the sensors on the rides, returned the equipment to the staging area, and received immediate feedback about the accelerations their hardware recorded. We hope to expand the range of experiential sensing to include more physiological as well as physical data collection, and to provide greater accuracy utilizing the technology we are implementing at the park.

  4. F6H8 as an Intraoperative Tool and F6H8/Silicone Oil as a Postoperative Tamponade in Inferior Retinal Detachment with Inferior PVR.

    PubMed

    Tosi, Gian Marco; Marigliani, Davide; Bacci, Tommaso; Romeo, Napoleone; Balestrazzi, Angelo; Martone, Gianluca; Caporossi, Tomaso

    2014-01-01

    Purpose. To evaluate the effectiveness and safety of perfluorohexyloctane (F6H8) for intraoperative flattening of the retina and of F6H8/silicone oil (SO) 1000 cSt as a postoperative tamponade for inferior retinal detachment with inferior proliferative vitreoretinopathy. Methods. This is a retrospective review of 22 patients who underwent pars plana vitrectomy using F6H8 as an intraoperative tool to flatten the retina. At the end of the surgery a direct partial exchange between F6H8 and SO 1000 cSt was performed, tamponing the eye with different ratios of F6H8/SO (70/30, 60/40, 50/50, 40/30, and 30/70). Anatomical and functional results and complications were evaluated over the follow-up period (mean 22.63 months). Results. F6H8 was efficacious for intraoperative flattening of the retina. Twenty-one of the 22 patients achieved a complete retinal reattachment. Postoperative visual acuity (VA) ranged from light perception to 20/70, with 72% of patients obtaining VA better than 20/400. No emulsification/inflammation was observed whatever the ratio of F6H8/SO used. With higher ratios of F6H8/SO (70/30 and 60/40) cloudiness of the tamponade was observed. A transparent mixture was present with all the other ratios. Conclusions. The surgical technique adopted is very simple and safe. The optimal F6H8/SO ratio seems to be between 50/50 and 30/70.

  5. F6H8 as an Intraoperative Tool and F6H8/Silicone Oil as a Postoperative Tamponade in Inferior Retinal Detachment with Inferior PVR

    PubMed Central

    Tosi, Gian Marco; Bacci, Tommaso; Romeo, Napoleone; Balestrazzi, Angelo; Martone, Gianluca; Caporossi, Tomaso

    2014-01-01

    Purpose. To evaluate the effectiveness and safety of perfluorohexyloctane (F6H8) for intraoperative flattening of the retina and of F6H8/silicone oil (SO) 1000 cSt as a postoperative tamponade for inferior retinal detachment with inferior proliferative vitreoretinopathy. Methods. This is a retrospective review of 22 patients who underwent pars plana vitrectomy using F6H8 as an intraoperative tool to flatten the retina. At the end of the surgery a direct partial exchange between F6H8 and SO 1000 cSt was performed, tamponing the eye with different ratios of F6H8/SO (70/30, 60/40, 50/50, 40/30, and 30/70). Anatomical and functional results and complications were evaluated over the follow-up period (mean 22.63 months). Results. F6H8 was efficacious for intraoperative flattening of the retina. Twenty-one of the 22 patients achieved a complete retinal reattachment. Postoperative visual acuity (VA) ranged from light perception to 20/70, with 72% of patients obtaining VA better than 20/400. No emulsification/inflammation was observed whatever the ratio of F6H8/SO used. With higher ratios of F6H8/SO (70/30 and 60/40) cloudiness of the tamponade was observed. A transparent mixture was present with all the other ratios. Conclusions. The surgical technique adopted is very simple and safe. The optimal F6H8/SO ratio seems to be between 50/50 and 30/70. PMID:24672710

  6. Coupled Nitrification-Denitrification Caused by Suspended Sediment (SPS) in Rivers: Importance of SPS Size and Composition.

    PubMed

    Xia, Xinghui; Jia, Zhimei; Liu, Ting; Zhang, Sibo; Zhang, Liwei

    2017-01-03

    Suspended sediment (SPS) is ubiquitous in rivers, and SPS with different particle sizes and compositions may affect coupled nitrification-denitrification (CND) occurring on SPS significantly. However, there is no related research report. In this work, (15)N isotope tracer technique was adopted to explore the CND in systems containing SPS (8 g L(-1) and 1 g L(-1)) collected from the Yellow River with various particle sizes, including <2, 2-20, 20-50, 50-100, and 100-200 μm. The results showed that the CND occurred on SPS and the CND rate was negatively related to particle size; both nitrification and denitrification rate constants increased with decreasing SPS particle size. For instance, SPS (8 g L(-1)) with a particle size below 2 μm had the highest (15)N2 emission rate of 1.15 mg-N/(m(3)·d), which was 2.9 times that of 100-200 μm. This is because SPS with a smaller particle size had a larger specific surface area and a higher organic carbon content, which is beneficial for bacteria growth. Both the nitrifying and denitrifying bacteria population were positively correlated with CND rate (p < 0.05). Different from the (15)N2 production, (15)N2O emission rate did not decrease with increasing SPS particle size. For the system containing 8 g L(-1) SPS, (15)N2O emission rate reached the highest of 1.05 μg-N/(m(3)·d) in the 50-100 μm SPS system, which was 17.5 times that of 100-200 μm. Similar results could be found from the system with 1 g L(-1) SPS. This is due to the fact that the oxygen concentration at the SPS-water interface increased with SPS particle size, and the oxygen conditions might be most suitable for the production of N2O in the 50-100 μm system. This study suggests that SPS size and composition play an important role in nitrogen cycle of river systems, especially for the production of N2O.

  7. The Solar Power Satellite (SPS): Progress so far

    NASA Technical Reports Server (NTRS)

    Glaser, Peter E.

    1989-01-01

    Major developments in key Solar Power Satellite (SPS)-related technologies are outlined and the significance of these developments are evaluated considering the SPS, both as an alternate energy option for use on Earth and as a potential stimulus for space infrastructure developments and expansion of the use of extraterrestrial resources.

  8. The tomography beamline ANATOMIX at Synchrotron SOLEIL

    NASA Astrophysics Data System (ADS)

    Weitkamp, T.; Scheel, M.; Giorgetta, JL; Joyet, V.; Le Roux, V.; Cauchon, G.; Moreno, T.; Polack, F.; Thompson, A.; Samama, JP

    2017-06-01

    ANATOMIX is a 200-m-long undulator beamline for full-field tomography techniques at photon energies from 5 to 25 keV. It is currently under construction at Synchrotron SOLEIL, the French national light source near Paris. ANATOMIX will feature experimental stations both for parallel-beam microtomography (with a beam of up to 40 mm width) and for zone-plate transmission X-ray microscopy (down to pixel sizes of 30 nm) in absorption and phase contrast. The location of ANATOMIX on a canted straight section of the SOLEIL storage ring implies specific challenges for the design and operation conditions of the beamline. In this paper we present general design aspects and the status of construction.

  9. Optical design of the NSRL undulator beamline.

    PubMed

    Zhang, Y W; Sheng, L S; Zhang, G B; Gao, H

    1998-05-01

    The optical design of the NSRL undulator beamline is presented. The NSRL undulator has 29 periods of 9.2 cm that produce a photon energy of 7.7-124 eV with the fundamental and third harmonics at a ring energy of 800 MeV. The beamline consists of a typical Kirkpatrick-Baez prefocusing mirror system, a modified spherical-grating monochromator (SGM) and a refocusing toroidal mirror. The monochromator has two including angles of 148 and 157 degrees with two plane mirrors inserted into the entrance arm in order to cover the wide energy range with high grating diffraction efficiency. Calculation shows that the resolving power of the monochromator can be greater than 5000 with the slits fully opened and 20000 with a 20 micro m opening of the slits. The spot at the sample is about 1.5 (H) mm x 0.5 (V) mm.

  10. 1993 CAT workshop on beamline optical designs

    SciTech Connect

    Not Available

    1993-11-01

    An Advanced Photon Source (APS) Collaborative Access Team (CAT) Workshop on Beamline Optical Designs was held at Argonne National Laboratory on July 26--27, 1993. The goal of this workshop was to bring together experts from various synchrotron sources to provide status reports on crystal, reflecting, and polarizing optics as a baseline for discussions of issues facing optical designers for CAT beamlines at the APS. Speakers from the European Synchrotron Radiation Facility (ESRF), the University of Chicago, the National Synchrotron Light Source, and the University of Manchester (England) described single- and double-crystal monochromators, mirrors, glass capillaries, and polarizing optics. Following these presentations, the 90 participants divided into three working groups: Crystal Optics Design, Reflecting Optics, and Optics for Polarization Studies. This volume contains copies of the presentation materials from all speakers, summaries of the three working groups, and a ``catalog`` of various monochromator designs.

  11. Performance measurements at the SLS SIM beamline

    SciTech Connect

    Flechsig, U.; Nolting, F.; Fraile Rodriguez, A.; Krempasky, J.; Quitmann, C.; Schmidt, T.; Spielmann, S.; Zimoch, D.

    2010-06-23

    The Surface/Interface: Microscopy beamline of the Swiss Light Source started operation in 2001. In 2007 the beamline has been significantly upgraded with a second refocusing section and a blazed grating optimized for high photon flux. Two Apple II type undulators with a plane grating monochromator using the collimated light scheme deliver photons with an energy from 90eV to about 2keV with variable polarization for the photoemission electron microscope (PEEM) as the primary user station. We measured a focus of (45x60) {mu}m({nu}xh) and a photon flux > 10{sup 12} photon/s for all gratings. Polarization switching within a few seconds is realized with the small bandpass of the monochromator and a slight detuning of the undulator.

  12. An Updated AP2 Beamline TURTLE Model

    SciTech Connect

    Gormley, M.; O'Day, S.

    1991-08-23

    This note describes a TURTLE model of the AP2 beamline. This model was created by D. Johnson and improved by J. Hangst. The authors of this note have made additional improvements which reflect recent element and magnet setting changes. The magnet characteristics measurements and survey data compiled to update the model will be presented. A printout of the actual TURTLE deck may be found in appendix A.

  13. MUON COLLIDERS: THE ULTIMATE NEUTRINO BEAMLINES.

    SciTech Connect

    KING,B.J.

    1999-03-29

    It is shown that muon decays in straight sections of muon collider rings will naturally produce highly collimated neutrino beams that can be several orders of magnitude stronger than the beams at existing accelerators. We discuss possible experimental setups and give a very brief overview of the physics potential from such beamlines. Formulae are given for the neutrino event rates at both short and long baseline neutrino experiments in these beams.

  14. How good can our beamlines be?

    SciTech Connect

    Liebschner, Dorothee; Dauter, Miroslawa; Rosenbaum, Gerold Dauter, Zbigniew

    2012-10-01

    A repetitive measurement of the same diffraction image allows to judge the performance of a data collection facility. The accuracy of X-ray diffraction data depends on the properties of the crystalline sample and on the performance of the data-collection facility (synchrotron beamline elements, goniostat, detector etc.). However, it is difficult to evaluate the level of performance of the experimental setup from the quality of data sets collected in rotation mode, as various crystal properties such as mosaicity, non-uniformity and radiation damage affect the measured intensities. A multiple-image experiment, in which several analogous diffraction frames are recorded consecutively at the same crystal orientation, allows minimization of the influence of the sample properties. A series of 100 diffraction images of a thaumatin crystal were measured on the SBC beamline 19BM at the APS (Argonne National Laboratory). The obtained data were analyzed in the context of the performance of the data-collection facility. An objective way to estimate the uncertainties of individual reflections was achieved by analyzing the behavior of reflection intensities in the series of analogous diffraction images. The multiple-image experiment is found to be a simple and adequate method to decompose the random errors from the systematic errors in the data, which helps in judging the performance of a data-collection facility. In particular, displaying the intensity as a function of the frame number allows evaluation of the stability of the beam, the beamline elements and the detector with minimal influence of the crystal properties. Such an experiment permits evaluation of the highest possible data quality potentially achievable at the particular beamline.

  15. Nomenclature of SLC Arc beamline components

    SciTech Connect

    Silva, J.; Weng, W.T.

    1986-04-10

    This note defines I and C formal names for beamline components in the Arc as specified in the TRANSPORT decks ARCN FINAL and ARCS FINAL of June 5, 1985. The formal name consists of three fields: the primary name, the zone and the unit number. The general principles and guidelines are explained in Reference 1. The rationale and the final resolutions of the naming conventions for the Arc are explained.

  16. Shielding Calculations for NSLS-II Beamlines.

    SciTech Connect

    Job,P.K.; Casey, W.R.

    2008-04-13

    Brookhaven National Laboratory is in the process of designing a new Electron Synchrotron for scientific research using synchrotron radiation. This facility, called the 'National Synchrotron Light Source II' (NSLS-II), will provide x-ray radiation of ultra-high brightness and exceptional spatial and energy resolution. It will also provide advanced insertion devices, optics, detectors, and robotics, and a suite of scientific instruments designed to maximize the scientific output of the facility. The project scope includes the design, construction, installation, and commissioning of the following accelerators: a 200 MeV linac, a booster accelerator operating from 200 MeV to 3.0 GeV, the storage ring which stores 500 mA current of electrons at an energy of 3.0 GeV and 56 beamlines for experiments. It is planned to operate the facility primarily in a top-off mode, thereby maintaining the maximum variation in stored beam current to < 1%. Because of the very demanding requirements for beam emittance and synchrotron radiation brilliance, the beam life-time is expected to be quite low, on the order of 2 hours. Each of the 56 beamlines will be unique in terms of the source properties and configuration. The shielding designs for five representative beamlines are discussed in this paper.

  17. Upgrade of the Proton West secondary beamline

    SciTech Connect

    Spiegel, L.

    1989-10-10

    As originally designed and operated, protons entering PW6 were steered by a series of EPB dipoles into a single interaction length beryllium target, some 43 feet from the enclosure wall. Ensuing secondary beams, either p{sup +}/{pi}{sup +} or p{sup -}/{pi}{sup -}, were collected by a string of quadrupoles following the target, steered westward, away from the Proton Center line, through PW6 and PW7, and ultimately focussed on experiment production targets located within the large PW8 hall. Around the Spring of 1988 it was decided to upgrade the existing Proton West secondary beamline to allow for transport of a primary proton beam, anticipated to be either 800 or 900 GeV/c, through PW8. This upgrade project, which is now nearing completion, was largely motivated by the then recent approval of E-771, a hadronic beauty production experiment located in PW8. E-771 represents the third in a series of experiments for the large-acceptance dimuon spectrometer presently located at the end of the Proton West beamline. This Technical Memo is a summary of the upgrade --- an explanation of the underlying strategy and a documentation of the final locations of the secondary beamline elements. 6 refs., 2 figs., 2 tabs.

  18. Nqrs Data for C10H8Br4N2Sn [Br4Sn·C10H8N2] (Subst. No. 1214)

    NASA Astrophysics Data System (ADS)

    Chihara, H.; Nakamura, N.

    This document is part of Subvolume A `Substances Containing Ag … C10H15' of Volume 48 `Nuclear Quadrupole Resonance Spectroscopy Data' of Landolt-Börnstein - Group III `Condensed Matter'. It contains an extract of Section `3.2 Data tables' of the Chapter `3 Nuclear quadrupole resonance data' providing the NQRS data for C10H8Br4N2Sn [Br4Sn·C10H8N2] (Subst. No. 1214)

  19. Evaluation of basophil allergen threshold sensitivity (CD-sens) to peanut and Ara h 8 in children IgE-sensitized to Ara h 8.

    PubMed

    Glaumann, Susanne; Nilsson, Caroline; Johansson, S G O; Asarnoj, Anna; Wickman, Magnus; Borres, Magnus P; Nopp, Anna

    2015-01-01

    Diagnosing peanut allergy properly is important and can be achieved by combining clinical history with various diagnostic methods such as IgE-antibody (IgE-ab) measurements, skin-prick test, basophil allergen threshold sensitivity (CD-sens) and food challenge. We aimed to evaluate CD-sens to peanut, Ara h 8 and Gly m 4 in relation to an oral peanut challenge in children IgE-sensitized to birch, peanut and Ara h 8 avoiding peanuts. Twenty children IgE-sensitized to birch pollen and Ara h 8, but not to Ara h 1, Ara h 2 or Ara h 3 were challenged orally with roasted peanuts. Blood samples were drawn for IgE-ab and CD-sens analysis. To measure CD-sens, basophils were stimulated in vitro with decreasing doses of allergens until threshold sensitivity was reached. All children passed challenge without objective symptoms, but mild oral allergy syndrome (OAS) symptoms were reported in 6/20 children. Nineteen of twenty children were negative in CD-sens to peanut but 17/20 were positive to rAra h 8. Eleven of twenty children were positive in CD-sens to rGly m 4. Positive CD-sens to rAra h 8 show that the Ara h 8 IgE-ab sensitized basophils can be activated by a rAra h 8 allergen and initiate an allergic inflammation despite a negative challenge. Hence, children sensitized to Ara h 8 but not to peanut storage proteins may be at risk for systemic allergic reaction when eating larger amounts of peanuts but most likely don't have to fear smaller amounts.

  20. Complex transition metal hydrides incorporating ionic hydrogen: thermal decomposition pathway of Na2Mg2FeH8 and Na2Mg2RuH8.

    PubMed

    Humphries, Terry D; Matsuo, Motoaki; Li, Guanqiao; Orimo, Shin-Ichi

    2015-03-28

    Complex transition metal hydrides have potential technological application as hydrogen storage materials, smart windows and sensors. Recent exploration of these materials has revealed that the incorporation of anionic hydrogen into these systems expands the potential number of viable complexes, while varying the countercation allows for optimisation of their thermodynamic stability. In this study, the optimised synthesis of Na2Mg2TH8 (T = Fe, Ru) has been achieved and their thermal decomposition properties studied by ex situ Powder X-ray Diffraction, Gas Chromatography and Pressure-Composition Isotherm measurements. The temperature and pathway of decomposition of these isostructural compounds differs considerably, with Na2Mg2FeH8 proceeding via NaMgH3 in a three-step process, while Na2Mg2RuH8 decomposes via Mg2RuH4 in a two-step process. The first desorption maxima of Na2Mg2FeH8 occurs at ca. 400 °C, while Na2Mg2RuH8 has its first maxima at 420 °C. The enthalpy and entropy of desorption for Na2Mg2TH8 (T = Fe, Ru) has been established by PCI measurements, with the ΔHdes for Na2Mg2FeH8 being 94.5 kJ mol(-1) H2 and 125 kJ mol(-1) H2 for Na2Mg2RuH8.

  1. Candidate locations for SPS rectifying antennas

    NASA Technical Reports Server (NTRS)

    Eberhardt, A. W.

    1977-01-01

    The feasibility of placing 120 Satellite Power System (SPS) rectifying antenna (rectenna) sites across the U.S. was studied. An initial attempt is made to put two land sites in each state using several land site selection criteria. When only 69 land sites are located, it is decided to put the remaining sites in the sea and sea site selection criteria are identified. An estimated projection of electrical demand distribution for the year 2000 is then used to determine the distribution of these sites along the Pacific, Atlantic, and Gulf Coasts. A methodology for distributing rectenna sites across the country and for fine-tuning exact locations is developed, and recommendations on rectenna design and operations are made.

  2. Beamline Performance Simulations for the Fundamental Neutron Physics Beamline at the Spallation Neutron Source

    PubMed Central

    Huffman, P. R.; Greene, G. L.; Allen, R. R.; Cianciolo, V.; Huerto, R. R.; Koehler, P.; Desai, D.; Mahurin, R.; Yue, A.; Palmquist, G. R.; Snow, W. M.

    2005-01-01

    Monte Carlo simulations are being performed to design and characterize the neutron optics components for the two fundamental neutron physics beamlines at the Spallation Neutron Source. Optimization of the cold beamline includes characterization of the guides and benders, the neutron transmission through the 0.89 nm monochromator, and the expected performance of the four time-of-flight choppers. The locations and opening angles of the choppers have been studied using a simple spreadsheet-based analysis that was developed for other SNS chopper instruments. The spreadsheet parameters are then optimized using Monte Carlo techniques to obtain the results presented in this paper. Optimization of the 0.89 nm beamline includes characterizing the double crystal monochromator and the downstream guides. The simulations continue to be refined as components are ordered and their exact size and performance specifications are determined. PMID:27308115

  3. Beamline Performance Simulations for the Fundamental Neutron Physics Beamline at the Spallation Neutron Source.

    PubMed

    Huffman, P R; Greene, G L; Allen, R R; Cianciolo, V; Huerto, R R; Koehler, P; Desai, D; Mahurin, R; Yue, A; Palmquist, G R; Snow, W M

    2005-01-01

    Monte Carlo simulations are being performed to design and characterize the neutron optics components for the two fundamental neutron physics beamlines at the Spallation Neutron Source. Optimization of the cold beamline includes characterization of the guides and benders, the neutron transmission through the 0.89 nm monochromator, and the expected performance of the four time-of-flight choppers. The locations and opening angles of the choppers have been studied using a simple spreadsheet-based analysis that was developed for other SNS chopper instruments. The spreadsheet parameters are then optimized using Monte Carlo techniques to obtain the results presented in this paper. Optimization of the 0.89 nm beamline includes characterizing the double crystal monochromator and the downstream guides. The simulations continue to be refined as components are ordered and their exact size and performance specifications are determined.

  4. Discussion and improvement of the SX-700 beamline

    NASA Astrophysics Data System (ADS)

    Lu, Li-Jun; Chen, Jin-Yong

    1991-11-01

    We analyze and compare the existing designs of SX-700 beamline in this article and describe a new version of the SX-700 beamline in which we make some improvements on SX-700 designs mentioned before [1-4]. The new design uses a plane elliptical pre-mirror which deflects the SR beam vertically to compress the SR source onto the entrance slit and uses an ellipsoidal mirror to focus the monochromatized light. By proper selection of design parameters, the beamline produces non-astigmatic and nearly aberration free images like the improved SX-700 beamline by Nyholm et al. [4]. But our design has the following advantages: (1) our plane elliptical pre-mirror is much smaller, (2) an entrance slit is put in the beamline, and (3) the beamline is suitable to be installed at high energy electron storage rings.

  5. Monte Carlo simulation of the ELIMED beamline using Geant4

    NASA Astrophysics Data System (ADS)

    Pipek, J.; Romano, F.; Milluzzo, G.; Cirrone, G. A. P.; Cuttone, G.; Amico, A. G.; Margarone, D.; Larosa, G.; Leanza, R.; Petringa, G.; Schillaci, F.; Scuderi, V.

    2017-03-01

    In this paper, we present a Geant4-based Monte Carlo application for ELIMED beamline [1-6] simulation, including its features and several preliminary results. We have developed the application to aid the design of the beamline, to estimate various beam characteristics, and to assess the amount of secondary radiation. In future, an enhanced version of this application will support the beamline users when preparing their experiments.

  6. Macromolecular crystallography beamline X25 at the NSLS.

    PubMed

    Héroux, Annie; Allaire, Marc; Buono, Richard; Cowan, Matthew L; Dvorak, Joseph; Flaks, Leon; Lamarra, Steven; Myers, Stuart F; Orville, Allen M; Robinson, Howard H; Roessler, Christian G; Schneider, Dieter K; Shea-McCarthy, Grace; Skinner, John M; Skinner, Michael; Soares, Alexei S; Sweet, Robert M; Berman, Lonny E

    2014-05-01

    Beamline X25 at the NSLS is one of the five beamlines dedicated to macromolecular crystallography operated by the Brookhaven National Laboratory Macromolecular Crystallography Research Resource group. This mini-gap insertion-device beamline has seen constant upgrades for the last seven years in order to achieve mini-beam capability down to 20 µm × 20 µm. All major components beginning with the radiation source, and continuing along the beamline and its experimental hutch, have changed to produce a state-of-the-art facility for the scientific community.

  7. Macromolecular crystallography beamline X25 at the NSLS

    PubMed Central

    Héroux, Annie; Allaire, Marc; Buono, Richard; Cowan, Matthew L.; Dvorak, Joseph; Flaks, Leon; LaMarra, Steven; Myers, Stuart F.; Orville, Allen M.; Robinson, Howard H.; Roessler, Christian G.; Schneider, Dieter K.; Shea-McCarthy, Grace; Skinner, John M.; Skinner, Michael; Soares, Alexei S.; Sweet, Robert M.; Berman, Lonny E.

    2014-01-01

    Beamline X25 at the NSLS is one of the five beamlines dedicated to macromolecular crystallography operated by the Brookhaven National Laboratory Macromolecular Crystallography Research Resource group. This mini-gap insertion-device beamline has seen constant upgrades for the last seven years in order to achieve mini-beam capability down to 20 µm × 20 µm. All major components beginning with the radiation source, and continuing along the beamline and its experimental hutch, have changed to produce a state-of-the-art facility for the scientific community. PMID:24763654

  8. Satellite Power System (SPS) FY 79 program summary

    NASA Technical Reports Server (NTRS)

    1980-01-01

    The Satellite Power System (SPS) program a joint effort to develop an initial understanding of the technical feasibility, the economic practicality, and the social and environmental acceptability of the SPS concept is discussed. This is being accomplished through implementation of the Concept Development and Evaluation Program Plan which is scheduled for completion by the end of FY 1980. This Program Summary not only covers FY 1979 but includes work completed in FY 1977 and FY 1978 in order to give a comprehensive picture of the DOE involvement in the SPS concept development and evaluation process.

  9. Design requirements for orbit maintenance of SPS elements

    SciTech Connect

    Not Available

    1980-11-01

    The objective of this study is to identify the design and operational requirements that will be imposed by the need to avoid unplanned reentry of SPS elements. The LEO Staging Base, Electric Orbit Transfer Vehicle, the LEO Construction Base, and SPS Self-Power Module are the SPS elements selected for this analysis. The orbit decay rates and attitude control/orbit maintenance propellant requirements for nominal and worst case conditions are defined. The sequence of events that could cause unplanned reentry are defined. The design and operational requirements that will be used to prevent the various elements from deorbiting are defined.

  10. Satellite Power System (SPS) environmental impacts, preliminary assessment

    NASA Technical Reports Server (NTRS)

    Livingston, F. R.

    1978-01-01

    Present power plant assessment factors are used to present satellite power system (SPS) impacts. In contrast to oil, gas, nuclear and coal fueled power plants, the SPS and hydroelectric power plants produce air, water, and solid waste emissions only during the construction phase. Land use impacts result from the placement of rectennas used for microwave receiving and rectifying. Air quality impacts of the SPS resulting from the construction phase amount to 0.405 metric tons per megawatt year. Solid wastes impacts are 0.108 metric tons per year of operation. Other impacts such as those caused by heavy lift launch vehicle sites are also discussed.

  11. Functional description of APS beamline front ends

    SciTech Connect

    Kuzay, T.

    1993-02-01

    Traditional synchrotron sources were designed to produce bending magnet radiation and have proven to be an essential scientific tool. Currently, a new generation of synchrotron sources is being built that will be able to accommodate a large number of insertion device (ID) and high quality bending magnet (BM) sources. One example is the 7-GeV Advanced Photon Source (APS) now under construction at Argonne National Laboratory. The research and development effort at the APS is designed to fully develop the potential of this new generation of synchrotron sources. Of the 40 straight sections in the APS storage ring, 34 will be available for IDs. The remaining six sections are reserved for the storage ring hardware and diagnostics. Although the ring incorporates 80 BMs, only 40 of them can be used to extract radiation. The accelerator hardware shadows five of these 40 bending magnets, so the maximum number of BM sources on the lattice is 35. Generally, a photon beamline consists of four functional sections. The first section is the ID or the BM, which provides the radiation source. The second section, which is immediately outside the storage ring but inside a concrete shielding tunnel, is the front end, which is designed to control, define, and/or confine the x-ray beam. In the case of the APS, the front ends are designed to confine the photon beam. The third section, just outside the concrete shielding tunnel and on the experimental floor, is the first optics enclosure, which contains optics to filter and monochromatize the photon beam. The fourth section of a beamline consists of beam transports, additional optics, and experiment stations to do the scientific investigations. This document describes only the front ends of the APS beamlines.

  12. Functional description of APS beamline front ends

    SciTech Connect

    Kuzay, T.

    1993-02-01

    Traditional synchrotron sources were designed to produce bending magnet radiation and have proven to be an essential scientific tool. Currently, a new generation of synchrotron sources is being built that will be able to accommodate a large number of insertion device (ID) and high quality bending magnet (BM) sources. One example is the 7-GeV Advanced Photon Source (APS) now under construction at Argonne National Laboratory. The research and development effort at the APS is designed to fully develop the potential of this new generation of synchrotron sources. Of the 40 straight sections in the APS storage ring, 34 will be available for IDs. The remaining six sections are reserved for the storage ring hardware and diagnostics. Although the ring incorporates 80 BMs, only 40 of them can be used to extract radiation. The accelerator hardware shadows five of these 40 bending magnets, so the maximum number of BM sources on the lattice is 35. Generally, a photon beamline consists of four functional sections. The first section is the ID or the BM, which provides the radiation source. The second section, which is immediately outside the storage ring but inside a concrete shielding tunnel, is the front end, which is designed to control, define, and/or confine the x-ray beam. In the case of the APS, the front ends are designed to confine the photon beam. The third section, just outside the concrete shielding tunnel and on the experimental floor, is the first optics enclosure, which contains optics to filter and monochromatize the photon beam. The fourth section of a beamline consists of beam transports, additional optics, and experiment stations to do the scientific investigations. This document describes only the front ends of the APS beamlines.

  13. Isochronous Beamlines for Free Electron Lasers

    SciTech Connect

    Berz, M.

    1990-07-01

    The transport systems required to feed a beam of highly relativistic electrons into a free electron laser have to satisfy very stringent requirements with respect to isochronicity and achromaticity. In addition, the line has to be tunable to match different operating modes of the free electron laser. Various beamlines emphasizing different aspects, such as quality of isochronicity and achromaticity, simplicity of the design, and space configurations are shown and compared. Solutions are presented having time resolution in the range of 2 to less than 0.5 picoseconds for one percent of energy spread.

  14. SASE3: soft x-ray beamline at European XFEL

    NASA Astrophysics Data System (ADS)

    La Civita, Daniele; Gerasimova, Natalia; Sinn, Harald; Vannoni, Maurizio

    2014-09-01

    The European XFEL in Hamburg will be comprised of a linear accelerator and three Free-Electron-Laser beamlines (SASE1, SASE2 and SASE3) covering the energy range from 250 eV to 24 keV. It will provide up to 2700 pulses in trains of 600 microsecond duration at a repetition rate of 10 Hz. SASE3 beamline is the soft X-ray beamline (0.25 - 3 keV) and delivers photon pulses to SQS (Small Quantum System) and SCS (Spectroscopy & Coherent Scattering) experiments. The beamline is able to operate in both monochromatic and non-monochromatic mode. The latter provides the inherent FEL bandwidth at higher intensities. The beamline from photon source to experimental station is about 450 m long. The length of the beamline is related to the optics single-shotdamage issue. The almost diffraction-limited beam is propagated along the beamline with very long (up to 800 mm clear aperture), cooled (with eutectic bath) and super-polished (50 nrad RMS slope error and less than 3 nm PV residual height error) mirrors. The VLS-PG (variable line spacing - plane grating) monochromator covers the entire beamline energy range and its optical design is guided by the optimization of the energy resolving power, the minimization of the pulse broadening and the maximization of optics damage tolerance. Grating substrates are 530 mm long, eutectic cooled and present outstanding surface quality. The VLS parameters of the blazed profile are also a real challenge under manufacturing and measuring point of view. Adaptive optics in the horizontal (the second offset mirror) and vertical (monochromator premirror) plane are foreseen in the optical layout to increase the beamline tunability and to preserve the highly coherent beam properties. Beamline optical design, expected performance and also mechanical aspects of main beamline components are reported.

  15. 42 CFR 52h.8 - What are the review criteria for grants?

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... proposed research; and (h) The adequacy of the proposed protection for humans, animals, and the environment... 42 Public Health 1 2014-10-01 2014-10-01 false What are the review criteria for grants? 52h.8 Section 52h.8 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES...

  16. 42 CFR 52h.8 - What are the review criteria for grants?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... proposed research; and (h) The adequacy of the proposed protection for humans, animals, and the environment... 42 Public Health 1 2011-10-01 2011-10-01 false What are the review criteria for grants? 52h.8 Section 52h.8 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES...

  17. 42 CFR 52h.8 - What are the review criteria for grants?

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... proposed research; and (h) The adequacy of the proposed protection for humans, animals, and the environment... 42 Public Health 1 2012-10-01 2012-10-01 false What are the review criteria for grants? 52h.8 Section 52h.8 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES...

  18. 42 CFR 52h.8 - What are the review criteria for grants?

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... proposed research; and (h) The adequacy of the proposed protection for humans, animals, and the environment... 42 Public Health 1 2013-10-01 2013-10-01 false What are the review criteria for grants? 52h.8 Section 52h.8 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES...

  19. NA61/SHINE facility at the CERN SPS: beams and detector system

    NASA Astrophysics Data System (ADS)

    Abgrall, N.; Andreeva, O.; Aduszkiewicz, A.; Ali, Y.; Anticic, T.; Antoniou, N.; Baatar, B.; Bay, F.; Blondel, A.; Blumer, J.; Bogomilov, M.; Bogusz, M.; Bravar, A.; Brzychczyk, J.; Bunyatov, S. A.; Christakoglou, P.; Cirkovic, M.; Czopowicz, T.; Davis, N.; Debieux, S.; Dembinski, H.; Diakonos, F.; Di Luise, S.; Dominik, W.; Drozhzhova, T.; Dumarchez, J.; Dynowski, K.; Engel, R.; Efthymiopoulos, I.; Ereditato, A.; Fabich, A.; Feofilov, G. A.; Fodor, Z.; Fulop, A.; Gaździcki, M.; Golubeva, M.; Grebieszkow, K.; Grzeszczuk, A.; Guber, F.; Haesler, A.; Hasegawa, T.; Hierholzer, M.; Idczak, R.; Igolkin, S.; Ivashkin, A.; Jokovic, D.; Kadija, K.; Kapoyannis, A.; Kaptur, E.; Kielczewska, D.; Kirejczyk, M.; Kisiel, J.; Kiss, T.; Kleinfelder, S.; Kobayashi, T.; Kolesnikov, V. I.; Kolev, D.; Kondratiev, V. P.; Korzenev, A.; Koversarski, P.; Kowalski, S.; Krasnoperov, A.; Kurepin, A.; Larsen, D.; Laszlo, A.; Lyubushkin, V. V.; Maćkowiak-Pawłowska, M.; Majka, Z.; Maksiak, B.; Malakhov, A. I.; Maletic, D.; Manglunki, D.; Manic, D.; Marchionni, A.; Marcinek, A.; Marin, V.; Marton, K.; Mathes, H.-J.; Matulewicz, T.; Matveev, V.; Melkumov, G. L.; Messina, M.; Mrówczyński, St.; Murphy, S.; Nakadaira, T.; Nirkko, M.; Nishikawa, K.; Palczewski, T.; Palla, G.; Panagiotou, A. D.; Paul, T.; Peryt, W.; Petukhov, O.; Pistillo, C.; Płaneta, R.; Pluta, J.; Popov, B. A.; Posiadala, M.; Puławski, S.; Puzovic, J.; Rauch, W.; Ravonel, M.; Redij, A.; Renfordt, R.; Richter-Was, E.; Robert, A.; Röhrich, D.; Rondio, E.; Rossi, B.; Roth, M.; Rubbia, A.; Rustamov, A.; Rybczyński, M.; Sadovsky, A.; Sakashita, K.; Savic, M.; Schmidt, K.; Sekiguchi, T.; Seyboth, P.; Sgalaberna, D.; Shibata, M.; Sipos, R.; Skrzypczak, E.; Słodkowski, M.; Sosin, Z.; Staszel, P.; Stefanek, G.; Stepaniak, J.; Stroebele, H.; Susa, T.; Szuba, M.; Tada, M.; Tereshchenko, V.; Tolyhi, T.; Tsenov, R.; Turko, L.; Ulrich, R.; Unger, M.; Vassiliou, M.; Veberic, D.; Vechernin, V. V.; Vesztergombi, G.; Vinogradov, L.; Wilczek, A.; Włodarczyk, Z.; Wojtaszek-Szwarz, A.; Wyszyński, O.; Zambelli, L.; Zipper, W.

    2014-06-01

    NA61/SHINE (SPS Heavy Ion and Neutrino Experiment) is a multi-purpose experimental facility to study hadron production in hadron-proton, hadron-nucleus and nucleus-nucleus collisions at the CERN Super Proton Synchrotron. It recorded the first physics data with hadron beams in 2009 and with ion beams (secondary 7Be beams) in 2011. NA61/SHINE has greatly profited from the long development of the CERN proton and ion sources and the accelerator chain as well as the H2 beamline of the CERN North Area. The latter has recently been modified to also serve as a fragment separator as needed to produce the Be beams for NA61/SHINE. Numerous components of the NA61/SHINE set-up were inherited from its predecessors, in particular, the last one, the NA49 experiment. Important new detectors and upgrades of the legacy equipment were introduced by the NA61/SHINE Collaboration. This paper describes the state of the NA61/SHINE facility — the beams and the detector system — before the CERN Long Shutdown I, which started in March 2013.

  20. SPS solid state antenna power combiner

    NASA Technical Reports Server (NTRS)

    Fitzsimmons, G. W.

    1980-01-01

    Solid state dc-rf converters offer potential improvements in reliability, mass and low voltage operation, provided that anticipated efficiencies in excess of 80 percent can be realized. Field effect transistors offer the greatest potential in the SPS frequency band at 2.45 GHz. To implement this approach it is essential that means be found to sum the power of many relatively low power solid state sources in a low-loss manner, and that means be provided to properly control the phase of the outputs of the large number of solid state sources required. To avoid the power combining losses associated with circuit hybrids it was proposed that the power from multiple solid state amplifiers be combined by direct coupling of each amplifier's output to the radiating antenna structure. The selected power-combining antenna consists of a unique printed (metalized) microstrip circuit on a ceramic type dielectric substrate which is backed by a shallow lightweight aluminum cavity which sums the power of four microwave sources. The antenna behaves like two one-half wavelength slot-line antennas coupled together via their common cavity structure.

  1. First results from the SPS collider

    SciTech Connect

    Meinke, R.B.

    1982-01-01

    First results from experiment UA5 at the CERN SPS collider studying anti pp collisions at ..sqrt.. s = 540 GeV are presented. The central region pseudorapidity density is 3.0 +/- 0.1 for non-diffractive events. The FWHM of the observed pseudorapidity distribution is narrower than expected from a simple extrapolation of ISR data which can be interpreted as an increase in the mean P/sub t/ for hadron production. A value of 27.4 +/- 2.0 is obtained for the mean charged multiplicity (n/sub ch/) of produced hadrons. This is not in disagreement with an extrapolation using a quadratic fit in lns to previous lower energy data up to ISR energies, but excludes an s/sup 1/4/ or stronger dependence of (n/sub ch/) on s. Correlations between charged particles of positive and negative c.m.s. pseudorapidity have been analysed. In contrast to ISR energies, where long range correlations have been found to be small, they appear to be as important as short range correlations at collider energies. Preliminary results on correlations between charged particles and photons over a limited acceptance in the central region of pseudo-rapidity are given.

  2. SPS solid state antenna power combiner

    NASA Technical Reports Server (NTRS)

    Fitzsimmons, G. W.

    1980-01-01

    A concept for a solar power satellite antenna power combiner which utilizes solid state dc-rf converters is described. To avoid the power combining losses associated with circuit hybrids it is proposed that the power from multiple solid state amplifiers be combined by direct coupling of each amplifier's output to the radiating antenna structure. The selected power-combining antenna consists of a printed (metalized) microstrip circuit on a ceramic type dielectric substrate which is backed by a shallow lightweight aluminum cavity which sums the power of four microwave sources. The antenna behaves like two one-half wavelength slot-line antennas coupled together via their common cavity structure. A significant feature of the antenna configuration selected is that the radiated energy is summed to yield a single radiated output phase which represents the average insertion phase of the four power amplifiers. This energy may be sampled and, by comparison with the input signal, one can phase error correct to maintain the insertion phase of all solid state power combining modules at exactly the same value. This insures that the insertion phase of each SPS power combining antenna module is identical. An experiment verification program is described.

  3. SPS solid state antenna power combiner

    NASA Technical Reports Server (NTRS)

    Fitzsimmons, G. W.

    1980-01-01

    Solid state dc-rf converters offer potential improvements in reliability, mass and low voltage operation, provided that anticipated efficiencies in excess of 80 percent can be realized. Field effect transistors offer the greatest potential in the SPS frequency band at 2.45 GHz. To implement this approach it is essential that means be found to sum the power of many relatively low power solid state sources in a low-loss manner, and that means be provided to properly control the phase of the outputs of the large number of solid state sources required. To avoid the power combining losses associated with circuit hybrids it was proposed that the power from multiple solid state amplifiers be combined by direct coupling of each amplifier's output to the radiating antenna structure. The selected power-combining antenna consists of a unique printed (metalized) microstrip circuit on a ceramic type dielectric substrate which is backed by a shallow lightweight aluminum cavity which sums the power of four microwave sources. The antenna behaves like two one-half wavelength slot-line antennas coupled together via their common cavity structure.

  4. The crab cavities cryomodule for SPS test

    NASA Astrophysics Data System (ADS)

    Zanoni, C.; Amorim Carvalho, A.; Artoos, K.; Atieh, S.; Brodzinski, K.; Calaga, R.; Capatina, O.; Capelli, T.; Carra, F.; Dassa, L.; Dijoud, T.; Eiler, K.; Favre, G.; Freijedo Menendez, P.; Garlaschè, M.; Giordanino, L.; Jones, T.; E Langeslag, S. A.; Leuxe, R.; Mainaud-Durand, H.; Minginette, P.; Narduzzi, M.; Rude, V.; Sosin, M.; Swieszek, J. S.; Templeton, N.

    2017-07-01

    RF Crab Cavities are an essential part of the HL-LHC upgrade. Two concepts of such systems are being developed: the Double Quarter Wave (DQW) and the RF Dipole (RFD). A cryomodule with two DQW cavities is in advanced fabrication stage for the tests with protons in the SPS. The cavities must be operated at 2 K, without excessive heat loads, in a low magnetic environment and in compliance with CERN safety guidelines on pressure and vacuum systems. A large set of components, such as a thermal shield, a two layers magnetic shield, RF lines, helium tank and tuner are required for the successful and safe operation of the cavities. The sum of all these components with the cavities and their couplers forms the cryomodule. An overview of the design and fabrication strategy of this cryomodule is presented. The main components are described along with the present status of cavity fabrication and processing and cryomodule assembly. The lesson learned from the prototypes and first manufactured systems are also included.

  5. Information and analysis for SPS projects: Prospects and problems

    NASA Astrophysics Data System (ADS)

    Smakhtin, A. P.; Kurkin, I. I.; Rybakov, V. V.

    The paper discusses the systematic foundations and principles of elaboration of an international computer information and analysis system for Space Power System (SPS) problems. The creation of this system makes possible research on SPS projects at a rapid pace and the incorporation of more details by scientists of different professions. The computer system becomes all the more useful because information can be exchanged via Internet.

  6. Satellite Power Systems (SPS) concept definition study. Volume 2: SPS system requirements

    NASA Technical Reports Server (NTRS)

    Hanley, G.

    1978-01-01

    Collected data reflected the level of definition resulting from the evaluation of a broad spectrum of SPS (satellite power systems) concepts. As the various concepts matured, these requirements were updated to reflect the requirements identified for the projected satellite system/subsystem point design(s). The study established several candidate concepts which were presented to provide a basis for the selection of one or two approaches that would be given a more comprehensive examination. The two selected concepts were expanded and constitute the selected system point designs. The identified system/subsystem requirements was emphasized and information on the selected point design was provided.

  7. Synchrotron radiation shielding estimates for the ALS super bend beamlines

    SciTech Connect

    Donahue, R.J.; Heinzelman, K.M.

    2000-06-06

    The Advanced Light Source is proposing to replace 3 of it's bending magnets with superconducting magnets. This will substantially increase the required radiation shielding for these magnet's beamlines. In this report we outline the radiation shielding requirements for these 'superbend' beamlines.

  8. Applications of bent cylindrical mirrors to x-ray beamlines

    SciTech Connect

    Heald, S.M.

    1981-07-01

    Bent cylindrical mirrors are considered as substitutes for paraboloidal and ellipsoidal mirrors in x-ray beamlines. Analytic and raytracing studies are used to compare their optical performance with the corresponding ideal elements. Particular emphasis is placed on obtaining the practical limitations in the application of bent cylinders to typical beamline configurations.

  9. Neutral beamline with improved ion energy recovery

    DOEpatents

    Kim, Jinchoon

    1984-01-01

    A neutral beamline employing direct energy recovery of unneutralized residual ions is provided which enhances the energy recovery of the full energy ion component of the beam exiting the neutralizer cell, and thus improves the overall neutral beamline efficiency. The unneutralized full energy ions exiting the neutralizer are deflected from the beam path and the electrons in the cell are blocked by a magnetic field applied transverse to the beam direction in the neutral izer exit region. The ions which are generated at essentially ground potential and accelerated through the neutralizer cell by a negative acceleration voltage are collected at ground potential. A neutralizer cell exit end region is provided which allows the magnetic and electric fields acting on the exiting ions to be loosely coupled. As a result, the fractional energy ions exiting the cell are reflected onto and collected at an interior wall of the neutralizer formed by the modified end geometry, and thus do not detract from the energy recovery efficiency of full energy ions exiting the cell. Electrons within the neutralizer are prevented from exiting the neutralizer end opening by the action of crossed fields drift (ExB) and are terminated to a collector collar around the downstream opening of the neutralizer. The correct combination of the extended neutralizer end structure and the magnet region is designed so as to maximize the exit of full energy ions and to contain the fractional energy ions.

  10. A Remote and Virtual Synchrotron Beamline

    NASA Astrophysics Data System (ADS)

    Jackson, J. M.; Alp, E.; Sturhahn, W.

    2012-12-01

    National facilities offer one-of-a-kind opportunities to apply state-of-the-art experimental techniques to the pressing scientific problems of today. Yet, few students are able to experience research projects at national facilities due to limited accessibility caused in part by limited involvement in the local academic institution, constrained working areas at the experimental stations, and/or travel costs. We present a virtual and remote beam-line for Earth science studies using nuclear resonant and inelastic x-ray scattering methods at Sector 3 of the Advanced Photon Source at Argonne National Laboratory. Off-site students have the capability of controlling their measurements via secure internet connections and webcams. Students can access a 'view only mode' for ease of interaction and safety-control. More experienced users have exclusive control of the experiment and can remotely change variables within the experimental setup. Students may also access the virtual aspects these experiments by simulating certain conditions with our newly developed software. We evaluate such a tool by giving "before" and "after" assignments to students at different levels. These levels include high-school students from the Pasadena and greater Los Angeles area school districts, undergraduate students from Caltech's SURF/MURF program, and graduate students at Caltech. We specifically target underrepresented groups. Our results thus far show that the capabilities offered by our remote and virtual beamline show improved knowledge and understanding of applying experimental-based studies at the synchrotron to solve problems in the Earth sciences.

  11. The Infrared Microspectroscopy Beamline at CAMD

    NASA Astrophysics Data System (ADS)

    Kizilkaya, O.; Singh, V.; Desta, Y.; Pease, M.; Roy, A.; Scott, J.; Goettert, J.; Morikawa, E.; Hormes, J.; Prange, A.

    2007-01-01

    The first infrared microspectroscopy beamline at the Louisiana State University, Center for Advanced Microstructures and Devices (LSU-CAMD) has been constructed and dedicated to investigation of samples from various disciplines including chemistry, geology, biology, and material sciences. The beamline comprises a simple optical configuration. A planar and toroidal mirror pair collects 50 and 15 mrad synchrotron radiation in horizontal and vertical directions, respectively, and focuses the beam through a diamond window located outside of the shielding wall. This focus acts as a new source point for the rest of the optical systems. The synchrotron beam spot size of 35 μm and 12 μm is measured in the x and y direction of the sample stage position of the microscope. This small beam spot has a superior brightness compared to conventional IR sources and allows spatially resolved measurements with very good signal/noise ratio. Compared to a conventional thermal source, synchrotron radiation provides 30 times better intensity and a two orders of magnitude greater signal/noise ratio when measuring with microscope aperture size of 15 × 15 μm2. The results of the studies on the fungus-plant interaction with its resultant effects on the healthy leaves, and bacterial growth process in the crystallization of gordaite, a mineral, are presented.

  12. The Infrared Microspectroscopy Beamline at CAMD

    SciTech Connect

    Kizilkaya, O.; Singh, V.; Desta, Y.; Pease, M.; Roy, A.; Scott, J.; Goettert, J.; Morikawa, E.; Hormes, J.; Prange, A.

    2007-01-19

    The first infrared microspectroscopy beamline at the Louisiana State University, Center for Advanced Microstructures and Devices (LSU-CAMD) has been constructed and dedicated to investigation of samples from various disciplines including chemistry, geology, biology, and material sciences. The beamline comprises a simple optical configuration. A planar and toroidal mirror pair collects 50 and 15 mrad synchrotron radiation in horizontal and vertical directions, respectively, and focuses the beam through a diamond window located outside of the shielding wall. This focus acts as a new source point for the rest of the optical systems. The synchrotron beam spot size of 35 {mu}m and 12 {mu}m is measured in the x and y direction of the sample stage position of the microscope. This small beam spot has a superior brightness compared to conventional IR sources and allows spatially resolved measurements with very good signal/noise ratio. Compared to a conventional thermal source, synchrotron radiation provides 30 times better intensity and a two orders of magnitude greater signal/noise ratio when measuring with microscope aperture size of 15 x 15 {mu}m{sup 2}. The results of the studies on the fungus-plant interaction with its resultant effects on the healthy leaves, and bacterial growth process in the crystallization of gordaite, a mineral, are presented.

  13. The mammography project at the SYRMEP beamline.

    PubMed

    Dreossi, D; Abrami, A; Arfelli, F; Bregant, P; Casarin, K; Chenda, V; Cova, M A; Longo, R; Menk, R-H; Quai, E; Quaia, E; Rigon, L; Rokvic, T; Sanabor, D; Tonutti, M; Tromba, G; Vascotto, A; Zanconati, F; Castelli, E

    2008-12-01

    A clinical program for X-ray phase contrast (PhC) mammography with synchrotron radiation (SR) has been started in March 2006 at the SYRMEP beamline of Elettra, the SR facility in Trieste, Italy. The original beamline layout has been modified substantially and a clinical facility has been realized. In order to fulfill all security requirements, dedicated systems have been designed and implemented, following redundancy criteria and "fail safe" philosophy. Planar radiographic images are obtained by scanning simultaneously the patient and the detector through the stationary and laminar SR beam. In this first phase of the project a commercial screen-film system has been used as image receptor. Upon approval by the respective authorities, the mammography program is about half way to conclusion. Up to now about 50 patients have been examined. The patients are volunteers recruited by the radiologist after conventional examinations at the hospital resulted in an uncertain diagnosis. As an example one case of PhC SR mammography is shown and compared to conventional digital mammography. Preliminary analysis shows the high diagnostic quality of the PhC SR images that were acquired with equal or less delivered dose compared to the conventional ones.

  14. Beam characterization at the KAERI UED beamline

    NASA Astrophysics Data System (ADS)

    Setiniyaz, Sadiq; Kim, Hyun Woo; Baek, In-Hyung; Nam, Jinhee; Chae, MoonSik; Han, Byung-Heon; Gudkov, Boris; Jang, Kyu Ha; Park, Sunjeong; Jeong, Young Uk; Miginsky, Sergey; Vinokurov, Nikolay

    2016-09-01

    The UED (ultrafast electron diffraction) beamline of the KAERI's (the Korea Atomic Energy Research Institute's) WCI (World Class Institute) Center has been successfully commissioned. We have measured the beam emittance by using the quadrupole scan technique and the charge by using a novel measurement system we have developed. In the quadrupole scan, a larger drift distance between the quadrupole and the screen is preferred because it gives a better thin-lens approximation. A high bunch-charge beam, however, will undergo emittance growth in the long drift caused by the space-charge force. We present a method that mitigates this growth by introducing a quadrupole scan with a short drift and without using the thin-lens approximation. The quadrupole in this method is treated as a thick lens, and the emittance is extracted by using the thick-lens equations. Apart from being precise, our method can be readily applied without making any change to the beamline and has no need for a big drift space. For charge measurement, we have developed a system consisting of an in-air Faraday cup (FC) and a preamplifier. Tests performed utilizing 3.3-MeV electrons show that the system was able to measure bunches with pulse durations of tens of femtoseconds at 10 fC sensitivity.

  15. The ACCM Beamlines For Bioscience Studies

    NASA Astrophysics Data System (ADS)

    Ma, C. I.; Chang, S. H.; Liu, C. Y.; Juang, J. M.; Chang, C. H.; Tsang, K. L.

    2007-01-01

    To meet the increasing demand of X-ray beamlines for bioscience research, we have designed two high-performance, side-branch, asymmetric-cut curved crystal monochromator (ACCM) beamlines to fully utilize the sideway output of the superconducting wiggler SW6 at NSRRC. Each of these two beamlines (BL13A and BL13C) collects 1 mrad of the radiation fan in the horizontal direction, one centered at 3 mrad and the other at 4 mrad away from the central line of the wiggler output. The newly designed ACCMs are capable of energy scanning from 12 keV to 14 keV and offer good performances in terms of flux, resolution and stability. The ACCMs are designed and built in-house, combining efficient cooling and bending mechanisms in a compact unit that allows precise adjustments on a goniometer assembly. The bender is specially designed with symmetrically driven piezo-actuators that minimize center displacement during bending. Both direct and indirect cooling methods were tested; the former using Ga/In directly under the beam footprint and the latter using both sides of the crystal clamping area for cooling. Performance of the beamlines employing both cooling methods has been measured. The indirect cooling method provides 4.9 × 1010 photons/sec through a pair of 100 μm slits (H × V) with energy resolution of 5.3 × 10-3 (ΔE/E) at 12.7 keV. Higher energy resolution in the 10-4 range can be achieved by adjusting the horizontal source fan or the crystal radius at the expense of flux. The direct cooling method provides 1.4 × 1010 photons/sec through a pair of 100 μm slits (H × V) with energy resolution of 1.2 × 10-3 (ΔE/E) at 12.7 keV. The FWHM of the focused beam profile in the indirect cooling mode is 800 × 109 μm (H × V), and 800 × 283 μm (H × V) in the direct cooling mode with some horizontal tail, the latter being larger due to influence of the Ga/In layer on the crystal shape. Cooling efficiency is excellent in the direct cooling mode, in which the performance

  16. Photon beamline frontends for the PETRA III extension project

    SciTech Connect

    Schulte-Schrepping, H. Hesse, M.; Degenhardt, M.; Krüger, H.; Peters, R.; Peters, H. B.; Steffen, B.

    2016-07-27

    The photon beamline frontend design for the new insertion device (ID) beamlines of the PETRA III extension project will be presented. The design is based on the concepts developed for the photon beamline frontends at PETRA III. This generic design approach minimized the number of specialized components for all beamlines. The girder concept with kinematic mounts at each girder allowed a fast and reliable installation phase. The extension beamlines are located in two new additional buildings. There will be 4 sectors with two undulator IDs in each sector with a canting angle of 20 mrad between the insertion devices. Additionally, two straight sections and a bending magnet chamber will be modified: one straight section will be transformed to a side station sector, the straight section with the 40 m long damping wiggler will be used as a hard X-ray source, and the bending magnet will serve as a soft-X-ray source.

  17. G4beamline Particle Tracking in Matter Dominated Beam Lines

    SciTech Connect

    T.J. Roberts, K.B. Beard, S. Ahmed, D. Huang, D.M. Kaplan

    2011-03-01

    The G4beamline program is a useful and steadily improving tool to quickly and easily model beam lines and experimental equipment without user programming. It has both graphical and command-line user interfaces. Unlike most accelerator physics codes, it easily handles a wide range of materials and fields, being particularly well suited for the study of muon and neutrino facilities. As it is based on the Geant4 toolkit, G4beamline includes most of what is known about the interactions of particles with matter. We are continuing the development of G4beamline to facilitate its use by a larger set of beam line and accelerator developers. A major new feature is the calculation of space-charge effects. G4beamline is open source and freely available at http://g4beamline.muonsinc.com

  18. C3H8 and C3H4 in Titan's atmosphere

    NASA Technical Reports Server (NTRS)

    Maguire, W. C.; Hanel, R. A.; Jennings, D. E.; Kunde, V. G.; Samuelson, R. E.

    1981-01-01

    Four bands of propane C3H8 and two of methyl acetylene C3H4 have been identified in the Voyager IR spectrum of Titan. Stratospheric abundances of 2 x 10 to the -5 for C3H8 and 3 x 10 to the -8 for C3H4 have been determined for the mid-latitude region. A feature at 1,154/cm, previously assigned solely to CH3D, is now identified at least in part due to C3H8.

  19. An elliptical wiggler beamline for the ALS

    SciTech Connect

    Martynov, V.V. |; McKinney, W.R.; Padmore, H.A.

    1995-10-01

    A beamline for circularly polarized radiation produced by an elliptical wiggler has been designed at the ALS covering the broad energy range from 50 eV to 2000 eV. The rigorous theory of grating diffraction efficiency has been used to maximize transmitted flux. The nature of the elliptical wiggler insertion device creates a challenging optical problem due to the large source size in the vertical and horizontal directions. The requirement of high resolving power, combined with the broad tuning range and high heat loads complicate the design. These problems have been solved by using a variable included angle monochromator of the ``constant length`` type with high demagnification onto its entrance slit, and cooled optics.

  20. Mirrors for synchrotron-radiation beamlines

    SciTech Connect

    Howells, M.R.

    1993-09-01

    The authors consider the role of mirrors in synchrotron-radiation beamlines and discuss the optical considerations involved in their design. They discuss toroidal, spherical, elliptical, and paraboloidal mirrors in detail with particular attention to their aberration properties. They give a treatment of the sine condition and describe its role in correcting the coma of axisymmetric systems. They show in detail how coma is inevitable in single-reflection, grazing-incidence systems but correctable in two-reflection systems such as those of the Wolter type. In an appendix, they give the theory of point aberrations of reflectors of a general shape and discuss the question of correct naming of aberrations. In particular, a strict definition of coma is required if attempts at correction are to be based on the sine condition.

  1. Thermolysis and solid state NMR studies of NaB3H8, NH3B3H7, and NH4B3H8.

    PubMed

    Huang, Zhenguo; Eagles, Mitch; Porter, Spencer; Sorte, Eric G; Billet, Beau; Corey, Robert L; Conradi, Mark S; Zhao, Ji-Cheng

    2013-01-21

    In an effort to broaden the search for high-capacity hydrogen storage materials, three triborane compounds, NaB(3)H(8), NH(3)B(3)H(7), and NH(4)B(3)H(8), were studied. In addition to hydrogen, thermal decomposition also releases volatile boranes, and the relative amounts and species depend on the cations (Na(+), NH(4)(+)) and the Lewis base (NH(3)). Static-sample hydrogen NMR is used to probe molecular motion in the three solids. In each case, the line width decreases from low temperatures to room temperature in accordance with a model of isotropic or nearly isotropic reorientations. Such motions also explain a deep minimum in the relaxation time T(1). Translational diffusion never appears to be rapid on the 10(-5) s time scale of NMR.

  2. Present status of SPring-8 macromolecular crystallography beamlines

    SciTech Connect

    Kawano, Yoshiaki; Hirata, Kunio; Ueno, Go; Hikima, Takaaki; Murakami, Hironori; Maeda, Daisuke; Nisawa, Atsushi; Yamamoto, Masaki; Shimizu, Nobutaka; Baba, Seiki; Hasegawa, Kazuya; Makino, Masatomo; Mizuno, Nobuhiro; Hoshino, Takeshi; Ito, Ren; Wada, Izumi; Kumasaka, Takashi

    2010-06-23

    Seven beamlines are operated for macromolecular crystallography (MX) at SPring-8. The three undulator beamlines are developed for cutting edge target and four bending-magnet beamlines are developed for high throughput MX. The undulator beamline, BL41XU that provides the most brilliant beam, is dedicated to obtain high quality data even from small-size and weakly-diffracting crystals. The minimum beam size at sample position is achieved to 10 {mu}m diameter using a pin-hole collimator. Its photon flux at wavelength {lambda} = 1.0 A is 2.8x10{sup 11} photons/sec. This small beam coupled with irradiation point scanning method is quite useful to take diffraction dataset from small crystals by suppressing the radiation damage. These advanced technologies made a number of difficult protein structure analysis possible, (i.e. Sodium-potassium ATPase). The bending-magnet beamlines BL26B1/B2 and BL38B1 provide automatic data collection exploiting the high mobility of the beam. The beamline operation software 'BSS', sample auto-changer 'SPACE' and web-based data management software 'D-Cha' have made the automatic data collection possible. The 'Mail-in data collection system' that accepts distant users samples via courier service have made users possible to collect diffraction data without visiting SPring-8. The structural genomics research is promoted by these beamlines.

  3. Present status of SPring-8 macromolecular crystallography beamlines

    NASA Astrophysics Data System (ADS)

    Kawano, Yoshiaki; Shimizu, Nobutaka; Baba, Seiki; Hasegawa, Kazuya; Makino, Masatomo; Mizuno, Nobuhiro; Hoshino, Takeshi; Ito, Ren; Wada, Izumi; Hirata, Kunio; Ueno, Go; Hikima, Takaaki; Murakami, Hironori; Maeda, Daisuke; Nisawa, Atsushi; Kumasaka, Takashi; Yamamoto, Masaki

    2010-06-01

    Seven beamlines are operated for macromolecular crystallography (MX) at SPring-8. The three undulator beamlines are developed for cutting edge target and four bending-magnet beamlines are developed for high throughput MX. The undulator beamline, BL41XU that provides the most brilliant beam, is dedicated to obtain high quality data even from small-size and weakly-diffracting crystals. The minimum beam size at sample position is achieved to 10 μm diameter using a pin-hole collimator. Its photon flux at wavelength λ = 1.0 Å is 2.8×1011 photons/sec. This small beam coupled with irradiation point scanning method is quite useful to take diffraction dataset from small crystals by suppressing the radiation damage. These advanced technologies made a number of difficult protein structure analysis possible, (i.e. Sodium-potassium ATPase). The bending-magnet beamlines BL26B1/B2 and BL38B1 provide automatic data collection exploiting the high mobility of the beam. The beamline operation software "BSS," sample auto-changer "SPACE" and web-based data management software "D-Cha" have made the automatic data collection possible. The "Mail-in data collection system" that accepts distant users samples via courier service have made users possible to collect diffraction data without visiting SPring-8. The structural genomics research is promoted by these beamlines.

  4. SPS Intern Contributions to ComPADRE and SOCK

    NASA Astrophysics Data System (ADS)

    Zaunbrecher, Katherine N.

    2006-12-01

    This summer I interned with the Society of Physics Students (SPS), developing 1) on-line resources for undergraduate physics majors and 2) an outreach tool for local SPS chapters. ComPADRE, digital resources for physics and astronomy education, is sponsored by NSF. The Nucleus is a part of the ComPADRE collection specifically for undergraduate students. It provides scholarship and summer research clearinghouses, as well as a discussion forum, monthly contests, and more. This summer was spent developing the new student lounge, which is now a part of the Nucleus, expanding the clearinghouses, and developing new contests and polls. The SOCK, or SPS Outreach Catalyst Kit, is a catalyst that is available for SPS chapters who are interested in doing outreach but who may not know where to begin. The 2006 SOCK was developed this summer by the SPS Interns based on temperature, in conjunction with the Absolute Zero Campaign. The materials included in the kit were chosen based on their potential to engage students in the classroom. Sponsored by Jack Hehn of AIP.

  5. Preliminary materials assessment for the Satellite Power System (SPS)

    SciTech Connect

    Teeter, R.R.; Jamieson, W.M.

    1980-01-01

    Presently, there are two SPS reference design concepts (one using silicon solar cells; the other using gallium arsenide solar cells). A materials assessment of both systems was performed based on the materials lists set forth in the DOE/NASA SPS Reference System Report: Concept Development and Evaluation Program. This listing identified 22 materials (plus miscellaneous and organics) used in the SPS. Tracing the production processes for these 22 materials, a total demand for over 20 different bulk materials (copper, silicon, sulfuric acid, etc.) and nealy 30 raw materials (copper ore, sand, sulfur ore, etc.) was revealed. Assessment of these SPS material requirements produced a number of potential material supply problems. The more serious problems are those associated with the solar cell materials (gallium, gallium arsenide, sapphire, and solar grade silicon), and the graphite fiber required for the satellite structure and space construction facilities. In general, the gallium arsenide SPS option exhibits more serious problems than the silicon option, possibly because gallium arsenide technology is not as well developed as that for silicon. Results are presented and discussed in detail. (WHK)

  6. 'SPS 2000' - A commercial SPS test-bed for electric utilities

    NASA Astrophysics Data System (ADS)

    Collins, P. Q.; Tomkins, R.; Nagatomo, M.

    There is very little firm information of the kind that utilities need to assess solar power stations (SPSs) as possible candidates for investment. The SPS 2000 project is designed to provide such information. It comprises a space segment in low earth equatorial orbit transmitting photovoltaic-generated microwave power to one or more rectifying antennas on the equator. These will receive 1-10 MW of power during each satellite pass, enabling utilities to perform several experiments each day on many different technical and economic aspects of the system's operation. The results will help utilities to calculate the prices that they could profitably offer to satellite operators for commercial supplies of microwave power delivered from space to given specifications.

  7. Final report of the SPS space transportation workshop

    SciTech Connect

    Not Available

    1980-10-01

    After a brief description of space power system concepts and the current status of the SPS program, issues relevant to earth-surface-to-low-earth-orbit (ESLEO) and orbit-to-orbit transport are discussed. For ESLEO, vehicle concepts include shuttle transportation systems, heavy lift launch vehicles, and single-stage-to-orbit vehicles. Orbit transfer vehicle missions include transport of cargo and the SPS module from low earth orbit to geosynchronous earth orbit as well as personnel transport. Vehicles discussed for such missions include chemical rocket orbital transfer vehicles, and electric orbital transfer vehicles. Further discussions include SPS station-keeping and attitude control, intra-orbit transport, and advanced propulsion and vehicle concepts. (LEW)

  8. Some questions and answers about the Satellite Power System (SPS)

    SciTech Connect

    Not Available

    1980-01-01

    The Office of Energy Research, US DOE is evaluating the concept of obtaining significant amounts of electrical energy from space through the Satellite Power System Project Office (SPS PO) formed for that purpose. The SPS PO prepared and is implementing a Concept Development and Evaluation Program plan. The CDEP runs roughly three years (from July 1977 through July 1980) and consists of four primary elements: (1) Systems Definition, (2) Environmental Assessment, (3) Societal Assessment, and (4) Comparative Assessment. One facet of the Societal Assessment is an investigation of public concerns. To further this investigation, a public outreach experiment was initiated to determine the initial response of three selected interest groups to the SPS, both qualitatively and quantititavely, and to gain some experience for use in future public participation activities. Three groups were contacted and agreed to participate in the experiment. They were: the Citizens Energy Project (CEP), the Forum for the Advancement of Students in Science and Technology (FASST), and the L-5 Society (L-5). They each agreed to condense twenty final SPS reports into approximately four pages each, have them typeset, printed and distributed to 3,000 of their constituents for their review, together with a request that they respond to the parent organization regarding the information presented. All responses were summarized and provided to Planning Research Corporation who then solicited the answers from the SPS PO investigator most directly concerned.The questions and answers are presented and will be distributed by the three groups to the individual respondents. Each of the three groups is also preparing a report to the Project Office detailing their work and results. These, together with other responses and studies will be used to more effectively involve the public in the SPS Participatory Technology Process.

  9. Optical pseudomotors for soft x-ray beamlines

    SciTech Connect

    Pedreira, P. Sics, I.; Sorrentino, A.; Pereiro, E.; Aballe, L.; Foerster, M.; Pérez-Dieste, V.; Escudero, C.; Nicolas, J.

    2016-05-15

    Optical elements of soft x-ray beamlines usually have motorized translations and rotations that allow for the fine alignment of the beamline. This is to steer the photon beam at some positions and to correct the focus on slits or on sample. Generally, each degree of freedom of a mirror induces a change of several parameters of the beam. Inversely, several motions are required to actuate on a single optical parameter, keeping the others unchanged. We define optical pseudomotors as combinations of physical motions of the optical elements of a beamline, which allow modifying one optical parameter without affecting the others. We describe a method to obtain analytic relationships between physical motions of mirrors and the corresponding variations of the beam parameters. This method has been implemented and tested at two beamlines at ALBA, where it is used to control the focus of the photon beam and its position independently.

  10. Moly99 Production Facility: Report on Beamline Components, Requirements, Costs

    SciTech Connect

    Bishofberger, Kip A.

    2015-12-23

    In FY14 we completed the design of the beam line for the linear accelerator production design concept. This design included a set of three bending magnets, quadrupole focusing magnets, and octopoles to flatten the beam on target. This design was generic and applicable to multiple different accelerators if necessary. In FY15 we built on that work to create specifications for the individual beam optic elements, including power supply requirements. This report captures the specification of beam line components with initial cost estimates for the NorthStar production facility.This report is organized as follows: The motivation of the beamline design is introduced briefly, along with renderings of the design. After that, a specific list is provided, which accounts for each beamline component, including part numbers and costs, to construct the beamline. After that, this report details the important sections of the beamline and individual components. A final summary and list of follow-on activities completes this report.

  11. A hard X-ray nanoprobe beamline for nanoscale microscopy

    PubMed Central

    Winarski, Robert P.; Holt, Martin V.; Rose, Volker; Fuesz, Peter; Carbaugh, Dean; Benson, Christa; Shu, Deming; Kline, David; Stephenson, G. Brian; McNulty, Ian; Maser, Jörg

    2012-01-01

    The Hard X-ray Nanoprobe Beamline (or Nanoprobe Beamline) is an X-ray microscopy facility incorporating diffraction, fluorescence and full-field imaging capabilities designed and operated by the Center for Nanoscale Materials and the Advanced Photon Source at Sector 26 of the Advanced Photon Source at Argonne National Laboratory. This facility was constructed to probe the nanoscale structure of biological, environmental and material sciences samples. The beamline provides intense focused X-rays to the Hard X-ray Nanoprobe (or Nanoprobe) which incorporates Fresnel zone plate optics and a precision laser sensing and control system. The beamline operates over X-ray energies from 3 to 30 keV, enabling studies of most elements in the periodic table, with a particular emphasis on imaging transition metals. PMID:23093770

  12. Status of the crystallography beamlines at PETRA III

    NASA Astrophysics Data System (ADS)

    Burkhardt, Anja; Pakendorf, Tim; Reime, Bernd; Meyer, Jan; Fischer, Pontus; Stübe, Nicolas; Panneerselvam, Saravanan; Lorbeer, Olga; Stachnik, Karolina; Warmer, Martin; Rödig, Philip; Göries, Dennis; Meents, Alke

    2016-03-01

    Since 2013, three beamlines for macromolecular crystallography are available to users at the third-generation synchrotron PETRA III in Hamburg: P11, P13 and P14, the latter two operated by EMBL. Beamline P11 is operated by DESY and is equipped with a Pilatus 6M detector. Together with the photon flux of 2× 10^{13} ph/s provided by the very brilliant X-ray source of PETRA III, a full data set can be typically collected in less than 2min. P11 provides state-of-the-art microfocusing capabilities with beam sizes down to 1× 1 μ m2, which makes the beamline ideally suited for investigation of microcrystals and serial crystallography experiments. An automatic sample changer allows fast sample exchange in less than 20s, which enables high-throughput crystallography and fast crystal screening. For sample preparation, an S2 biosafety laboratory is available in close proximity to the beamline.

  13. SPS market analysis. [small solar thermal power systems

    NASA Technical Reports Server (NTRS)

    Goff, H. C.

    1980-01-01

    A market analysis task included personal interviews by GE personnel and supplemental mail surveys to acquire statistical data and to identify and measure attitudes, reactions and intentions of prospective small solar thermal power systems (SPS) users. Over 500 firms were contacted, including three ownership classes of electric utilities, industrial firms in the top SIC codes for energy consumption, and design engineering firms. A market demand model was developed which utilizes the data base developed by personal interviews and surveys, and projected energy price and consumption data to perform sensitivity analyses and estimate potential markets for SPS.

  14. Solar Power Satellite (SPS) solid-state antenna power combiner

    NASA Technical Reports Server (NTRS)

    1980-01-01

    A low loss power-combining microstrip antenna suitable for solid state solar power satellite (SPS) application was developed. A unique approach for performing both the combining and radiating function in a single cavity-type circuit was verified, representing substantial refinements over previous demonstration models in terms of detailed geometry to obtain good matching and adequate bandwidth at the design frequency. The combiner circuit was designed, built, and tested and the overall results support the view that the solid state power-combining antenna approach is a viable candidate for a solid state SPS antenna building block.

  15. Satellite Power System (SPS) magnetron tube assessment study

    NASA Technical Reports Server (NTRS)

    Brown, W. C.

    1981-01-01

    The data base was extended with respect to the magnetron directional amplifier and its operating parameters that are pertinent to its application in the solar power satellite. On the basis of the resulting extended data base the design of a magnetron was outlined that would meet the requirements of the SPS application and a technology program was designed that would result in its development. The proposed magnetron design for the SPS is a close scale of the microwave oven magnetron, and resembles it closely physically and electrically.

  16. Circular dichroism beamline B23 at the Diamond Light Source.

    PubMed

    Hussain, Rohanah; Jávorfi, Tamás; Siligardi, Giuliano

    2012-01-01

    Synchrotron radiation circular dichroism (SRCD) is a well established technique in structural biology. The first UV-VIS beamline, dedicated to circular dichroism, at Diamond Light Source Ltd, a third-generation synchrotron facility in south Oxfordshire, UK, has recently become operational and it is now available for the user community. Herein the main characteristics of the B23 SRCD beamline, the ancillary facilities available for users, and some of the recent advances achieved are summarized.

  17. Experimental stations at I13 beamline at Diamond Light Source

    NASA Astrophysics Data System (ADS)

    Pešić, Z. D.; De Fanis, A.; Wagner, U.; Rau, C.

    2013-03-01

    The I13 beamline of Diamond Light Source has been operational since December 2011. The beamline encompass two fully independent branches devoted to coherent imaging experiments (coherent x-ray diffraction, coherent diffraction imaging and ptychography) and x-ray imaging (in-line phase contrast imaging, tomography and full-field microscopy). This paper gives an overview of the current status of experimental stations on both branches and outlines planned developments.

  18. A new Mtest beamline for the 1999 fixed target run

    SciTech Connect

    C. N. Brown and T. R. Kobilarcik

    2000-05-18

    The beamline cryogenic system for the Meson area will not be run for the 1999 fixed target run. The current MTest (MT) beamline relies on cryogenic magnets. A non-cryogenic solution is proposed which can yield up to 1 x 10{sup 6} pions per cycle at 120 GeV/c per 1 x 10{sup 11} incident protons at 800 GeV/c.

  19. New Large Volume Press Beamlines at the Canadian Light Source

    NASA Astrophysics Data System (ADS)

    Mueller, H. J.; Hormes, J.; Lauterjung, J.; Secco, R.; Hallin, E.

    2013-12-01

    The Canadian Light Source, the German Research Centre for Geosciences and the Western University recently agreed to establish two new large volume press beamlines at the Canadian Lightsource. As the first step a 250 tons DIA-LVP will be installed at the IDEAS beamline in 2014. The further development is associated with the construction of a superconducting wiggler beamline at the Brockhouse sector. A 1750 tons DIA LVP will be installed there about 2 years later. Up to the completion of this wiggler beamline the big press will be used for offline high pressure high temperature experiments under simulated Earth's mantle conditions. In addition to X-ray diffraction, all up-to-date high pressure techniques as ultrasonic interferometry, deformation analyses by X-radiography, X-ray densitometry, falling sphere viscosimetry, multi-staging etc. will be available at both beamlines. After the required commissioning the beamlines will be open to the worldwide user community from Geosciences, general material sciences, physics, chemistry, biology etc. based on the evaluation and ranking of the submitted user proposals by an international review panel.

  20. The ecological situation and C.I.S. scientists' work on the SPS problem

    NASA Astrophysics Data System (ADS)

    Prisniakov, V.

    A brief historical perspective of the former USSR and current Confederation of Independent States (CIS) research and development activities relating to the Solar Power Satellite (SPS) concept is presented. Particular emphasis is on the ecological aspects of the SPS concept.

  1. From Beamline to Scanner with 225Ac

    NASA Astrophysics Data System (ADS)

    Robertson, Andrew K. H.; Ramogida, Caterina F.; Kunz, Peter; Rodriguez-Rodriguez, Cristina; Schaffer, Paul; Sossi, Vesna

    2016-09-01

    Due to the high linear energy transfer and short range of alpha-radiation, targeted radiation therapy using alpha-emitting pharmaceuticals that successfully target small disease clusters will kill target cells with limited harm to healthy tissue, potentially treating the most aggressive forms of cancer. As the parent of a decay chain with four alpha- and two beta-decays, 225Ac is a promising candidate for such a treatment. However, this requires retention of the entire decay chain at the target site, preventing the creation of freely circulating alpha-emitters that reduce therapeutic effect and increase toxicity to non-target tissues. Two major challenges to 225Ac pharmaceutical development exist: insufficient global supply, and the difficulty of preventing toxicity by retaining the entire decay chain at the target site. While TRIUMF works towards large-scale (C i amounts) production of 225Ac, we already use our Isotope Separation On-Line facility to provide small (< 1 mCi) quantities for in-house chemistry and imaging research that aims to improve and assess 225Ac radiopharmaceutical targeting. This presentation provides an overview of this research program and the journey of 225Ac from the beamline to the scanner. This research is funded by the Natural Sciences and Engineering Research Council of Canada.

  2. Design of the LBNF Beamline Target Station

    SciTech Connect

    Tariq, S.; Ammigan, K.; Anderson, K.; Buccellato, S. A.; Crowley, C. F.; Hartsell, B. D.; Hurh, P.; Hylen, J.; Kasper, P.; Krafczyk, G. E.; Lee, A.; Lundberg, B.; Reitzner, S. D.; Sidorov, V.; Stefanik, A. M.; Tropin, I. S.; Vaziri, K.; Williams, K.; Zwaska, R. M.; Densham, C.

    2016-10-01

    The Long Baseline Neutrino Facility (LBNF) project will build a beamline located at Fermilab to create and aim an intense neutrino beam of appropriate energy range toward the DUNE detectors at the SURF facility in Lead, South Dakota. Neutrino production starts in the Target Station, which consists of a solid target, magnetic focusing horns, and the associated sub-systems and shielding infrastructure. Protons hit the target producing mesons which are then focused by the horns into a helium-filled decay pipe where they decay into muons and neutrinos. The target and horns are encased in actively cooled steel and concrete shielding in a chamber called the target chase. The reference design chase is filled with air, but nitrogen and helium are being evaluated as alternatives. A replaceable beam window separates the decay pipe from the target chase. The facility is designed for initial operation at 1.2 MW, with the ability to upgrade to 2.4 MW, and is taking advantage of the experience gained by operating Fermilab’s NuMI facility. We discuss here the design status, associated challenges, and ongoing R&D and physics-driven component optimization of the Target Station.

  3. Beamline Insertions Manager at Jefferson Lab

    SciTech Connect

    Johnson, Michael C.

    2015-09-01

    The beam viewer system at Jefferson Lab provides operators and beam physicists with qualitative and quantitative information on the transverse electron beam properties. There are over 140 beam viewers installed on the 12 GeV CEBAF accelerator. This paper describes an upgrade consisting of replacing the EPICS-based system tasked with managing all viewers with a mixed system utilizing EPICS and high-level software. Most devices, particularly the beam viewers, cannot be safely inserted into the beam line during high-current beam operations. Software is partly responsible for protecting the machine from untimely insertions. The multiplicity of beam-blocking and beam-vulnerable devices motivates us to try a data-driven approach. The beamline insertions application components are centrally managed and configured through an object-oriented software framework created for this purpose. A rules-based engine tracks the configuration and status of every device, along with the beam status of the machine segment containing the device. The application uses this information to decide on which device actions are allowed at any given time.

  4. FLASH2: Operation, beamlines, and photon diagnostics

    SciTech Connect

    Plönjes, Elke Faatz, Bart; Kuhlmann, Marion; Treusch, Rolf

    2016-07-27

    FLASH2, a major extension of the soft X-ray free-electron laser FLASH at DESY, turns FLASH into a multi-user FEL facility. A new undulator line is located in a separate accelerator tunnel and driven additionally by the FLASH linear accelerator. First lasing of FLASH2 was achieved in August 2014 with simultaneous user operation at FLASH1. The new FLASH2 experimental hall offers space for up to six experimental end stations, some of which will be installed permanently. The wide wavelength range spans from 4-60 nm and 0.8 nm in the 5{sup th} harmonic and in the future deep into the water window in the fundamental. While this is of high interest to users, it is challenging from the beamline instrumentation point of view. Online diagnostics - which are mostly pulse resolved - for beam intensity, position, wavelength, wave front, and pulse length have been to a large extent developed at FLASH(1) and have now been optimized for FLASH2. Pump-probe facilities for XUV-XUV, XUV optical and XUV-THz experiments will complete the FLASH2 user facility.

  5. Status of the LBNE Neutrino Beamline

    SciTech Connect

    Papadimitriou, Vaia; /Fermilab

    2011-12-01

    The Long Baseline Neutrino Experiment (LBNE) will utilize a neutrino beamline facility located at Fermilab to carry out a compelling research program in neutrino physics. The facility will aim a beam of neutrinos toward a detector placed at the Homestake Mine in South Dakota. The neutrinos are produced in a three-step process. First, protons from the Main Injector (60-120 GeV) hit a solid target and produce mesons. Then, the charged mesons are focused by a set of focusing horns into the decay pipe, towards the far detector. Finally, the mesons that enter the decay pipe decay into neutrinos. The parameters of the facility were determined taking into account several factors including the physics goals, the Monte Carlo modeling of the facility, spacial and radiological constraints and the experience gained by operating the NuMI facility at Fermilab. The initial beam power is expected to be {approx}700 kW, however some of the parameters were chosen to be able to deal with a beam power of 2.3 MW. We discuss here the status of the conceptual design and the associated challenges.

  6. ALS beamlines for independent investigators: A summary of the capabilities and characteristics of beamlines at the ALS

    SciTech Connect

    Not Available

    1992-08-01

    There are two mods of conducting research at the ALS: To work as a member of a participating research team (PRT). To work as a member of a participating research team (PRT); to work as an independent investigator; PRTs are responsible for building beamlines, end stations, and, in some cases, insertion devices. Thus, PRT members have privileged access to the ALS. Independent investigators will use beamline facilities made available by PRTs. The purpose of this handbook is to describe these facilities.

  7. ALS beamlines for independent investigators: A summary of the capabilities and characteristics of beamlines at the ALS

    SciTech Connect

    Not Available

    1992-08-01

    There are two mods of conducting research at the ALS: To work as a member of a participating research team (PRT). To work as a member of a participating research team (PRT); to work as an independent investigator; PRTs are responsible for building beamlines, end stations, and, in some cases, insertion devices. Thus, PRT members have privileged access to the ALS. Independent investigators will use beamline facilities made available by PRTs. The purpose of this handbook is to describe these facilities.

  8. Preliminary environmental assessment for the satellite power system (SPS)

    SciTech Connect

    Not Available

    1981-01-01

    The health, safety, and environmental impacts of collecting solar energy in space, converting it to microwave energy, transmitting a microwave beam to earth, and then converting the microwave power to electricity are discussed in this article. The SPS microwave power transmission system would generally expose people and the environment to low levels of microwave radiation. There is evidence that microwave radiation can effect the immune and blood systems of animals if the rate of heat absorbed exceeds the animal's basal metabolic rate. It can also produce structural changes in the genes if the intensity is such that cells are substantially heated. Data regarding the cancer-producing potential of microwaves are inconclusive. Behavioral changes have been observed in laboratory animals exposed to microwave radiation. The non-microwave health and environmental considerations in the development of SPS are also considered. SPS effects on the atmosphere are discussed. Ionospheric disturbances on telecommunications are also considered. SPS microwave transmission represents a source of potential interference to many types of electronic and electrical instruments under a wide range of rectinnal siting situations. (RJC)

  9. Satellite Power Systems (SPS) Space Transportation Workshop Summary

    NASA Technical Reports Server (NTRS)

    Layton, J. P.

    1980-01-01

    Space transportation requirements are major elements in the technical and economic realization of the entire SPS concept. First, steps in enhancing the shuttle include the Titan based liquid boost module (LBM) and liquid propellant boosters (LPB) to replace the present solid rocket boosters (SRB). The next choice between new ballistic or winged boosters must still be made; as well as the choice between series (staged) and parallel operation. Entirely new vehicles of large size are required before the economic and environmental problems of the prototype, or even demonstration, SPS can be resolved. Social impacts such as noise, and atmospheric pollution, locally and in the ionosphere, must be fully addressed. Although rather advanced technology and well developed operational management is required to properly target the average cost of gross cargo payloads into LEO at 30 $ (1979)/kg for the construction of the initial SPS, the further goal for repetitive construction of 30 to 60 SPS at 15 $ (1979)/kg for all operational payloads require the use of very advanced, long lived vehicles with a sophisticated operational organization using off shore, equatorial launch sites.

  10. Satellite Power Systems (SPS) Space Transportation Workshop Summary

    NASA Astrophysics Data System (ADS)

    Layton, J. P.

    1980-07-01

    Space transportation requirements are major elements in the technical and economic realization of the entire SPS concept. First, steps in enhancing the shuttle include the Titan based liquid boost module (LBM) and liquid propellant boosters (LPB) to replace the present solid rocket boosters (SRB). The next choice between new ballistic or winged boosters must still be made; as well as the choice between series (staged) and parallel operation. Entirely new vehicles of large size are required before the economic and environmental problems of the prototype, or even demonstration, SPS can be resolved. Social impacts such as noise, and atmospheric pollution, locally and in the ionosphere, must be fully addressed. Although rather advanced technology and well developed operational management is required to properly target the average cost of gross cargo payloads into LEO at 30 $ (1979)/kg for the construction of the initial SPS, the further goal for repetitive construction of 30 to 60 SPS at 15 $ (1979)/kg for all operational payloads require the use of very advanced, long lived vehicles with a sophisticated operational organization using off shore, equatorial launch sites.

  11. Energy crisis and SPS for third world future

    NASA Astrophysics Data System (ADS)

    Mayur, Rashmi

    The benefits that the third world may reap in various areas from the development of satellite technology, including Solar Power Satellites (SPS), are examined. The areas considered include disaster warning, environmental monitoring, agriculture, education, communications, resource surveying, medicine, new materials, and energy development.

  12. A new concept of solar power satellite: Tethered-SPS

    NASA Astrophysics Data System (ADS)

    Sasaki, Susumu; Tanaka, Koji; Higuchi, Ken; Okuizumi, Nobukatsu; Kawasaki, Shigeo; Shinohara, Naoki; Senda, Kei; Ishimura, Kousei

    2007-02-01

    Tethered solar power satellite (Tethered-SPS) consisting of a large panel with a capability of power generation/transmission and a bus system which are connected by multi-wires is proposed as an innovative solar power satellite (SPS). The power generation/transmission panel is composed of a huge number of perfectly equivalent power modules. The electric power generated by the solar cells at the surface of each module is converted to the microwave power in the same module. Since the modules are controlled by the bus system using wireless LAN, no wired signal/power interfaces are required between the modules. The attitude in which the microwave transmission antenna is directed to the ground is maintained by the gravity gradient force. The tethered panel is composed of individual tethered subpanels which are loosely connected to each other. This configuration enables an evolutional construction in which the function of the SPS grows as the construction proceeds. A scale model of the tethered subpanel can be used for the first step demonstration experiment of the SPS in the near future.

  13. Analysis of the SPS Long Term Orbit Drifts

    SciTech Connect

    Velotti, Francesco; Bracco, Chiara; Cornelis, Karel; Drøsdal, Lene; Fraser, Matthew; Gianfelice-Wendt, Eliana; Goddard, Brennan; Kain, Verena; Meddahi, Malika

    2016-06-01

    The Super Proton Synchrotron (SPS) is the last accelerator in the Large Hadron Collider (LHC) injector chain, and has to deliver the two high-intensity 450 GeV proton beams to the LHC. The transport from SPS to LHC is done through the two Transfer Lines (TL), TI2 and TI8, for Beam 1 (B1) and Beam 2 (B2) respectively. During the first LHC operation period Run 1, a long term drift of the SPS orbit was observed, causing changes in the LHC injection due to the resulting changes in the TL trajectories. This translated into longer LHC turnaround because of the necessity to periodically correct the TL trajectories in order to preserve the beam quality at injection into the LHC. Different sources for the SPS orbit drifts have been investigated: each of them can account only partially for the total orbit drift observed. In this paper, the possible sources of such drift are described, together with the simulated and measured effect they cause. Possible solutions and countermeasures are also discussed.

  14. Results from NA60 experiment at the CERN SPS

    SciTech Connect

    Usai, G.; Cicalo, C.; De Falco, A.; Floris, M.; Masoni, A.; Puddu, G.; Serci, S.; Arnaldi, R.; Colla, A.; Cortese, P.; Ferretti, A.; Oppedisano, C.; Averbeck, R.; Drees, A.; Banicz, K.; Castor, J.; Devaux, A.; Force, P.; Manso, F.; Chaurand, B.

    2006-07-11

    The NA60 experiment studies open charm and prompt dimuon production in proton-nucleus and nucleus-nucleus collisions at the CERN SPS. During 2003 the experiment collected data in Indium-Indium collisions at 158 GeV per nucleon. In this paper the first results on low mass dimuons, intermediate mass dimuons and J/{psi} suppression are presented.

  15. Satellite Power Systems (SPS): Concept development and evaluation program: Preliminary assessment

    NASA Technical Reports Server (NTRS)

    1979-01-01

    A preliminary assessment of a potential Satellite Power System (SPS) is provided. The assessment includes discussion of technical and economic feasibility; the effects of microwave power transmission beams on biological, ecological, and electromagnetic systems; the impact of SPS construction, deployment, and operations on the biosphere and on society; and the merits of SPS compared to other future energy alternatives.

  16. Diamond beamline I07: a beamline for surface and interface diffraction

    PubMed Central

    Nicklin, Chris; Arnold, Tom; Rawle, Jonathan; Warne, Adam

    2016-01-01

    Beamline I07 at Diamond Light Source is dedicated to the study of the structure of surfaces and interfaces for a wide range of sample types, from soft matter to ultrahigh vacuum. The beamline operates in the energy range 8–30 keV and has two endstations. The first houses a 2+3 diffractometer, which acts as a versatile platform for grazing-incidence techniques including surface X-ray diffraction, grazing-incidence small- (and wide-) angle X-ray scattering, X-ray reflectivity and grazing-incidence X-ray diffraction. A method for deflecting the X-rays (a double-crystal deflector) has been designed and incorporated into this endstation, extending the surfaces that can be studied to include structures formed on liquid surfaces or at liquid–liquid interfaces. The second experimental hutch contains a similar diffractometer with a large environmental chamber mounted on it, dedicated to in situ ultrahigh-vacuum studies. It houses a range of complementary surface science equipment including a scanning tunnelling microscope, low-energy electron diffraction and X-ray photoelectron spectroscopy ensuring that correlations between the different techniques can be performed on the same sample, in the same chamber. This endstation allows accurate determination of well ordered structures, measurement of growth behaviour during molecular beam epitaxy and has also been used to measure coherent X-ray diffraction from nanoparticles during alloying. PMID:27577783

  17. Diamond beamline I07: a beamline for surface and interface diffraction.

    PubMed

    Nicklin, Chris; Arnold, Tom; Rawle, Jonathan; Warne, Adam

    2016-09-01

    Beamline I07 at Diamond Light Source is dedicated to the study of the structure of surfaces and interfaces for a wide range of sample types, from soft matter to ultrahigh vacuum. The beamline operates in the energy range 8-30 keV and has two endstations. The first houses a 2+3 diffractometer, which acts as a versatile platform for grazing-incidence techniques including surface X-ray diffraction, grazing-incidence small- (and wide-) angle X-ray scattering, X-ray reflectivity and grazing-incidence X-ray diffraction. A method for deflecting the X-rays (a double-crystal deflector) has been designed and incorporated into this endstation, extending the surfaces that can be studied to include structures formed on liquid surfaces or at liquid-liquid interfaces. The second experimental hutch contains a similar diffractometer with a large environmental chamber mounted on it, dedicated to in situ ultrahigh-vacuum studies. It houses a range of complementary surface science equipment including a scanning tunnelling microscope, low-energy electron diffraction and X-ray photoelectron spectroscopy ensuring that correlations between the different techniques can be performed on the same sample, in the same chamber. This endstation allows accurate determination of well ordered structures, measurement of growth behaviour during molecular beam epitaxy and has also been used to measure coherent X-ray diffraction from nanoparticles during alloying.

  18. Avian influenza virus with Hemagglutinin-Neuraminidase combination H8N8, isolated in Russia

    USDA-ARS?s Scientific Manuscript database

    This study reports the genome sequence of an avian influenza virus (AIV) subtype H8N8 isolated in Russia. The genome analysis shows that all genes belong to AIV Eurasian lineages. The PB2 gene was similar to a Mongolian low pathogenic (LP) AIV H7N1 and a Chinese high pathogenic (HP) AIV H5N2....

  19. 42 CFR 52h.8 - What are the review criteria for grants?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... SCIENTIFIC PEER REVIEW OF RESEARCH GRANT APPLICATIONS AND RESEARCH AND DEVELOPMENT CONTRACT PROJECTS § 52h.8... research, from a scientific or technical standpoint; (b) The adequacy of the approach and methodology... proposed research; and (h) The adequacy of the proposed protection for humans, animals, and the environment...

  20. Metrology and Tests beamline at SOLEIL Design and first results

    SciTech Connect

    Idir, Mourad; Mercere, Pascal; Moreno, Thierry; Delmotte, Aurelien; Dasilva, Paulo; Modi, Mohammed H.

    2010-06-23

    The objectives of this project is install at the 2.75 GeV SOLEIL synchrotron radiation source a calibration and metrology test facility for the R and D of optical components and detectors. We have build, on a bending magnet, two branches to cover an energy range from few eV to 28 keV and give access to white beam. This installation will first address the needs of the SOLEIL experimental groups(Optics and Detectors)and will be used by a large community. This beamline will also be valuable as a general-purpose beamline to prepare, test and set up a wide range of experiments in the field of Astrophysics, laser plasma etc...A complementary important aspect of this installation is the realization of primary standard: the metrology beamline of SOLEIL could become the national primary standard source in collaboration with the Laboratoire National d'Essais(LNE)and help in the design and characterization of several diagnostics for the Megajoule Laser in Bordeaux in collaboration with the CEA DIF. The beamline has been designed to provide great flexibility. In this paper, we describe the beamline design, the end station instrumentation and give also some preliminary results.

  1. Optics Concept for a Pair of Undulator Beamlines for MX.

    PubMed

    Berman, L E; Allaire, M; Chance, M R; Hendrickson, W A; Héroux, A; Jakoncic, J; Liu, Q; Orville, A M; Robinson, H H; Schneider, D K; Shi, W; Soares, A S; Stojanoff, V; Stoner-Ma, D; Sweet, R M

    2011-09-01

    We describe a concept for x-ray optics to feed a pair of macromolecular crystallography (MX) beamlines which view canted undulator radiation sources in the same storage ring straight section. It can be deployed at NSLS-II and at other low-emittance third-generation synchrotron radiation sources where canted undulators are permitted, and makes the most of these sources and beamline floor space, even when the horizontal angle between the two canted undulator emissions is as little as 1-2 mrad. The concept adopts the beam-separation principles employed at the 23-ID (GM/CA-CAT) beamlines at the Advanced Photon Source (APS), wherein tandem horizontally-deflecting mirrors separate one undulator beam from the other, following monochromatization by a double-crystal monochromator. The scheme described here would, in contrast, deliver the two tunable monochromatic undulator beams to separate endstations that address rather different and somewhat complementary purposes, with further beam conditioning imposed as required. A downstream microfocusing beamline would employ dual-stage focusing for work at the micron scale and, unique to this design, switch to single stage focusing for larger beams. On the other hand, the upstream, more highly automated beamline would only employ single stage focusing.

  2. A second beam-diagnostic beamline for the advanced lightsource

    SciTech Connect

    Sannibale, Fernando; Baum, Dennis; Kelez, Nicholas; Scarvie, Tom; Holldack, Karsten

    2003-05-01

    A second beamline, BL 7.2, completely dedicated to beam diagnostics is being installed at the Advanced Light Source (ALS). The design has been optimized for the measurement of the momentum spread and emittance of the stored beam in combination with the existing diagnostic beamline, BL 3.1. A detailed analysis of the experimental error has allowed the definition of the system parameters. The obtained requirements found a good matching with a simple and reliable system based on the detection of X-ray synchrotron radiation (SR) through a pinhole system. The actual beamline, which also includes a port for visible and infrared SR as well as an X-ray beam position monitor (BPM), is mainly based on the design of two similar diagnostic beamlines at BESSY II. This approach allowed a significant saving in time, cost and engineering effort. The design criteria, including a summary of the experimental error analysis, as well as a brief description of the beamline are presented.

  3. Optics Concept for a Pair of Undulator Beamlines for MX*

    PubMed Central

    Berman, L.E.; Allaire, M.; Chance, M.R.; Hendrickson, W.A.; Héroux, A.; Jakoncic, J.; Liu, Q.; Orville, A.M.; Robinson, H.H.; Schneider, D.K.; Shi, W.; Soares, A.S.; Stojanoff, V.; Stoner-Ma, D.; Sweet, R.M.

    2011-01-01

    We describe a concept for x-ray optics to feed a pair of macromolecular crystallography (MX) beamlines which view canted undulator radiation sources in the same storage ring straight section. It can be deployed at NSLS-II and at other low-emittance third-generation synchrotron radiation sources where canted undulators are permitted, and makes the most of these sources and beamline floor space, even when the horizontal angle between the two canted undulator emissions is as little as 1-2 mrad. The concept adopts the beam-separation principles employed at the 23-ID (GM/CA-CAT) beamlines at the Advanced Photon Source (APS), wherein tandem horizontally-deflecting mirrors separate one undulator beam from the other, following monochromatization by a double-crystal monochromator. The scheme described here would, in contrast, deliver the two tunable monochromatic undulator beams to separate endstations that address rather different and somewhat complementary purposes, with further beam conditioning imposed as required. A downstream microfocusing beamline would employ dual-stage focusing for work at the micron scale and, unique to this design, switch to single stage focusing for larger beams. On the other hand, the upstream, more highly automated beamline would only employ single stage focusing. PMID:21822346

  4. Development of highly reliable synchrotron radiation lithography beamline

    SciTech Connect

    Okada, K.; Fujii, K.; Kawase, Y.; Nagano, M.

    1988-01-01

    The reliable beamline structure for synchrotron radiation lithography has been investigated using the Photon Factory storage ring (2.5 GeV). The recently built beamline aims at attaining system reliability and safety. This beamline, one of three branch lines split from a basic beamline, is a 10/sup -7/ Pa ultrahigh-vacuum system with an oscillating mirror. In addition to a 40 ms fast closing valve (FCV) and an acoustic delay line (ADL), installed in the basic beamline, a <15 ms FCV and 40 ms ADL were set up to protect the storage ring from accidental breakdown. The FCV and ADL were placed far upstream of the oscillating mirror, to cope with accidental gas leakage caused by the oscillating mechanism. A vacuum breakdown test demonstrated that the FCV and ADL are greatly effective in vacuum protection. In order to protect operators from x-ray exposure, two auxiliary shutters made of tantalum were placed upstream of the oscillating mirror. The oscillating mirror, driven through bellows by a combination of a direct current servomotor and a cam mechanism, enabled a highly reliable oscillation. A double-structured bellows was adopted to provide against gas leakage. In addition, a silicon carbide plane mirror (40 x 17 x 4 cm) was employed because of its high-heat-resistance capability.

  5. Survey and documentation of emerging technologies for the Satellite Power System (SPS)

    NASA Technical Reports Server (NTRS)

    Glaser, P.; Chapman, P.

    1981-01-01

    The genesis of the solar power satellite (SPS) concept is reviewed historically and the original assumptions and guidelines which led to development of the SPS reference system design concept are discussed. Some guidelines are applicable to almost any SPS design, but others can be changed, leading to new and perhaps preferable systems. In order to stimulate new SPS concepts and to facilitate comparative assessment of emerging SPS technologies, one useful approach is to break the overall system into functional parts. The system functions which must be performed by any SPS concept and the interrelations between them are discussed and a systematic framework is presented for assessing the wide variety of system concepts and subsystem technologies which have been proposed. About 80 alternative SPS technologies are reviewed.

  6. Gas-phase electronic spectroscopy of the indene cation (C9H8+)

    NASA Astrophysics Data System (ADS)

    Chalyavi, Nahid; Dryza, Viktoras; Sanelli, Julian A.; Bieske, Evan J.

    2013-06-01

    The electronic spectrum of the indene radical cation has been investigated through resonance-enhanced photodissociation of the weakly bound C9H8+-He and C9H8+-Arn (n = 1, 2) complexes in a tandem mass spectrometer. The D2 ← D0 band origin for indene+-He is observed at 17 379 ± 15 cm-1, while the D2 ← D0 and D4 ← D0 band origins for indene+-Ar appear at 17 353 ± 15 cm-1 and 28 254 ± 15 cm-1, respectively. The vibronic structure of the D2 ← D0 band system is assigned by comparison with a simulated spectrum based on time-dependent density functional theory calculations, and is due mainly to progressions in ring deformation vibrational modes. Possible correspondences between the stronger visible transitions of the indene cation and diffuse interstellar bands observed towards the heavily reddened star HD 204827 are discussed.

  7. 08B1-1: an automated beamline for macromolecular crystallography experiments at the Canadian Light Source.

    PubMed

    Fodje, Michel; Grochulski, Pawel; Janzen, Kathryn; Labiuk, Shaunivan; Gorin, James; Berg, Russ

    2014-05-01

    Beamline 08B1-1 is a recently commissioned bending-magnet beamline at the Canadian Light Source. The beamline is designed for automation and remote access. Together with the undulator-based beamline 08ID-1, they constitute the Canadian Macromolecular Crystallography Facility. This paper describes the design, specifications, hardware and software of beamline 08B1-1. A few scientific results using data obtained at the beamline will be highlighted.

  8. Construction and performance of combustion beamline at NSRL

    SciTech Connect

    Du, Xuewei; Wei, Shen; Du, Liangliang; Yang, Jiuzhong; Zhou, Zhongyue; Qi, Fei; Wang, Qiuping; Li, Chaoyang

    2016-07-27

    An undulator-based VUV beamline BL03U is constructed at the National Synchrotron Radiation Laboratory. Optical design and performance test results are presented in this paper. The monochromator is a Czerny–Turner configuration with a toroidal collimating mirror, two plane gratings, and a toroidal focusing mirror. Plane gratings with line densities of 200 and 400 l/mm are used to cover the photon energy range of 5–21 eV. A gas absorption spectrum is used to evaluate the beamline performance. The photon energy resolving power (E/ΔE) of the beamline is approximately 3900 at 7.3 eV for the 200 l/mm grating and 4200 at 14.6 eV for the 400 l/mm grating. The photon flux is approximately 5×10{sup 12} photons/s/300 mA at energy of 10 eV.

  9. Physical optics simulations with PHASE for SwissFEL beamlines

    SciTech Connect

    Flechsig, U.; Follath, R.; Reiche, S.; Bahrdt, J.

    2016-07-27

    PHASE is a software tool for physical optics simulation based on the stationary phase approximation method. The code is under continuous development since about 20 years and has been used for instance for fundamental studies and ray tracing of various beamlines at the Swiss Light Source. Along with the planning for SwissFEL a new hard X-ray free electron laser under construction, new features have been added to permit practical performance predictions including diffraction effects which emerge with the fully coherent source. We present the application of the package on the example of the ARAMIS 1 beamline at SwissFEL. The X-ray pulse calculated with GENESIS and given as an electrical field distribution has been propagated through the beamline to the sample position. We demonstrate the new features of PHASE like the treatment of measured figure errors, apertures and coatings of the mirrors and the application of Fourier optics propagators for free space propagation.

  10. The ORNL beamline at the National Synchrotron Light Source

    SciTech Connect

    Habenschuss, A.; Ice, G.E.; Sparks, C.J.; Neiser, R.A.

    1987-06-16

    The Oak Ridge National Laboratory's (ORNL) beamline at the National Synchrotron Light Source (NSLS) incorporates several novel features including x-ray optics based on sagittal focusing with crystals and a cantilevered mirror whose center becomes the pivot for all downstream optical elements. Crystal focusing accepts a much larger horizontal divergence of radiation than a mirror while maintaining excellent momentum transfer and energy resolution. This sagittally bent crystal serves as the second element of a two-crystal, nondispersive monochromator. The cantilevered mirror provides a simple design for vertical focusing of the radiation. The beamline is suitable for both x-ray scattering and spectroscopy experiments requiring good energy resolution and high intensity in the energy range from 2.5 to 40 keV. This paper describes the optics of the ORNL beamline and reports their performance to date.

  11. Optical layouts for large infrared beamline opening angles

    NASA Astrophysics Data System (ADS)

    Moreno, Th; Westfahl, H.; de Oliveira Freitas, R.; Petroff, Y.; Dumas, P.

    2013-03-01

    The number of infrared beamlines at synchrotron facilities is expending worldwide. Due to the long wavelength of the radiation in the infrared region, the optimum collection of the emitted photons requires large opening angles, both vertically and horizontally (order of few tens of mrad). Most of the infrared beamlines use toroid shaped mirrors, or elliptical mirror to conjointly focus both the vertical and the horizontal source emission. However, such optical set ups produce distorted images due to the optical aberrations produced by the depth and the circular shape of the source. In this article, we propose a new optical layout consisting in two optimized shape mirrors, focusing independently the vertical and the horizontal source emission, and providing low aberration beams for large horizontal apertures. The setup has been used to design the new LNLS Brazilian synchrotron Infrared beamline.

  12. The Far-IR Beamline at the Canadian Light Source

    NASA Astrophysics Data System (ADS)

    Appadoo, Dominique R. T.

    2007-06-01

    The far-infrared (far-IR) beamline at the Canadian Light Source Inc. (CLSI) has been dedicated primarily to high-resolution spectroscopic studies of stable and unstable gas-phase molecules. The infrared radiation collected from a Bending Magnet is steered using long wavelength optics to a Br"uker IFS125HR spectrometer which is able to record spectra at a resolution of 0.001 cm-1. The far-IR beamline is presently being commissioned, and recent efforts in the optical alignment and noise reduction have rendered the beamline partially operational. The signal-to-noise ratio of data recorded with the synchrotron is better than that recorded with a thermal source by a factor of 8 around the 400 - 600 cm-1 region. As a result, we are presently accepting proposals for the next cycle (July - Dec 2007) for experiments which can be conducted in this spectral region.

  13. The Fundamental Neutron Physics Beamline at the Spallation Neutron Source

    PubMed Central

    Greene, Geoffrey; Cianciolo, Vince; Koehler, Paul; Allen, Richard; Snow, William Michael; Huffman, Paul; Gould, Chris; Bowman, David; Cooper, Martin; Doyle, John

    2005-01-01

    The Spallation Neutron Source (SNS), currently under construction at Oak Ridge National Laboratory with an anticipated start-up in early 2006, will provide the most intense pulsed beams of cold neutrons in the world. At a projected power of 1.4 MW, the time averaged fluxes and fluences of the SNS will approach those of high flux reactors. One of the flight paths on the cold, coupled moderator will be devoted to fundamental neutron physics. The fundamental neutron physics beamline is anticipated to include two beam-lines; a broad band cold beam, and a monochromatic beam of 0.89 nm neutrons for ultracold neutron (UCN) experiments. The fundamental neutron physics beamline will be operated as a user facility with experiment selection based on a peer reviewed proposal process. An initial program of five experiments in neutron decay, hadronic weak interaction and time reversal symmetry violation have been proposed. PMID:27308112

  14. Antibodies to Meningococcal H.8 (Lip) Antigen Fail to Show Bactericidal Activity

    DTIC Science & Technology

    1990-01-01

    monoclonaux n’avaient pas non plus d’activit6 bactericide contre ces souches. La faible activitt bactdricide associee aux anticorps monoclonaux et...MENINGOCOCCAL H.8 (Lip) ANTIGEN FAILTO SHOW BACTERICIDAL ACTIVITY. 12. PERSONAL. DUTHOR(S AK BHATTACHARJEE, EE MORAN, & WD ZOLLINGER. lb. TMP OP REPORT DATE...isotypes. An anti-Lip mouse monoclonal ascites (2-1-CA2) had 28 400 ELISA units of antibody. Bactericidal assays were performed using three different

  15. Nqrs Data for C10H8ClN3O (Subst. No. 1220)

    NASA Astrophysics Data System (ADS)

    Chihara, H.; Nakamura, N.

    This document is part of Subvolume A `Substances Containing Ag … C10H15' of Volume 48 `Nuclear Quadrupole Resonance Spectroscopy Data' of Landolt-Börnstein - Group III `Condensed Matter'. It contains an extract of Section `3.2 Data tables' of the Chapter `3 Nuclear quadrupole resonance data' providing the NQRS data for C10H8ClN3O (Subst. No. 1220)

  16. Nqrs Data for C10H8ClN3O (Subst. No. 1217)

    NASA Astrophysics Data System (ADS)

    Chihara, H.; Nakamura, N.

    This document is part of Subvolume A `Substances Containing Ag … C10H15' of Volume 48 `Nuclear Quadrupole Resonance Spectroscopy Data' of Landolt-Börnstein - Group III `Condensed Matter'. It contains an extract of Section `3.2 Data tables' of the Chapter `3 Nuclear quadrupole resonance data' providing the NQRS data for C10H8ClN3O (Subst. No. 1217)

  17. Nqrs Data for C10H8ClN3O (Subst. No. 1216)

    NASA Astrophysics Data System (ADS)

    Chihara, H.; Nakamura, N.

    This document is part of Subvolume A `Substances Containing Ag … C10H15' of Volume 48 `Nuclear Quadrupole Resonance Spectroscopy Data' of Landolt-Börnstein - Group III `Condensed Matter'. It contains an extract of Section `3.2 Data tables' of the Chapter `3 Nuclear quadrupole resonance data' providing the NQRS data for C10H8ClN3O (Subst. No. 1216)

  18. Nqrs Data for C10H8ClN3O (Subst. No. 1221)

    NASA Astrophysics Data System (ADS)

    Chihara, H.; Nakamura, N.

    This document is part of Subvolume A `Substances Containing Ag … C10H15' of Volume 48 `Nuclear Quadrupole Resonance Spectroscopy Data' of Landolt-Börnstein - Group III `Condensed Matter'. It contains an extract of Section `3.2 Data tables' of the Chapter `3 Nuclear quadrupole resonance data' providing the NQRS data for C10H8ClN3O (Subst. No. 1221)

  19. Nqrs Data for C10H8D2 (Subst. No. 1222)

    NASA Astrophysics Data System (ADS)

    Chihara, H.; Nakamura, N.

    This document is part of Subvolume A `Substances Containing Ag … C10H15' of Volume 48 `Nuclear Quadrupole Resonance Spectroscopy Data' of Landolt-Börnstein - Group III `Condensed Matter'. It contains an extract of Section `3.2 Data tables' of the Chapter `3 Nuclear quadrupole resonance data' providing the NQRS data for C10H8D2 (Subst. No. 1222)

  20. NQRS Data for C10H8ClNO (Subst. No. 1215)

    NASA Astrophysics Data System (ADS)

    Chihara, H.; Nakamura, N.

    This document is part of Subvolume A `Substances Containing Ag … C10H15' of Volume 48 `Nuclear Quadrupole Resonance Spectroscopy Data' of Landolt-Börnstein - Group III `Condensed Matter'. It contains an extract of Section `3.2 Data tables' of the Chapter `3 Nuclear quadrupole resonance data' providing the NQRS data for C10H8ClNO (Subst. No. 1215)

  1. Nqrs Data for C10H8ClN3O (Subst. No. 1219)

    NASA Astrophysics Data System (ADS)

    Chihara, H.; Nakamura, N.

    This document is part of Subvolume A `Substances Containing Ag … C10H15' of Volume 48 `Nuclear Quadrupole Resonance Spectroscopy Data' of Landolt-Börnstein - Group III `Condensed Matter'. It contains an extract of Section `3.2 Data tables' of the Chapter `3 Nuclear quadrupole resonance data' providing the NQRS data for C10H8ClN3O (Subst. No. 1219)

  2. Nqrs Data for C10H8ClN3O (Subst. No. 1218)

    NASA Astrophysics Data System (ADS)

    Chihara, H.; Nakamura, N.

    This document is part of Subvolume A `Substances Containing Ag … C10H15' of Volume 48 `Nuclear Quadrupole Resonance Spectroscopy Data' of Landolt-Börnstein - Group III `Condensed Matter'. It contains an extract of Section `3.2 Data tables' of the Chapter `3 Nuclear quadrupole resonance data' providing the NQRS data for C10H8ClN3O (Subst. No. 1218)

  3. Catalytic Asymmetric Methallylation of Ketones with an (H8-BINOLate)Ti-Based Catalyst

    PubMed Central

    Kim, Jeung Gon; Camp, Elizabeth H.; Walsh, Patrick J.

    2008-01-01

    The first catalytic asymmetric methallylation of ketones is reported. The catalyst, which is generated from titanium tetraisopropoxide, H8-BINOL, isopropanol, and tetramethallylstannane, reacts with ketones in acetonitrile to afford tertiary homoallylic alcohols in fair to excellent yields (55-99%) and fair to high enantioselectivities (46-90%). Ozonolysis of the resulting products provides access to chiral β-hydroxy ketones, which are not readily prepared from direct asymmetric aldol reaction of acetone with ketones. PMID:16986913

  4. Satellite Power Systems (SPS) concept definition study, exhibit C. Volume 2, part 2: System engineering, cost and programmatics, appendixes

    NASA Technical Reports Server (NTRS)

    Hanley, G. M.

    1979-01-01

    Appendixes for Volume 2 (Part 2) of a seven volume Satellite (SPS) report are presented. The document contains two appendixes. The first is a SPS work breakdown structure dictionary. The second gives SPS cost estimating relationships and contains the cost analyses and a description of cost elements that comprise the SPS program.

  5. Satellite power system (SPS) magnetron tube assessment study

    NASA Technical Reports Server (NTRS)

    1980-01-01

    Taks performed to extend the data base and to define a technology development program for the magnetron directional amplifier for the SPS are reviewed. These include: (1) demonstrating the tracking of phase and amplitude of the microwave output to phase and amplitude references; (2) expanding the range of power over which the directional amplifier will operate; (3)recognizing the importance of amplitude control in overall system design and in simplifying power conditioning; (4) developing a preliminary design for the overall architecture of the power module; (5) demonstrating magnetron starting using the amplitude control system; (6) mathematically modelling and performing a computerized study of the pyrolytic graphite radiating fin; (7) defining the mass of the magnetic circuit for the SPS tube; (8) noise measurement; (9) achieving harmonic suppression by notch reflection filters; (10) estimating the mass of the transmitting antenna; (11) developing a magnetron package with power generation, phase control, and power condition functions; and (12) projecting magnetron package characteristics.

  6. Solar Power Satellite (SPS) fiber optic link assessment

    NASA Technical Reports Server (NTRS)

    1980-01-01

    A feasibility demonstration of a 980 MHz fiber optic link for the Solar Power Satellite (SPS) phase reference distribution system was accomplished. A dual fiber-optic link suitable for a phase distribution frequency of 980 MHz was built and tested. The major link components include single mode injection laser diodes, avalanche photodiodes, and multimode high bandwidth fibers. Signal throughput was demonstrated to be stable and of high quality in all cases. For a typical SPS link length of 200 meters, the transmitted phase at 980 MHz varies approximately 2.5 degrees for every deg C of fiber temperature change. This rate is acceptable because of the link length compensation feature of the phase control design.

  7. SPS-IdR case studies in Reunion Island

    SciTech Connect

    Pignolet, G.

    1996-12-31

    After the demand was made at SPS-91 for the implementation of operational WPT systems, Reunion Island, a piece of Europe located in the Indian Ocean, appeared to be one of the good possible sites for such demonstrations. Two point-to-point cases to bring power to isolated mountain villages and one HALE case have been selected for study. In December 1994, a major international workshop has allowed meetings between WPT technical experts and representatives from the potential user community, including government officials, and the ISAS functional model of SPS-2000 was shown to the public. As a result of the workshop, it was confirmed that good integration of WPT systems into the natural and social environment will be an issue of prime importance for the future of the projects. 6 refs., 1 fig.

  8. Kinematic mounting systems for NSLS beamlines and experiments

    SciTech Connect

    Oversluizen, T.; Stoeber, W.; Johnson, E.D.

    1991-01-01

    Methods for kinematically mounting equipment are well established, but applications at synchrotron radiation facilities are subject to constraints not always encountered in more traditional laboratory settings. Independent position adjustment of beamline components can have significant benefits in terms of minimizing time spent aligning, and maximizing time spent acquiring data. In this paper, we use examples taken from beamlines at the NSLS to demonstrate approaches for optimization of the reproducibility, stability, excursion, and set-up time for various situations. From our experience, we extract general principles which we hope will be useful for workers at other synchrotron radiation facilities. 7 refs., 4 figs.

  9. A beamline matching application based on open source software

    SciTech Connect

    2000-12-21

    An interactive Beamline Matching application has been developed using beamline and automatic differentiation class libraries. Various freely available components were used; in particular, the user interface is based on FLTK, a C++ toolkit distributed under the terms of the GNU Public License (GPL). The result is an application that compiles without modifications under both X-Windows and Win32 and offers the same look and feel under both operating environments. In this paper, we discuss some of the practical issues that were confronted and the choices that were made. In particular, we discuss object-based event propagation mechanisms, multithreading, language mixing and persistence.

  10. The Materials Science beamline upgrade at the Swiss Light Source

    PubMed Central

    Willmott, P. R.; Meister, D.; Leake, S. J.; Lange, M.; Bergamaschi, A.; Böge, M.; Calvi, M.; Cancellieri, C.; Casati, N.; Cervellino, A.; Chen, Q.; David, C.; Flechsig, U.; Gozzo, F.; Henrich, B.; Jäggi-Spielmann, S.; Jakob, B.; Kalichava, I.; Karvinen, P.; Krempasky, J.; Lüdeke, A.; Lüscher, R.; Maag, S.; Quitmann, C.; Reinle-Schmitt, M. L.; Schmidt, T.; Schmitt, B.; Streun, A.; Vartiainen, I.; Vitins, M.; Wang, X.; Wullschleger, R.

    2013-01-01

    The Materials Science beamline at the Swiss Light Source has been operational since 2001. In late 2010, the original wiggler source was replaced with a novel insertion device, which allows unprecedented access to high photon energies from an undulator installed in a medium-energy storage ring. In order to best exploit the increased brilliance of this new source, the entire front-end and optics had to be redesigned. In this work, the upgrade of the beamline is described in detail. The tone is didactic, from which it is hoped the reader can adapt the concepts and ideas to his or her needs. PMID:23955029

  11. Upgrades to the Fermilab NuMI beamline

    SciTech Connect

    Martens, Michael A.; Childress, Sam; Grossman, Nancy; Hurh, Patrick; Hylen, James; Marchionni, Alberto; McCluskey, Elaine; Moore, Craig Damon; Reilly, Robert; Tariq, Salman; Wehmann, Alan; /Fermilab

    2007-06-01

    The NuMI beamline at Fermilab has been delivering high-intensity muon neutrino beams to the MINOS experiment since the spring of 2005. A total of 3.4 x 10{sup 20} protons has been delivered to the NuMI target and a maximum beam power of 320 kW has been achieved. An upgrade of the NuMI facility increasing the beam power capability to 700 kW is planned as part of the NOvA experiment. The plans for this upgrade are presented and the possibility of upgrading the NuMI beamline to handle 1.2 MW is considered.

  12. Photochemical Modeling of the Distribution of C3H8 in the Atmosphere of Saturn

    NASA Astrophysics Data System (ADS)

    Edgington, S. G.; Simon-Miller, A.; Jennings, D.; Bjoraker, G.; Romani, P.; Achterberg, R.; Orton, G.; Flasar, M.; Cassini CIRS Team

    2005-08-01

    Cassini's Composite Infrared Spectrometer (CIRS) has measured the abundance of C2H2 and C3H8 (Propane) at several latitudes in the Southern hemisphere. An increase of radiance with latitude towards the pole has been observed, possibly implying a corresponding increase of C3H8. In an effort explain the observed distribution of both species, it is important to model the creation, destruction, and transport of these chemical species. Furthermore, since both molecules have overlapping absorption features in the same spectral region near 748 cm-1, such modeling will aid in refining derived abundances and separating temperature effects. The photochemistry model used in Edgington et al. (1998, 1999, 2000) to model simultaneously hydrocarbons, ammonia, and phosphine is updated and expanded to include paths relevant to the creation of C3H8. Destruction occurs through photolysis, while transport would tend to spread C3H8 from its source regions. With a series of exercises in 1- and 2- dimensions, we explore the extent to which photolysis, vertical, and/or meridional transport impacts the distribution of C2H2 and C3H8 with latitude. Thermal profiles derived from CIRS observations versus latitude are used as they have an impact on numerous reaction rates. We then compare these results with abundances derived from observations taken with the CIRS instrument. Edgington, S.G., West, R.A., Friedson, A.J., Atreya, S.K., 2000. A 2-D photochemical model with meridional circulation. Bull. American. Astron. Soc., 32, 1013. Edgington, S.G., S.K. Atreya, L.M. Trafton, J.J. Caldwell, R.F. Beebe, A.A. Simon, and R.A. West, 1999. Ammonia and eddy mixing variations in the southern hemisphere of Jupiter from HST Faint Object Spectrograph Observations. Icarus, 142, 342-357. Edgington, S.G., S.K. Atreya, L.M. Trafton, J.J. Caldwell, R.F. Beebe, A.A. Simon, R.A. West, and C. Barnet, 1998. On the latitude variation of ammonia, acetylene, and phosphine altitude profiles on Jupiter from HST Faint

  13. Modified reference SPS with solid state transmitting antenna

    NASA Technical Reports Server (NTRS)

    Woodcock, G. R.; Sperber, B. R.

    1980-01-01

    The motivations for considering solid state microwave power amplifiers for the solar power satellite transmitting antenna are the possibilities of greatly increased system reliability due to elimination of electron tube cathodes, a lower mass per unit power and transmitting array area due to the high power densities obtainable in semiconductors, and, probably, cost savings due to development of small hardware items that can be handled by individuals instead of organizations. In order to provide a fair assessment where we stand today with regard to solid state SPS technology, the design described here is close to that of the NASA/DOE reference and is implemented using today's solid state technology with only a small "push". The small push is raising the efficiency of DC-RF conversion from the .68 obtained by RCA in 1975 to somewhat over .8 of the solid state SPS. This is generally considered feasible by semiconductor industry representatives. Other solid state SPS configurations can yield somewhat better performance. However, these generally do not provide as fair a vehicle for comparison with the reference and usually also incorporate somewhat more advanced technologies.

  14. Laser prospects for SPS and restoration of the ozone layer

    NASA Technical Reports Server (NTRS)

    Kruzhilin, Yuri

    1992-01-01

    Large-scale applications of high-power lasers are considered (special experiments are described to confirm the feasibility of these applications) to achieve also large-scale environmental advantages. The possibility of producing electric energy by Laser-Solar Power Satellites in the near future is discussed. A full-scale experimental L-SPS satellite is suggested as a module of a global space energy network. Electric power of about 10 MW at the surface of the Earth is achievable as a result of energy conversion of laser radiation. L-SPS is based on the greatest advantages of present optics and laser techniques. Specialized-scale experiments are carried out and described. L-SPS project could provide real electricity for consumers not later than by highly developed fusion techniques, and the environmental aftereffects are quite favorable. A new method of power supply for satellites is suggested, based on the connection of an on-board electric circuit directly with the ground-based power grid by means of laser beams.

  15. Assessors for communication skills: SPs or healthcare professionals?

    PubMed

    Liew, Siaw-Cheok; Dutta, Susmita; Sidhu, Jagmohni Kaur; De-Alwis, Ranjit; Chen, Nicole; Sow, Chew-Fei; Barua, Ankur

    2014-07-01

    The complexity of modern medicine creates more challenges for teaching and assessment of communication skills in undergraduate medical programme. This research was conducted to study the level of communication skills among undergraduate medical students and to determine the difference between simulated patients and clinical instructors' assessment of communication skills. This comparative study was conducted for three months at the Clinical Skills and Simulation Centre of the International Medical University in Malaysia. The modified Calgary-Cambridge checklist was used to assess the communication skills of 50 first year and 50 second year medical students (five-minutes pre-recorded interview videos on the scenario of sore throat). These videos were reviewed and scored by simulated patients (SPs), communication skills instructors (CSIs) and non-communication skills instructors (non-CSIs). Better performance was observed among the undergraduate medical students, who had formal training in communication skills with a significant difference in overall scores detected among the first and second year medical students (p = 0.0008). A non-significant difference existed between the scores of SPs and CSIs for Year 1 (p = 0.151). The SPs could be trained and involved in assessment of communication skills. Formal training in communication skills is necessary in the undergraduate medical programme.

  16. SPS energy conversion and power management workshop. Final report

    SciTech Connect

    Not Available

    1980-06-01

    In 1977 a four year study, the concept Development and Evaluation Program, was initiated by the US Department of Energy and the National Aeronautics and Space Administration. As part of this program, a series of peer reviews were carried out within the technical community to allow available information on SPS to be sifted, examined and, if need be, challenged. The SPS Energy Conversion and Power Management Workshop, held in Huntsville, Alabama, February 5 to 7, 1980, was one of these reviews. The results of studies in this particular field were presented to an audience of carefully selected scientists and engineers. This first report summarizes the results of that peer review. It is not intended to be an exhaustive treatment of the subject. Rather, it is designed to look at the SPS energy conversion and power management options in breadth, not depth, to try to foresee any troublesome and/or potentially unresolvable problems and to identify the most promising areas for future research and development. Topics include photovoltaic conversion, solar thermal conversion, and electric power distribution processing and power management. (WHK)

  17. Characterization of resonant impedances of CERN-SPS gate valves

    NASA Astrophysics Data System (ADS)

    Kaltenbacher, Thomas; Repond, Joel; Vollinger, Christine

    2017-07-01

    For the CERN High Luminosity LHC project, a doubling of bunch intensity is foreseen. However, this intensity increase is currently limited by the LHC injector chain, in part due to longitudinal multi-bunch instabilities in the SPS. Therefore, the implementation of an accurate SPS impedance model was started some time ago in order to obtain a better understanding of instability sources and develop mitigation measures. In this paper, we present the electromagnetic characterization of commonly used all-metal gate valves with respect to their contribution to the SPS longitudinal impedance. The valve impedance was evaluated with commercially available EM-field simulation programs and verified with RF-bench measurements. Using this input, it was possible to obtain in particle simulations the dependence of the multibunch stability threshold on the number of these valves. The threshold can be increased by using commercially available impedance shielded valves. Consequently, we present the associated reduction in beam coupling impedance and the expected gain in beam stability if all existing unshielded valves are replaced by shielded ones.

  18. Alternative future scenarios for the SPS comparative assessment

    SciTech Connect

    Ayres, R.U.; Ridker, R.G.; Watson, W.D. Jr.; Arnold, J.; Tayi, G.

    1980-08-01

    The objective of the comparative assessment is to develop an initial understanding of the SPS with respect to a limited set of energy alternatives. A comparative methodology report describes the multi-step process in the comparative assessment. The first step is the selection and characterization of alternative energy systems. Terrestrial alternatives are selected, and their cost, performance, and environmental and social attributes are specified for use in the comparison with the SPS in the post-2000 era. Data on alternative technologies were sought from previous research and from other comparisons. The object of this study is to provide a futures framework for evaluating SPS (i.e., factor prices, primary energy prices, and energy demands for the US from 1980 to 2030). The economic/energy interactions are discussed, and a number of specific modelling schemes that have been used for long-range forecasting purposes are described. This discussion provides the rationale for the choice of a specific model and methodology, which is described. Long-range cost assumptions used in the forecast are detailed, and the basis for the selection of specific scenarios follows. Results of the analysis are detailed. (WHK)

  19. Distributed control of protein crystallography beamline 5.0 using CORBA

    SciTech Connect

    Timossi, Chris

    1999-09-24

    The Protein Crystallography Beamline at Berkeley Lab's Advanced Light Source is a facility that is being used to solve the structure of proteins. The software that is being used to control this beamline uses Java for user interface applications which communicate via CORBA with workstations that control the beamline hardware. We describe the software architecture for the beamline and our experiences after two years of operation.

  20. The first infrared beamline at the ALS: Design, construction, and initial commissioning

    SciTech Connect

    McKinney, W.R.; Hirschmugl, C.J.; Padmore, H.A.; Lauritzen, T.; Andresen, N.; Andronaco, G.; Patton, R.; Fong, M.

    1997-09-01

    The first Infrared (IR) Beamline at the Advanced Light Source (ALS), Beamline 1.4, is described. The design of the optical and mechanical systems are discussed, including choices and tradeoffs. The initial commissioning of the beamline is reported. The beamline, while designed primarily for IR microscopy and only initially instrumented for microscopy (with a Nicolet interferometer and microscope), will have the potential for surface science experiments at grazing incidence, and time-resolved visible spectroscopy.

  1. Front end for high-repetition rate thin disk-pumped OPCPA beamline at ELI-beamlines

    NASA Astrophysics Data System (ADS)

    Green, Jonathan T.; Novák, Jakub; Antipenkov, Roman; Batysta, František; Zervos, Charalampos; Naylon, Jack A.; Mazanec, TomáÅ.¡; Horáček, Martin; Bakule, Pavel; Rus, Bedřich

    2015-02-01

    The ELI-Beamlines facility, currently under construction in Prague, Czech Republic, will house multiple high power laser systems with varying pulse energies, pulse durations, and repetition rates. Here we present the status of a high repetition rate beamline currently under construction with target parameters of 20 fs pulse duration, 100 mJ pulse energy, and 1 kHz repetition rate. Specifically we present the Yb:YAG thin disk lasers which are intended to pump picosecond OPCPA, synchronization between pump and signal pulses in the OPCPA, and the first stages of OPCPA.

  2. Petit-exposure at neutrino beamline (PEANUT)

    SciTech Connect

    Niwa, K.; /Nagoya U.

    2005-08-01

    The advantages of using nuclear emulsion as a particle detector are well known. The high resolution of emulsion has made it a medium of choice for a number of applications where the required spatial and angular resolution are paramount and its limitations due to the lack of timing information are less important. Emulsions are commonly used as cosmic ray detectors and have found applications in high energy experiments for detecting short lived particles such as charm, beauty and tau. The addition of electronic detectors to emulsion experiments solved the problem of the lack of timing information in the emulsion, but it was the development of automatic scanning machines that revolutionized the use of these hybrid detectors, making them capable of performing even in high rate environments. Most recently, The DONuT experiment (FNAL-E872), used a hybrid emulsion spectrometer to make the first direct observation of tau neutrino interactions [1]. The CNGS facility is being constructed to deliver a {nu}{sub {mu}} beam from the CERN SPS to the Gran Sasso Laboratory. Since it is believed that {nu}{sub {mu}} {leftrightarrow} {nu}{sub {tau}} oscillations explain the observed atmospheric {nu}{sub {mu}} deficit, the CNGS beam, coupled with a detector capable of observing {tau} appearance is an important experiment in the context of the world wide effort to determine the neutrino mass mixing matrix. The OPERA detector has been optimized to detect a significant sample of {nu}{sub {tau}} interactions by the subsequent observation of {tau} production and decay [2]. The OPERA target is a massive emulsion detector made in a sandwich structure of lead plates and layers of nuclear emulsion. For historical reasons this arrangement has been called an Emulsion Cloud Chamber or ECC. The ECC concept, which has many advantages over the use of bulk emulsion, has been used in the DONuT experiment. The ECC detector is capable of measuring all of the tracks, not due to nuclear fragments, coming

  3. Beamline Control and Instrumentation System using Industrial Interface Techniques

    SciTech Connect

    Enz, F.

    2010-06-23

    How should a beamline be designed, which satisfies the needs and requirements of scientists and is easy to build and operate? Today, most control and instrumentation systems for beamlines are based on scientific requirements. Scientific details of the beamline, e.g. vacuum and beam physics details; are usually extensively described. However, control system specifications are often reduced to few requirements, e.g. which beam-related device to use. Lots of these systems work perfectly from the physicist's point of view, but are hard to bring into service and operate and difficult to extend with additional equipment. To overcome this, the engineering company ENZ has developed components using industrial standard interfaces to guarantee high flexibility for equipment extension. Using special interface boards and galvanic isolation offers increased stability of motion control axes. This saves resources during commissioning and service. A control system was developed and installed at a Soft-X-ray beamline at ASP Melbourne. It is operated under EPICs on distributed embedded IOC's based on PC-hardware. Motion and vacuum systems, measurement devices, e.g. a Low-Current Monitor (LoCuM) for beam position monitoring, and parts of the equipment protection system were developed and most of them tested in cooperation with DELTA at the Technical University of Dortmund.

  4. A modular optics design for the LBNE beamline

    SciTech Connect

    Johnstone, John A.; /Fermilab

    2010-10-01

    Protons extracted from the Main Injector (MI) in the MI-60 straight section are transported 84 m through quadrupole Q106 in the NuMI stub, at which point two 6-3-120 vertical switching magnets, followed by three EPB vertical dipoles, steer the beam into the main body of the LBNE beamline. From Q106 in NuMI the LBNE beamline transports these protons 722.0 m to the LBNE target, located 41.77 m (137.0 ft) below the MI beamline center (BLC) elevation, on a trajectory aimed towards DUSEL. Bending is provided (predominantly) by 34 long (6 m) MI-style IDA/IDB and 8 short (4 m) IDC/IDD dipoles [through 48.36{sup o} horizontally and -5.844{sup o} (net) vertically]. Optical properties are defined by 49 quadrupoles (grouped functionally into 44 focusing centers) of the proven MI beamline-style 3Q60/3Q120 series. All focusing centers are equipped with redesigned MI-style IDS orbit correctors and dual-plane beam position monitors (BPM's). Ample space is available in each arc cell to accommodate ion pumps and diagnostic instrumentation. Parameters of the main magnets are listed in a table.

  5. The High Energy Materials Science Beamline (HEMS) at PETRA III

    NASA Astrophysics Data System (ADS)

    Schell, Norbert; King, Andrew; Beckmann, Felix; Ruhnau, Hans-Ulrich; Kirchhof, René; Kiehn, Rüdiger; Müller, Martin; Schreyer, Andreas

    2010-06-01

    The HEMS Beamline at the German high-brilliance synchrotron radiation storage ring PETRA III is fully tunable between 30 and 250 keV and optimized for sub-micrometer focusing. Approximately 70 % of the beamtime will be dedicated to Materials Research. Fundamental research will encompass metallurgy, physics and chemistry with first experiments planned for the investigation of the relationship between macroscopic and micro-structural properties of polycrystalline materials, grain-grain-interactions, and the development of smart materials or processes. For this purpose a 3D-microsctructure-mapper has been designed. Applied research for manufacturing process optimization will benefit from high flux in combination with ultra-fast detector systems allowing complex and highly dynamic in-situ studies of micro-structural transformations, e.g. during welding processes. The beamline infrastructure allows accommodation of large and heavy user provided equipment. Experiments targeting the industrial user community will be based on well established techniques with standardized evaluation, allowing full service measurements, e.g. for tomography and texture determination. The beamline consists of a five meter in-vacuum undulator, a general optics hutch, an in-house test facility and three independent experimental hutches working alternately, plus additional set-up and storage space for long-term experiments. HEMS is under commissioning as one of the first beamlines running at PETRA III.

  6. Mobile dry pumping stations for PETRA III beamlines

    NASA Astrophysics Data System (ADS)

    Degenhardt, M.; Hahn, U.; Hesse, M.; Schütt, J.; Staa, R. v.

    2008-03-01

    The PETRA storage ring at DESY will be upgraded to a third generation synchrotron radiation source with 14 beamlines in the PETRA III project. Mobile pumping stations will be needed for the initial pump down of the beamlines and beamline components. They will also be provided for users to pump down their experimental chambers and include the possibility of leak detection and bake out control. Since the layout of the old pumping station design used at DORIS beamlines does not fulfil today's requirements, a new pumping station was developed. In contrast to the former design it has a dry pumping system and uses a by-pass of the turbo molecular pump for fast pump down of the attached vacuum chamber. The new control system is implemented as a binary sequential control, which runs on two CPLD-Chips (Complex Programmable Logical Device). It controls the pump down process, the bake out of the attached vacuum component, toggling of the roughing pump, and the blocking of reverse gas flow to prevent contamination of the vacuum system with particles. The pumping station is controlled via a local front panel and accessible via Ethernet for remote operation.

  7. The Nanoscience Beamline (I06) at Diamond Light Source

    SciTech Connect

    Dhesi, S. S.; Cavill, S. A.; Potenza, A.; Marchetto, H.; Mott, R. A.; Steadman, P.; Peach, A.; Shepherd, E. L.; Ren, X.; Wagner, U. H.; Reininger, R.

    2010-06-23

    The Nanoscience beamline (I06) is one of seven Diamond Phase-I beamlines which has been operational since January 2007 delivering polarised soft x-rays, for a PhotoEmission Electron Microscope (PEEM) and branchline, in the energy range 80-2100 eV. The beamline is based on a collimated plane grating monochromator with sagittal focusing elements, utilising two APPLE II helical undulator sources, and has been designed for high flux density at the PEEM sample position. A {approx}5 {mu}m ({sigma}) diameter beam is focussed onto the sample in the PEEM allowing a range of experiments using x-ray absorption spectroscopy (XAS), x-ray magnetic circular dichroism (XMCD) and x-ray magnetic linear dichroism (XMLD) as contrast mechanisms. The beamline is also equipped with a branchline housing a 6T superconducting magnet for XMCD and XMLD experiments. The magnet is designed to move on and off the branchline which allows a diverse range of experiments.

  8. The Diamond Beamline Controls and Data Acquisition Software Architecture

    NASA Astrophysics Data System (ADS)

    Rees, N.

    2010-06-01

    The software for the Diamond Light Source beamlines[1] is based on two complementary software frameworks: low level control is provided by the Experimental Physics and Industrial Control System (EPICS) framework[2][3] and the high level user interface is provided by the Java based Generic Data Acquisition or GDA[4][5]. EPICS provides a widely used, robust, generic interface across a wide range of hardware where the user interfaces are focused on serving the needs of engineers and beamline scientists to obtain detailed low level views of all aspects of the beamline control systems. The GDA system provides a high-level system that combines an understanding of scientific concepts, such as reciprocal lattice coordinates, a flexible python syntax scripting interface for the scientific user to control their data acquisition, and graphical user interfaces where necessary. This paper describes the beamline software architecture in more detail, highlighting how these complementary frameworks provide a flexible system that can accommodate a wide range of requirements.

  9. Remote access and automation of SPring-8 MX beamlines

    SciTech Connect

    Ueno, Go Hikima, Takaaki; Yamashita, Keitaro; Hirata, Kunio; Yamamoto, Masaki; Hasegawa, Kazuya; Murakami, Hironori; Furukawa, Yukito; Mizuno, Nobuhiro; Kumasaka, Takashi

    2016-07-27

    At SPring-8 MX beamlines, a remote access system has been developed and started user operation in 2010. The system has been developed based on an automated data collection and data management architecture utilized for the confirmed scheme of SPring-8 mail-in data collection. Currently, further improvement to the remote access and automation which covers data processing and analysis are being developed.

  10. The High Energy Materials Science Beamline (HEMS) at PETRA III

    SciTech Connect

    Schell, Norbert; King, Andrew; Beckmann, Felix; Ruhnau, Hans-Ulrich; Kirchhof, Rene; Kiehn, Ruediger; Mueller, Martin; Schreyer, Andreas

    2010-06-23

    The HEMS Beamline at the German high-brilliance synchrotron radiation storage ring PETRA III is fully tunable between 30 and 250 keV and optimized for sub-micrometer focusing. Approximately 70 % of the beamtime will be dedicated to Materials Research. Fundamental research will encompass metallurgy, physics and chemistry with first experiments planned for the investigation of the relationship between macroscopic and micro-structural properties of polycrystalline materials, grain-grain-interactions, and the development of smart materials or processes. For this purpose a 3D-microsctructure-mapper has been designed. Applied research for manufacturing process optimization will benefit from high flux in combination with ultra-fast detector systems allowing complex and highly dynamic in-situ studies of micro-structural transformations, e.g. during welding processes. The beamline infrastructure allows accommodation of large and heavy user provided equipment. Experiments targeting the industrial user community will be based on well established techniques with standardized evaluation, allowing full service measurements, e.g. for tomography and texture determination. The beamline consists of a five meter in-vacuum undulator, a general optics hutch, an in-house test facility and three independent experimental hutches working alternately, plus additional set-up and storage space for long-term experiments. HEMS is under commissioning as one of the first beamlines running at PETRA III.

  11. X-ray biomedical imaging beamline at SSRF

    NASA Astrophysics Data System (ADS)

    Xie, H.; Deng, B.; Du, G.; Fu, Y.; He, Y.; Guo, H.; Peng, G.; Xue, Y.; Zhou, G.; Ren, Y.; Wang, Y.; Chen, R.; Tong, Y.; Xiao, T.

    2013-08-01

    Since May 6, 2009, the X-ray biomedical imaging beamline at Shanghai Synchrotron Radiation Facility (SSRF) has been formally opened to users. The beamline is composed of a wiggler source with the intensity of magnetic field of 2.0 Tesla, a double crystal monochromator (DCM) cooled with liquid nitrogen, a 6-axis filter for high heat load reducing on the downstream optics such as Be window and DCM. The photon energy range for the monochromatic beam is 8-72.5keV. Three sets of digital X-ray detectors are provided to users with the pixel size range being 0.37-13μm. Several imaging methods such as micro-CT, in-line phase contrast imaging could be applied in biomedicine, material science and paleontology studies. The spatial resolution of 0.8μm and the temporal resolution of 1 ms could be realized. By the end of 2012, the beamline has provided more than 13900 hours beamtime for users, while over half of the research proposals come from biomedicine field. Nearly 2000 person-times have come and done their experiments at the beamline. More than 470 user proposals have been perfomed and more than 110 papers from users have been published. Some typical experimental results on biomedical applications will be introduced.

  12. Aberration analysis calculations for synchrotron radiation beamline design

    SciTech Connect

    McKinney, W.R.; Howells, M.; Padmore, H.A.

    1997-09-01

    The application of ray deviation calculations based on aberration coefficients for a single optical surface for the design of beamline optical systems is reviewed. A systematic development is presented which allows insight into which aberration may be causing the rays to deviate from perfect focus. A new development allowing analytical calculation of line shape is presented.

  13. Microbeam MAD Beamline for Challenging Protein Crystallography in TPS

    NASA Astrophysics Data System (ADS)

    Liu, D. G.; Chao, C. H.; Chang, C. H.; Juang, J. M.; Liu, C. Y.; Chang, S. H.; Chang, C. F.; Chou, C. K.; Tseng, C. C.; Chiang, C. H.; Jean, Y. C.; Tang, M. T.; Chung, S. C.; Chang, S. L.

    2013-03-01

    The TPS-05A beamline is the first X-ray beamline at NSRRC built for micro protein crystallography experiment as well as one of the seven ID beamlines in phase I at the TPS synchrotron facility. A 2-meter in-vacuum undulator (IU22) serves as the photon source from which the harmonics #3 to #9 will provide brilliance of 1018-1020 photons s-1 mrad-2 mm-2 (0.1% bandwidth)-1 and photon flux of 1013-1014 photons s-1 (0.1% bandwidth)-1 in the required energy range of 5.7-20 keV (2.175-0.620 Å) to cover MAD phasing experiments at 1 Å and SAD phasing experiments at 2 Å. The beamline optics consists of a cryo-cooled double crystal monochromator (DCM) and a pair of focusing K-B mirrors. Requirements from the user group include a target focus size of 50 μm × 50 μm (H × V) at the sample position, photon flux greater than 2 × 1012 photons s-1 at Se K-edge (0.9795 Å), pinholes for adjusting the beam size down to 5 μm. Calculation of heat load for the first optical element, i.e. the first crystal of DCM, is included in this paper.

  14. Neutral beamline with improved ion-energy recovery

    SciTech Connect

    Dagenhart, W.K.; Haselton, H.H.; Stirling, W.L.; Whealton, J.H.

    1981-04-13

    A neutral beamline generator with unneutralized ion energy recovery is provided which enhances the energy recovery of the full energy ion component of the beam exiting the neutralizer cell of the beamline. The unneutralized full energy ions exiting the neutralizer are deflected from the beam path and the electrons in the cell are blocked by a magnetic field applied transverse to the beamline in the cell exit region. The ions, which are generated at essentially ground potential and accelerated through the neutralizer cell by a negative acceleration voltage, are collected at ground potential. A neutralizer cell exit end region is provided which allows the magnetic and electric fields acting on the exiting ions to be closely coupled. As a result, the fractional energy ions exiting the cell with the full energy ions are reflected back into the gas cell. Thus, the fractional energy ions do not detract from the energy recovery efficiency of full energy ions exiting the cell which can reach the ground potential interior surfaces of the beamline housing.

  15. Canadian macromolecular crystallography facility: a suite of fully automated beamlines.

    PubMed

    Grochulski, Pawel; Fodje, Michel; Labiuk, Shaunivan; Gorin, James; Janzen, Kathryn; Berg, Russ

    2012-06-01

    The Canadian light source is a 2.9 GeV national synchrotron radiation facility located on the University of Saskatchewan campus in Saskatoon. The small-gap in-vacuum undulator illuminated beamline, 08ID-1, together with the bending magnet beamline, 08B1-1, constitute the Canadian Macromolecular Crystallography Facility (CMCF). The CMCF provides service to more than 50 Principal Investigators in Canada and the United States. Up to 25% of the beam time is devoted to commercial users and the general user program is guaranteed up to 55% of the useful beam time through a peer-review process. CMCF staff provides "Mail-In" crystallography service to users with the highest scored proposals. Both beamlines are equipped with very robust end-stations including on-axis visualization systems, Rayonix 300 CCD series detectors and Stanford-type robotic sample auto-mounters. MxDC, an in-house developed beamline control system, is integrated with a data processing module, AutoProcess, allowing full automation of data collection and data processing with minimal human intervention. Sample management and remote monitoring of experiments is enabled through interaction with a Laboratory Information Management System developed at the facility.

  16. Nuclear resonant scattering beamline at the Advanced Photon Source

    SciTech Connect

    Alp, E.E.; Mooney, T.M.; Toellner, T.; Sturhahn, W.

    1993-09-01

    The principal and engineering aspects of a dedicated synchrotron radiation beamline under construction at the Advanced Photon Source for nuclear resonant scattering purposes are explained. The expected performance in terms of isotopes to be studied, flux, and timing properties is discussed.

  17. The Nanoscience Beamline (I06) at Diamond Light Source

    NASA Astrophysics Data System (ADS)

    Dhesi, S. S.; Cavill, S. A.; Potenza, A.; Marchetto, H.; Mott, R. A.; Steadman, P.; Peach, A.; Shepherd, E. L.; Ren, X.; Wagner, U. H.; Reininger, R.

    2010-06-01

    The Nanoscience beamline (I06) is one of seven Diamond Phase-I beamlines which has been operational since January 2007 delivering polarised soft x-rays, for a PhotoEmission Electron Microscope (PEEM) and branchline, in the energy range 80-2100 eV. The beamline is based on a collimated plane grating monochromator with sagittal focusing elements, utilising two APPLE II helical undulator sources, and has been designed for high flux density at the PEEM sample position. A ˜5 μm (σ) diameter beam is focussed onto the sample in the PEEM allowing a range of experiments using x-ray absorption spectroscopy (XAS), x-ray magnetic circular dichroism (XMCD) and x-ray magnetic linear dichroism (XMLD) as contrast mechanisms. The beamline is also equipped with a branchline housing a 6T superconducting magnet for XMCD and XMLD experiments. The magnet is designed to move on and off the branchline which allows a diverse range of experiments.

  18. A synchrotron beamline for delivering high purity vacuum ultraviolet photons

    SciTech Connect

    Cavasso Filho, R. L.; Homen, M. G. P.; Fonseca, P. T.; Naves de Brito, A.

    2007-11-15

    We report on the current status and performance of the toroidal grating monochromator beamline at the Brazilian Synchrotron Light Laboratory (Laboratorio Nacional de Luz Sincrotron). This beamline provides photons in the vacuum ultraviolet and soft x-ray regions from 12 to 330 eV with three interchangeable gratings. We report on the improvement, which allows the possibility of choosing the light polarization degree from linear to almost circular. Here, we also describe the development of a new apparatus, namely, the mirror-inserted harmonic attenuator and calibrating-device with a long length (MIRHACLLE). All beamlines based on diffraction gratings suffer from the problem of high harmonics contaminations to some extent. The MIRHACLLE provides a way to efficiently suppress high harmonics from 25% to 1 ppm in a grazing incidence bending magnet beamline. Its principle of operation relays on the absorption of the high energy photons in a gas phase region. It allows negligible high harmonics contamination for photon energies ranging from 12 eV to the gas first ionization threshold, 21.6 eV, in the case of neon. We also demonstrate the possibility to use this device for energy calibration and resolution evaluation together with any experiment needing its filtering capabilities. The device is also very cost effective compared to other filters presented previously in the literature.

  19. Escherichia coli O111:H8 outbreak among teenage campers--Texas, 1999.

    PubMed

    2000-04-21

    In June 1999, the Tarrant County Health Department reported to the Texas Department of Health (TDH) that a group of teenagers attending a cheerleading camp during June 9-11 became ill with nausea, vomiting, severe abdominal cramps, and diarrhea, some of which was bloody. Two teenagers were hospitalized with hemolytic uremic syndrome (HUS), and two others underwent appendectomies. Routine stool cultures from eight ill persons failed to yield a pathogen. Stools subsequently were sent to laboratories at the Texas Department of Health and CDC, where Escherichia coli O111:H8 was isolated from two specimens. This report summarizes the investigation of this outbreak.

  20. The INE-Beamline for actinide science at ANKA

    SciTech Connect

    Rothe, J.; Dardenne, K.; Denecke, M. A.; Kienzler, B.; Loeble, M.; Metz, V.; Steppert, M.; Vitova, T.; Geckeis, H.; Butorin, S.; Seibert, A.; Walther, C.

    2012-04-15

    Since its inauguration in 2005, the INE-Beamline for actinide research at the synchrotron source ANKA (KIT North Campus) provides dedicated instrumentation for x-ray spectroscopic characterization of actinide samples and other radioactive materials. R and D work at the beamline focuses on various aspects of nuclear waste disposal within INE's mission to provide the scientific basis for assessing long-term safety of a final nuclear waste repository. The INE-Beamline is accessible for the actinide and radiochemistry community through the ANKA proposal system and the European Union Integrated Infrastructure Initiative ACTINET-I3. Experiments with activities up to 1 x 10{sup +6} times the European exemption limit are feasible within a safe but flexible containment concept. Measurements with monochromatic radiation are performed at photon energies varying between {approx}2.1 keV (P K-edge) and {approx}25 keV (Pd K-edge), including the lanthanide L-edges and the actinide M- and L3-edges up to Cf. The close proximity of the INE-Beamline to INE controlled area labs offers infrastructure unique in Europe for the spectroscopic and microscopic characterization of actinide samples. The modular beamline design enables sufficient flexibility to adapt sample environments and detection systems to many scientific questions. The well-established bulk techniques x-ray absorption fine structure (XAFS) spectroscopy in transmission and fluorescence mode have been augmented by advanced methods using a microfocused beam, including (confocal) XAFS/x-ray fluorescence detection and a combination of (micro-)XAFS and (micro-)x-ray diffraction. Additional instrumentation for high energy-resolution x-ray emission spectroscopy has been successfully developed and tested.

  1. Examination of H8 and B8 leadscrews from Three Mile Island Unit 2 (TMI-2)

    SciTech Connect

    Vinjamuri, K.; Akers, D.W.; Hobbins, R.R.

    1985-09-01

    Visual examinations, preliminary temperature estimates, and chemical and radiological analyses were conducted on samples removed from the control rod drive leadscrews. Hardness measurements and microstructure analysis suggest that significant temperature differences existed between the portions of the leadscrews closest to the bottom and top of the plenum assembly. Preliminary analysis indicates that the temperatures ranged from 666 to 1255/sup 0/K (740 to 1800/sup 0/F) for H8 and 723 to 1033/sup 0/K (842 to 1400/sup 0/F) for B8. The uncertainty in the temperature estimates is about +-28 to 56/sup 0/K (+-50 to 100/sup 0/F). Chemical analyses indicate that UO/sub 2/ and zirconium were deposited to a greater extent on surfaces closer to the core. Radiological analyses suggest that a number of the H8 radionuclides are insoluble in strong acid solutions. In contrast, more of the B8 radionuclides are soluble in strong acidic solutions. Also, an axial gradient in surface radionuclide concentrations was observed, with the highest concentration near the top of the plenum assembly. The data indicate changes in chemical composition and gradients in the surface radionuclide concentrations in the plenum assembly. As extrapolated from leadscrew data, the fractions of total core inventory of radionuclides retained on the plenum assembly surfaces are small (<2%).

  2. Beamline 9.3.2 - a high-resolution, bend-magnet beamline with circular polarization capability

    SciTech Connect

    Moler, E.J.; Hussain, Z.; Howells, M.R.

    1997-04-01

    Beamline 9.3.2 is a high resolution, SGM beamline on an ALS bending magnet with access to photon energies from 30-1500 eV. Features include circular polarization capability, a rotating chamber platform that allows switching between experiments without breaking vacuum, an active feedback system that keeps the beam centered on the entrance slit of the monochromator, and a bendable refocusing mirror. The beamline optics consist of horizontally and vertically focussing mirrors, a Spherical Grating Monochromator (SGM) with movable entrance and exit slits, and a bendable refocussing mirror. In addition, a movable aperature has been installed just upstream of the vertically focussing mirror which can select the x-rays above or below the plane of the synchrotron storage ring, allowing the user to select circularly or linearly polarized light. Circularly polarized x-rays are used to study the magnetic properties of materials. Beamline 9.3.2 can supply left and right circularly polarized x-rays by a computer controlled aperture which may be placed above or below the plane of the synchrotron storage ring. The degree of linear and circular polarization has been measured and calibrated.

  3. Reactive Spark Plasma Sintering (SPS) of Nitride Reinforced Titanium Alloy Composites (Postprint)

    DTIC Science & Technology

    2014-08-15

    AFRL-RX-WP-JA-2014-0177 REACTIVE SPARK PLASMA SINTERING (SPS) OF NITRIDE REINFORCED TITANIUM ALLOY COMPOSITES (POSTPRINT) Jaimie S...titanium–vanadium alloys, has been achieved by introducing reactive nitrogen gas during the spark plasma sintering (SPS) of blended titanium and...lcomReactive spark plasma sintering (SPS) of nitride reinforced titanium alloy compositeshttp://dx.doi.org/10.1016/j.jallcom.2014.08.049 0925-8388

  4. Instrumentation and Experimental Developments for the Beamlines at the Synchrotron SOLEIL

    SciTech Connect

    Prigent, P.; Bac, S.; Blanchandin, S.; Cauchon, G.; David, G.; Fernandez Varela, P.; Kubsky, S.; Picca, F.

    2010-06-23

    This paper presents an overview of the instrumentation and experiments developed for the beamlines at Synchrotron SOLEIL in France. Currently fourteen beamlines are opened to users out of the twenty six scheduled. About half of the beamlines cover the soft x-rays region using spectroscopy and imagery techniques. The second half covers the hard x-rays field studying diffraction of matter. Some sample environments carried out for beamlines, for biology, chemistry and surface sciences are described. For the soft x-rays beamlines, carbon contamination of optics is a crucial issue. Different experiments are currently under study in order to reduce or even avoid this effect. Other studies relate to the improvement of metrological methods for beamline optics, to the reduction of vibrational effects for the microbeams and development of computer control for diffractometers. The various types of instruments and experiments will be presented both with an overview of the status of the beamlines in operation and under construction.

  5. Development of a short form Social Interaction Anxiety (SIAS) and Social Phobia Scale (SPS) using nonparametric item response theory: the SIAS-6 and the SPS-6.

    PubMed

    Peters, Lorna; Sunderland, Matthew; Andrews, Gavin; Rapee, Ronald M; Mattick, Richard P

    2012-03-01

    Shortened forms of the Social Interaction Anxiety Scale (SIAS) and the Social Phobia Scale (SPS) were developed using nonparametric item response theory methods. Using data from socially phobic participants enrolled in 5 treatment trials (N = 456), 2 six-item scales (the SIAS-6 and the SPS-6) were developed. The validity of the scores on the SIAS-6 and the SPS-6 was then tested using traditional methods for their convergent validity in an independent clinical sample and a student sample, as well as for their sensitivity to change and diagnostic sensitivity in the clinical sample. The scores on the SIAS-6 and the SPS-6 correlated as well as the scores on the original SIAS and SPS, with scores on measures of related constructs, discriminated well between those with and without a diagnosis of social phobia, providing cutoffs for diagnosis and were as sensitive to measuring change associated with treatment as were the SIAS and SPS. Together, the SIAS-6 and the SPS-6 appear to be an efficient method of measuring symptoms of social phobia and provide a brief screening tool.

  6. Satellite Power Systems (SPS) concept definition study exhibit C. Volume 3: Experimental verification definition

    NASA Technical Reports Server (NTRS)

    1979-01-01

    An environmentally oriented microwave technology exploratory research program aimed at reducing the uncertainty associated with microwave power system critical technical issues is described. Topics discussed include: (1) Solar Power Satellite System (SPS) development plan elements; (2) critical technology issues related to the SPS preliminary reference configuration; (3) pilot plant to demonstrate commercial viability of the SPS system; and (4) research areas required to demonstrate feasibility of the SPS system. Progress in the development of advanced GaAs solar cells is reported along with a power distribution subsystem.

  7. SpS5 - III. Matter ejection and feedback

    NASA Astrophysics Data System (ADS)

    Nazé, Yaël; Che, Xiao; Cox, Nick L. J.; Groh, José H.; Guerrero, Martin; Kervella, Pierre; Lee, Chien-De; Matsuura, Mikako; Oey, M. Sally; Stringfellow, Guy S.; Wachter, Stephanie

    2015-03-01

    The last part of SpS5 dealt with the circumstellar environment. Structures are indeed found around several types of massive stars, such as blue and red supergiants, as well as WRs and LBVs. As shown in the last years, the potential of IR for their study is twofold: first, IR can help discover many previously unknown nebulae, leading to the identification of new massive stars as their progenitors; second, IR can help characterize the nebular features. Current and new IR facilities thus pave the way to a better understanding of the feedback from massive stars.

  8. Conceptual Design of a Dedicated SAXS Beamline at NSRRC

    NASA Astrophysics Data System (ADS)

    Liu, D. G.; Tseng, P. C.; Tsang, K. L.; Jeng, U.; Chang, C. H.; Fung, H. S.; Liu, C. Y.; Chung, S. C.; Tang, M. T.; Song, Y. F.; Liang, K. S.

    2007-01-01

    A dedicated small-angle X-ray scattering (SAXS) beamline using a new X-ray source generated by an In-Acromat superconducting wiggler (IASW6) insertion device is under construction at the National Synchrotron Radiation Research Center (NSRRC). The IASW6 with peak magnetic field of 3.1 T, magnet period of 6.1 cm, and total length of 96 cm, can provide a photon flux ˜ 1012 - 1013photons/s/0.1%bw in the energy range of 5 - 23 keV. Taking the central 0.2 mard horizontal radiation fan from the source with a beam divergence of 200 and 392 μrad in the vertical and horizontal directions, respectively, the dedicated SAXS beamline is oriented for nano to meso-structural research in soft matter, including liquid crystals, macromolecular solutions, polymers, as well as in nanoparticles, ceramic, and alloys. The SAXS beamline adopts the design of the double-monochromator used in the beamline SIYBLS at ALS, which integrates a Si(111) double crystal monochromator (DCM) and a Mo/B4C double multilayer monochromator (DMM) into one cradle for fast exchange between the two monochrmators. Equipped with a collimating mirror (CM) and a toroidal focusing mirror (FM) with 1:1 focusing ratio, this beamline provides two types of SAXS measurements: high-Q resolution and high flux, by using either the DCM or DMM. The SAXS beamline also provides energy scan with an energy resolution from 1 to 10 eV for anomalous SAXS (ASAXS) measurements. A specially coated reflecting mirror is also installed after FM to provide a suitable photon beam for grazing incident SAXS of liquid surfaces. Ray tracing simulation results show that at 8 keV and with DCM, a high quality photon beam of beam size (0.5 mm) and beam divergence (± 50 μrad) with a flux of ˜ 1011 photons/s can be obtained for high-Q resolution SAXS measurement. The photon flux can be increased by one order of magnitude when the DMM is used; however, the beam size and divergence are both slightly increased.

  9. Bacterial metabolism of arylsulfonates. I. Benzene sulfonate as growth substrate for Pseudomonas testosteroni H-8.

    PubMed

    Ripin, M J; Noon, K F; Cook, T M

    1971-03-01

    Pseudomonas testosteroni H-8 utilizes as sole carbon source benzene sulfonate (BS), p-toluene sulfonate (pTS), and ethylbenzene sulfonate (EBS) but not higher homologs. Growth on BS was rapid (generation time, 3 hr) and efficient (Y = 57), and resulted in accumulation of sulfate. As the culture is acid-sensitive, the medium must be heavily buffered to permit extensive growth. The BS oxidase system is inducible. Cells grown on BS, but not glutamate, oxidized BS, pTS, or EBS without lag (QO(2) = 50 to 100). Oxygen uptake on BS is temperature-dependent and sensitive to cyanide. Complete oxidation of 1 mumole of BS consumed approximately 5.7 mumoles of oxygen.

  10. Theoretical electron impact total cross sections for tetrahydrofuran (C4H8O)

    NASA Astrophysics Data System (ADS)

    Swadia, Mohit; Thakar, Yogesh; Vinodkumar, Minaxi; Limbachiya, Chetan

    2017-04-01

    We report electron impact total cross sections for tetrahydrofuran (C4H8O) from ionization threshold to 5 keV. We have employed Spherical Complex Optical Potential (SCOP) to calculate total cross sections QT, total inelastic cross sections Qinel and total elastic cross sections Qel and have used Complex Scattering Potential - ionization contribution (CSP-ic) formalisms to compute total ionization cross sections Qion and summed total excitation cross sections ∑ Qexc. We have compared our cross sections with available experimental as well as theoretical results and have found good agreement wherever available. This is the maiden attempt to report the total excitation cross sections for this target. Contribution to the Topical Issue "Low-Energy Interactions related to Atmospheric and Extreme Conditions", edited by S. Ptasinska, M. Smialek-Telega, A. Milosavljevic, B. Sivaraman.

  11. Comparative morphometric study of the australopithecine vertebral series Stw-H8/H41.

    PubMed

    Sanders, W J

    1998-03-01

    Lower spinal structure correlates well with positional behavior among mammals. Nonetheless, the functional morphology of the axial post-crania of australopithecines has received less attention than their appendicular skeletons. This paper presents a detailed description and comparative morphometric analysis of the australopithecine thoracolumbar vertebral series Stw-H8/H41, and examines spinal mechanics in early hominids. Stw-H8/H41 is an important specimen, as the australopithecine vertebral sample is small, and vertebral series are more useful than isolated elements for the interpretation of spinal function. Results of the study support the interpretation that australopithecine species are highly sexually dimorphic. The study also reveals a considerable amount of morphometric variation other than size among australopithecine vertebrae, though the sample is too small and incomplete to ascertain whether this indicates significant interspecific differences in spinal function. Most importantly, structural and metric observations confirm that the morphology of the lower spine in australopithecines has no modern analogue in its entirety. Aspects of zygapophyseal structure, numerical composition of the lumbar region, and centrum wedging suggest that the australopithecine vertebral column was adapted to human-like intrinsic lumbar lordosis and stable balance of the trunk over the pelvis in sustained bipedal locomotion. However, relative centrum size in australopithecines indicates that either they had a different mechanism for channeling vertical forces through the vertebral column than humans, or differed behaviorally from humans in ways that produced smaller increments of compression across their centra. These findings have important implications for hypotheses of australopithecine positional behavior, and demonstrate that larger samples and more complete vertebral series are needed to improve our understanding of australopithecine spinal function.

  12. A Reanalysis of Single Photon Data at CERN SPS

    NASA Astrophysics Data System (ADS)

    Gale, Charles; Chatterjee, Rupa; Srivastava, Dinesh K.; Jeon, Sangyong

    2009-11-01

    We reanalyze the WA98 single photon data [M. M. Aggarwal et al. [WA98 Collaboration], Phys. Rev. Lett. 85, 3595 (2000)] at CERN SPS by incorporating several recent developments in the study of prompt and thermal photon production from relativistic heavy ion collisions [R. Chatterjee, D. K. Srivastava, and S. Jeon, Phys. Rev. C 79, 034906 (2009)]. Isospin and shadowing corrected NLO pQCD, along with an optimized scale for factorization, fragmentation and renormalization are considered for prompt photon production. Photons from thermal medium are estimated by considering a boost invariant azimuthally anisotropic hydrodynamic expansion of the plasma along with a well tested equation of state and initial conditions. A quantitative explanation of the data is obtained by combining κ× prompt with thermal photons, where κ is an overall scaling factor. We show that, elliptic flow of thermal photons can play a crucial role to distinguish between the ‘with’ and ‘without’ phase transition scenarios at SPS energy.

  13. SPS 'Fabric of the Cosmos' Science Cafés

    NASA Astrophysics Data System (ADS)

    Chakrabarti, A.

    2011-12-01

    Hosted by Brian Greene and based on his best selling book of the same title, The Fabric of the Cosmos is a new four part NOVA series that explores the deepest mysteries of space and time. The program was kicked off by more than 30 'Cosmic Cafes' around the country, as part of a Society of Physics Students, NOVA outreach effort funded by an NSF grant. A Cosmic Café is a science café based on the topics discussed in The Fabric of the Cosmos. Science cafes are open events for non-scientists, where they can have an informal discussion with a scientist in a very casual location, usually a restaurant, coffee shop, or a bar. During the summer I assisted in planning this kick off, by reviewing science café and The Fabric of the Cosmos resources and suggesting revisions to make them more relevant for an SPS audience. I also organized and moderated the first Cosmic Café. The café that I organized was discussion based, with the speaker, Dr. James Gates, starting with a short talk and then opening up the floor for questions. Organizing a Cosmic Café gave me first-hand experience with the challenges an SPS chapter might face while organizing a café themselves. I will discuss lessons learned and the effectiveness of the first ever themed science café blitz.

  14. SPS ionosphere/microwave beam interactions: Arecibo experimental studies

    SciTech Connect

    Duncan, L.M.

    1980-10-01

    The purpose of this program is to determine the environmental impacts associated with the operation of the proposed SPS microwave power transmission system. It is expected that thermal effects will provide the dominant force driving the nonlinear ionosphere/microwave beam interactions. Collisional damping of radio waves, producing ohmic heating of the ionospheric plasma, depends inversely on the square of the radio wave frequency. Therefore, equivalent heating and equivalent thermal forces can be generated at lower radiated power densities by using lower radio wave frequencies. This principle is fundamental to a large part of the experimental program. An understanding of the physics of the specific interactions excited by the SPS microwave beam is also an important part of the assessment program. This program is designed to determine instability thresholds, the growth rates and spatial extent of the resultant ionospheric disturbances, and the frequency and power dependences of the interactions. How these interactions are affected by variations in the natural ionospheric conditions, how different instabilities occurring simultaneously may affect each other, and how distinct microwave beams might mutually interact are studied. Status of the program is described. (WHK)

  15. The SHiP experiment at CERN SPS

    NASA Astrophysics Data System (ADS)

    Di Crescenzo, A.; SHiP Collaboration

    2016-01-01

    SHiP is a new general purpose fixed target facility, whose Technical Proposal has been recently submitted to the CERN SPS Committee. In its initial phase, the 400GeV proton beam extracted from the SPS will be dumped on a heavy target with the aim of integrating 2×1020 pot in 5years. A dedicated detector located downstream of the target, based on a long vacuum tank followed by a spectrometer and particle identification detectors, will allow probing a variety of models with light long-lived exotic particles and masses below a few GeV/c2. The beam dump is also an ideal source of tau neutrinos, the less known particle in the Standard Model. Another dedicated detector, based on the Emulsion Cloud Chamber technology already used in the OPERA experiment, will allow to perform for the first time measurements of the tau neutrino deep inelastic scattering cross section. Tau neutrinos will be distinguished from tau anti-neutrinos, thus providing the first observation of the tau anti-neutrino.

  16. Active retrodirective arrays for SPS beam pointing. [phase conjugation

    NASA Technical Reports Server (NTRS)

    Chernoff, R.

    1980-01-01

    The basic requirement of the SPS beam pointing system is that it deliver a certain amount of S-band (lambda = 12.5 cm) power to a 9.6 km diameter receiving rectenna on the ground. The power is transmitted from a 1.0 km diameter antenna array on the SPS, which is, for a rectenna at about plus or minus 40 deg. latitude, some 37.5x10 to the 6th power km distant. At the present time ARA's appear to be the best bet to realize this very stringent beam pointing requirement. An active retrodirective array (ARA) transmits a beam towards the apparent source of an illuminating signal called the pilot. The array produces, not merely reflects, RF power. Retrodirectivity is achieved by retransmitting from each element of the array a signal whose phase is the "conjugate" of that received by the element. Phase conjugate circuits and pointing errors in ARA's are described. Results obtained using a 2-element X-band ARA and an 8-element S-band ARA are included.

  17. Magnetic shielding tests for MFTF-B neutral beamlines

    SciTech Connect

    Kerns, J.; Fabyan, J.; Wood, R.; Koger, P.

    1983-11-16

    A test program to determine the effectiveness of various magnetic shielding designs for MFTF-B beamlines was established at Lawrence Livermore National Laboratory (LLNL). The proposed one-tenth-scale shielding-design models were tested in a uniform field produced by a Helmholtz coil pair. A similar technique was used for the MFTF source-injector assemblies, and the model test results were confirmed during the Technology Demonstration in 1982. The results of these tests on shielding designs for MFTF-B had an impact on the beamline design for MFTF-B. The iron-core magnet and finger assembly originally proposed were replaced by a simple, air-core, race-track-coil, bending magnet. Only the source injector needs to be magnetically shielded from the fields of approximately 400 gauss.

  18. Simulations of proton beam characteristics for ELIMED Beamline

    NASA Astrophysics Data System (ADS)

    Psikal, Jan; Limpouch, Jiri; Klimo, Ondrej; Vyskocil, Jiri; Margarone, Daniele; Korn, Georg

    2016-03-01

    ELIMED Beamline should demonstrate the capability of laser-based particle accelerators for medical applications, mainly for proton radiotherapy of tumours which requires a sufficient number of accelerated protons with energy about 60 MeV at least. In this contribution, we study the acceleration of protons by laser pulse with parameters accessible for ELIMED Beamline (intensity ∼ 1022 W/cm2, pulse length ∼ 30 fs). In our two-dimensional particle-incell simulations, we observed higher energies of protons for linear than for circular polarization. Oblique incidence of the laser pulse on target does not seem to be favourable for proton acceleration at such high intensities as the accelerated protons are deflected from target normal axis and their energy and numbers are slightly decreased. The expected numbers of accelerated protons in the energy interval 60 MeV ± 5% are calculated between 109 and 1010 per laser shot with estimated proton beam divergence about 20° (FWHM).

  19. Status of the crystallography beamlines at synchrotron SOLEIL⋆

    NASA Astrophysics Data System (ADS)

    Coati, A.; Chavas, L. M. G.; Fontaine, P.; Foos, N.; Guimaraes, B.; Gourhant, P.; Legrand, P.; Itie, J.-P.; Fertey, P.; Shepard, W.; Isabet, T.; Sirigu, S.; Solari, P.-L.; Thiaudiere, D.; Thompson, A.

    2017-04-01

    Synchrotron SOLEIL (www.synchrotron-soleil.fr) is the French national centre for synchrotron radiation research, and has been open, for user applications, since 2008. Operating at an energy of 2.75GeV, injected current of 500mA, with an excellent beam stability of < 1 micron at the source position and beam "top up", and with a high proportion of straight sections for the ring circumference, SOLEIL offers a wide range of possibilities for diffraction experiments. The beamlines serving crystallographic communities are listed, along with their area of expertise and available equipment. A detailed description of the design of the PROXIMA 1 beamline for macromolecular crystallography is given, and an example of an (unsuccessful but significant) experiment is given.

  20. The LNLS soft X-ray spectroscopy beamline.

    PubMed

    Tolentino, H; Compagnon-Cailhol, V; Vicentin, F C; Abbate, M

    1998-05-01

    The soft X-ray spectroscopy beamline installed at a bending-magnet source at the LNLS is described. The optics are designed to cover energies from 800 to 4000 eV with good efficiency. The focusing element is a gold-coated toroidal mirror with an angle of incidence of 17 mrad. The UHV double-crystal monochromator has three pairs of crystals, Si (111), InSb (111) and beryl (101;0), that can be selected by a sliding movement. The UHV workstation is equipped with an ion gun, an electron gun, an electron analyser, LEED optics, an open channeltron and a photodiode array. This beamline is intended for photoemission, photoabsorption, reflectivity and dichroism experiments.

  1. The crystallography beamline I711 at MAX II.

    PubMed

    Cerenius, Y; Ståhl, K; Svensson, L A; Ursby, T; Oskarsson, A; Albertsson, J; Liljas, A

    2000-07-01

    A new X-ray crystallographic beamline is operational at the MAX II synchrotron in Lund. The beamline has been in regular use since August 1998 and is used both for macro- and small molecule diffraction as well as powder diffraction experiments. The radiation source is a 1.8 T multipole wiggler. The beam is focused vertically by a bendable mirror and horizontally by an asymmetrically cut Si(111) monochromator. The wavelength range is 0.8-1.55 A with a measured flux at 1 A of more than 10(11) photons s(-1) in 0.3 mm x 0.3 mm at the sample position. The station is currently equipped with a Mar345 imaging plate, a Bruker Smart 1000 area CCD detector and a Huber imaging-plate Guinier camera. An ADSC 210 area CCD detector is planned to be installed during 2000.

  2. The ID23-2 structural biology microfocus beamline at the ESRF

    PubMed Central

    Flot, David; Mairs, Trevor; Giraud, Thierry; Guijarro, Matias; Lesourd, Marc; Rey, Vicente; van Brussel, Denis; Morawe, Christian; Borel, Christine; Hignette, Olivier; Chavanne, Joel; Nurizzo, Didier; McSweeney, Sean; Mitchell, Edward

    2010-01-01

    The first phase of the ESRF beamline ID23 to be constructed was ID23-1, a tunable MAD-capable beamline which opened to users in early 2004. The second phase of the beamline to be constructed is ID23-2, a monochromatic microfocus beamline dedicated to macromolecular crystallography experiments. Beamline ID23-2 makes use of well characterized optical elements: a single-bounce silicon (111) monochromator and two mirrors in Kirkpatrick–Baez geometry to focus the X-ray beam. A major design goal of the ID23-2 beamline is to provide a reliable, easy-to-use and routine microfocus beam. ID23-2 started operation in November 2005, as the first beamline dedicated to microfocus macromolecular crystallography. The beamline has taken the standard automated ESRF macromolecular crystallography environment (both hardware and software), allowing users of ID23-2 to be rapidly familiar with the microfocus environment. This paper describes the beamline design, the special considerations taken into account given the microfocus beam, and summarizes the results of the first years of the beamline operation. PMID:20029119

  3. The Nanoscience Beamline at Diamond, Optical Design Considerations

    SciTech Connect

    Reininger, Ruben; Dhesi, Sarnjeet

    2007-01-19

    The main requirement of the Nanoscience Beamline at Diamond is to deliver the highest possible flux at the sample position of a PEEM with a resolving power of about 5000 in the energy range 80-2000 eV. The source of the beamline is a couple of APPLE II helical undulators in tandem that can also be used separately to allow for faster switching of the circular polarization. Based on its versatility, a collimated plane grating monochromator using sagittally focusing elements was chosen to cover the required energy range with three gratings. The operation of this monochromator requires a collimated beam incident on the grating along the dispersion direction. This can be achieved either with a toroid, focusing with its major radius along the non-dispersive direction at the exit slit, or with a sagittal cylinder. The former option uses a sagittal cylinder after the grating to focus the collimated beam at the exit slit. In the latter case, a toroid after the grating is used to focus in both directions at the exit slit. The advantage of the toroid downstream the grating is the higher horizontal demagnification. This configuration fulfills the Nanoscience Beamline's required resolving power but cannot be used to achieve very high resolution due to the astigmatic coma aberration of the toroidal mirror. The focusing at the sample position is performed with a KB pair of plane elliptical mirrors. Assuming achievable values for the errors on all the optical surfaces, the expected spots FWHW in the horizontal and vertical directions are 10 {mu}m and 3 {mu}m, respectively. The calculated photon flux at this spot at 5000 resolving power is >1012 photons/sec between 80 and 1600 eV for linearly polarized light and between 106 and 1200 eV for circularly polarized light. The beamline is expected to be operational in January 2007.

  4. The Nanoscience Beamline at Diamond, Optical Design Considerations

    NASA Astrophysics Data System (ADS)

    Reininger, Ruben; Dhesi, Sarnjeet

    2007-01-01

    The main requirement of the Nanoscience Beamline at Diamond is to deliver the highest possible flux at the sample position of a PEEM with a resolving power of about 5000 in the energy range 80-2000 eV. The source of the beamline is a couple of APPLE II helical undulators in tandem that can also be used separately to allow for faster switching of the circular polarization. Based on its versatility, a collimated plane grating monochromator using sagittally focusing elements was chosen to cover the required energy range with three gratings. The operation of this monochromator requires a collimated beam incident on the grating along the dispersion direction. This can be achieved either with a toroid, focusing with its major radius along the non-dispersive direction at the exit slit, or with a sagittal cylinder. The former option uses a sagittal cylinder after the grating to focus the collimated beam at the exit slit. In the latter case, a toroid after the grating is used to focus in both directions at the exit slit. The advantage of the toroid downstream the grating is the higher horizontal demagnification. This configuration fulfills the Nanoscience Beamline's required resolving power but cannot be used to achieve very high resolution due to the astigmatic coma aberration of the toroidal mirror. The focusing at the sample position is performed with a KB pair of plane elliptical mirrors. Assuming achievable values for the errors on all the optical surfaces, the expected spots FWHW in the horizontal and vertical directions are 10 μm and 3 μm, respectively. The calculated photon flux at this spot at 5000 resolving power is >1012 photons/sec between 80 and 1600 eV for linearly polarized light and between 106 and 1200 eV for circularly polarized light. The beamline is expected to be operational in January 2007.

  5. An Undulator-Wiggler Beamline for Spectromicroscopy at SRC

    SciTech Connect

    Reininger, R.; De Stasio, G.; Bissen, M.; Severson, M.

    2004-05-12

    A high-flux medium-energy-resolution beamline based on an existing insertion device is being constructed at SRC. The insertion device will be operated as an undulator up to {approx}400 eV and as a wiggler at higher energies. The beamline will be dedicated mainly to X-ray PhotoElectron Emission spectroMicroscopy (X-PEEM) and will cover the energy range 75-2000 eV. The most relevant requirement for high-resolution and high-sensitivity X-PEEM is a high flux density on the sample surface. This will allow spatial resolutions on the order of a few nanometers, and a minimum detection limit on the order of 10 parts per million, using the already existing Spectromicroscope for PHotoelectron Imaging of Nanostructures with X-rays (SPHINX). To maximize the flux at the sample position, the beamline does not include an entrance slit and has only three optical elements on the beam path: an ellipsoidal mirror, a variable-line-spacing plane grating, and a re-focusing ellipsoidal mirror. The first ellipsoidal mirror provides the converging light to one of the three gratings needed to cover the beamline energy range. The position of the fixed exit slit is at the focus of the ellipsoidal mirror when the grating is tuned to zero order. The second ellipsoidal mirror demagnifies the beam at the exit slit plane by a factor of two. More than 1012 photons/s are expected at the sample position between 100 and 1200 eV onto a spot having a FWHM of 25 {mu}m vertical and 70 {mu}m horizontal at a resolving power of {approx}1000.

  6. Real-time Optimization of an Ion Optical Beamline

    NASA Astrophysics Data System (ADS)

    Schillaci, Zachary; Amthor, Matthew; Morrissey, Dave; Portillo, Mauricio; Schwarz, Stefan; Steiner, Mathias; Sumithrarachchi, Chandana

    2015-10-01

    We have developed an experimental approach to automatically adjust multiple electrostatic and/or magnetic elements on an ion optical beamline, while analyzing the profile of the beam on a detector at the image point, until an optimal tune is found. This approach dramatically simplifies beamline tuning, thus allowing more efficient use of experimental equipment; ensures a more optimal tune is found, providing a more focused beam spot without a significant loss of beam transmission; and will allow the development of specialized optical tunes based on the needs of any given experiment. The approach was tested directly on the D-Line at the National Superconducting Cyclotron Laboratory at Michigan State University in several real-time optimization runs. The initial experiments demonstrate the ability of the optimizer to focus the beam while preserving transmission, ultimately halving σx and σy of the beam spot within a one-hour optimization run relative to that produced through a manual tweak of a model based tune. With further research we plan to generalize the approach to work on any given beamline, including particularly for higher order tunes of fragment separators. NSF REU Grant #PHY-1156964 and NSF Grant #PHY-1102511.

  7. Design and Simulation of the nuSTORM Pion Beamline

    SciTech Connect

    Liu, A.; Neuffer, D.; Bross, A.

    2015-08-15

    The nuSTORM (neutrinos from STORed Muons) proposal presents a detailed design for a neutrino facility based on a muon storage ring, with muon decay in the production straight section of the ring providing well defined neutrino beams. The facility includes a primary high-energy proton beam line, a target station with pion production and collection, and a pion beamline for pion transportation and injection into a muon decay ring. The nuSTORM design uses “stochastic injection”, in which pions are directed by a chicane, referred to as the Orbit Combination Section (OCS), into the production straight section of the storage ring. Pions that decay within that straight section provide muons within the circulating acceptance of the ring. Furthermore, the design enables injection without kickers or a separate pion decay transport line. The beam line that the pions traverse before being extracted from the decay ring is referred to as the pion beamline. Our paper describes the design and simulation of the pion beamline, and includes full beam dynamics simulations of the system.

  8. Design and Simulation of the nuSTORM Pion Beamline

    DOE PAGES

    Liu, A.; Neuffer, D.; Bross, A.

    2015-08-15

    The nuSTORM (neutrinos from STORed Muons) proposal presents a detailed design for a neutrino facility based on a muon storage ring, with muon decay in the production straight section of the ring providing well defined neutrino beams. The facility includes a primary high-energy proton beam line, a target station with pion production and collection, and a pion beamline for pion transportation and injection into a muon decay ring. The nuSTORM design uses “stochastic injection”, in which pions are directed by a chicane, referred to as the Orbit Combination Section (OCS), into the production straight section of the storage ring. Pionsmore » that decay within that straight section provide muons within the circulating acceptance of the ring. Furthermore, the design enables injection without kickers or a separate pion decay transport line. The beam line that the pions traverse before being extracted from the decay ring is referred to as the pion beamline. Our paper describes the design and simulation of the pion beamline, and includes full beam dynamics simulations of the system.« less

  9. Nanotomography endstation at the P05 beamline: Status and perspectives

    NASA Astrophysics Data System (ADS)

    Greving, I.; Ogurreck, M.; Marschall, F.; Last, A.; Wilde, F.; Dose, T.; Burmester, H.; Lottermoser, L.; Müller, M.; David, C.; Beckmann, F.

    2017-06-01

    The Imaging Beamline IBL/P05 at the DESY storage ring PETRA III, operated by the Helmholtz-Zentrum Geesthacht, has two dedicated endstations optimized for micro- and nanotomography experiments [1-3]. Here we present the status of the nanotomography endstation, highlight the latest instrumentation upgrades and present first experimental results. In particular in materials science, where structures with ceramics or metallic materials are of interest, X-ray energies of 15 keV and above are required even for sample sizes of several 10 μm in diameter. The P05 imaging beamline is dedicated to materials science and is designed to allow for imaging applications with X-ray energies of 10 to 50 keV. In addition to the full field X-ray microscopy setup, the layout of the nanotomography endstation allows switching to cone-beam configuration. Kinematics for X-ray optics like compound refractive lenses (CRLs), Fresnel zone plates (FZP) or beam-shaping optics are implemented and the installation of a Kirkpatrick Baez-mirror (KB mirror) system is foreseen at a later stage of the beamline development. Altogether this leads to a high flexibility of the nanotomography setup such that the instrument can be tailored to the specific experimental requirements of a range of sample systems.

  10. MERLIN - A meV Resolution Beamline at the ALS

    SciTech Connect

    Reininger, Ruben; Bozek, John; Chuang, Y.-D.; Howells, Malcolm; Kelez, Nicholas; Prestemon, Soren; Marks, Steve; Warwick, Tony; Hussain, Zahid; Jozwiak, Chris; Lanzara, Alessandra; Hasan, M. Zahid

    2007-01-19

    An ultra-high resolution beamline is being constructed at the Advanced Light Source (ALS) for the study of low energy excitations in strongly correlated systems with the use of high-resolution inelastic scattering and angle-resolved photoemission. This new beamline, given the acronym Merlin (for meV resolution line), will cover the energy range 10-150 eV. The monochromator has fixed entrance and exit slits and a plane mirror that can illuminate a spherical grating at the required angle of incidence (as in the SX-700 mechanism). The monochromator can be operated in two different modes. In the highest resolution mode, the energy scanning requires translating the monochromator chamber (total travel 1.1 m) as well as rotating the grating and the plane mirror in front of the grating. The resolution in this mode is practically determined by the slits width. In the second mode, the scanning requires rotating the grating and the plane mirror. This mode can be used to scan a few eV without a significant resolution loss. The source for the beamline is a 1.9 m long, 90 mm period quasi periodic EPU. The expected flux at the sample is higher than 1011 photons/s at a resolving power of 5 x 104 in the energy range 16-130 eV. A second set of gratings can be used to obtain higher flux at the expense of resolution.

  11. The Imaging and Coherence Beamline I13 at Diamond

    SciTech Connect

    Rau, C.; Wagner, U.; Pesic, Z.

    2011-09-09

    The coherence and imaging beamline I13 is dedicated to hard x-ray imaging on the micro- and nano-lengthscale, performing microscopy either in direct or reciprocal space. For both, lens-based and lensless imaging, two independent stations will be operated in a separate building at a distance of 250 m from the source. The imaging branch will perform in-line phase contrast imaging and tomography over a large field of view in the 6- to 35-keV energy range. In addition, it will be possible to switch to full-field microscopy with 50-nm spatial resolution. Other microscopies will be developed according to the scientific needs. Resolution beyond the limitations given by the detector and x-ray optics will be achieved with techniques working in the far field. Coherent x-ray diffraction (CXRD) and other coherent diffraction imaging techniques such as ptychography will also be implemented on the same 'coherence' branch. The beamline hosts a number of innovative features such as the so-called 'mini-beta' layout for electron optics in the storage ring or new concepts for beamline instrumentation. The stations will be operational in 2011.

  12. Confining continuous manipulations of accelerator beam-line optics

    NASA Astrophysics Data System (ADS)

    Amstutz, Ph.; Plath, T.; Ackermann, S.; Bödewadt, J.; Lechner, C.; Vogt, M.

    2017-04-01

    Altering the optics in one section of a linear accelerator beam line will in general cause an alteration of the optics in all downstream sections. In circular accelerators, changing the optical properties of any beam-line element will have an impact on the optical functions throughout the whole machine. In many cases, however, it is desirable to change the optics in a certain beam-line section without disturbing any other parts of the machine. Such a local optics manipulation can be achieved by adjusting a number of additional corrector magnets that restore the initial optics after the manipulated section. In that case, the effect of the manipulation is confined in the region between the manipulated and the correcting beam-line elements. Introducing a manipulation continuously, while the machine is operating, therefore requires continuous correction functions to be applied to the correcting quadrupole magnets. In this paper, we present an approach to calculate such continuous correction functions for six quadrupole magnets by means of a homotopy method. Besides a detailed derivation of the method, we present its application to an algebraic example, as well as its demonstration at the seeding experiment sFLASH at the free-electron laser FLASH located at DESY in Hamburg.

  13. SIBYLS - A SAXS and protein crystallography beamline at the ALS

    SciTech Connect

    Trame, Christine; MacDowell, Alastair A.; Celestre, Richard S.; Padmore, Howard A.; Cambie, Daniella; Domning, Edward E.; Duarte, Robert M.; Kelez, Nicholas; Plate, David W.; Holton, James M.; Frankel, Kenneth; Tsutakawa, Susan; Tsuruta, Hiro; Tainer, John A.; Cooper, Priscilla K.

    2003-08-22

    The new Structurally Integrated BiologY for Life Sciences (SIBYLS) beamline at the Advanced Light Source will be dedicated to Macromolecular Crystallography (PX) and Small Angle X-ray Scattering (SAXS). SAXS will provide structural information of macromolecules in solutions and will complement high resolution PX studies on the same systems but in a crystalline state. The x-ray source is one of the 5 Tesla superbend dipoles recently installed at the ALS that allows for a hard x-ray program to be developed on the relatively low energy Advanced Light Source (ALS) ring (1.9 GeV). The beamline is equipped with fast interchangeable monochromator elements, consisting of either a pair of single Si(111) crystals for crystallography, or a pair of multilayers for the SAXS mode data collection (E/{Delta}E {approx} 1/110). Flux rates with Si(111) crystals for PX are measured as 2 x 10{sup 11} hv/sec/400 mA through a 100 {micro}m pinhole at 12.4 KeV. For SAXS the flux is up to 3 x 10{sup 13} photons/sec at 10 KeV with all apertures open when using the multilayer monochromator elements. The performance characteristics of this unique beamline will be described.

  14. Construction status of CXI beamline at PAL-XFEL

    NASA Astrophysics Data System (ADS)

    Park, Jaehyun; Nam, Ki-Hyun; Kim, Sangsoo; Kim, Bongsoo; Ko, In Soo; Cho, Moohyun

    2015-05-01

    Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL) is a research facility currently under construction. It will provide ultra-bright (assuming 1 X 1012 photons/pulse at 12.4 keV) and ultra-short (10-60 femtosecond) X-ray pulses. The CXI (Coherent X-ray Imaging) end-station, which will be constructed for hard X-ray beamline at the PAL-XFEL, is designed to deliver brilliant hard x-rays (2-20 keV) and to measure diffraction signals with forward scattering geometry, mainly. Not only will it offer imaging studies of biological, chemical and physical samples by the "diffract-before-destroy" technique, but will also be helpful in high field hard x-ray physics and material science. The scientific programs are currently aimed at serial femtosecond crystallography (SFX) for macromolecular systems and coherent diffraction imaging for bio specimens and nano structures etc. In this paper, we describe the details of the beamline layout, X-ray focusing optics (Kirkpatrick-Baez mirror and Beryllium CRLs) and sample delivery system (liquid jet/LCP sample injector, fixed target system) that will be installed at the CXI beamline.

  15. Pulsed beam tests at the SANAEM RFQ beamline

    NASA Astrophysics Data System (ADS)

    Turemen, G.; Akgun, Y.; Alacakir, A.; Kilic, I.; Yasatekin, B.; Ergenlik, E.; Ogur, S.; Sunar, E.; Yildiz, V.; Ahiska, F.; Cicek, E.; Unel, G.

    2017-07-01

    A proton beamline consisting of an inductively coupled plasma (ICP) source, two solenoid magnets, two steerer magnets and a radio frequency quadrupole (RFQ) is developed at the Turkish Atomic Energy Authority’s (TAEA) Saraykoy Nuclear Research and Training Center (SNRTC-SANAEM) in Ankara. In Q4 of 2016, the RFQ was installed in the beamline. The high power tests of the RF power supply and the RF transmission line were done successfully. The high power RF conditioning of the RFQ was performed recently. The 13.56 MHz ICP source was tested in two different conditions, CW and pulsed. The characterization of the proton beam was done with ACCTs, Faraday cups and a pepper-pot emittance meter. Beam transverse emittance was measured in between the two solenoids of the LEBT. The measured beam is then reconstructed at the entrance of the RFQ by using computer simulations to determine the optimum solenoid currents for acceptance matching of the beam. This paper will introduce the pulsed beam test results at the SANAEM RFQ beamline. In addition, the high power RF conditioning of the RFQ will be discussed.

  16. Systematic and in situ energy dispersive X-ray diffraction investigations on the formation of lanthanide phosphonatobutanesulfonates: Ln(O(3)P-C(4)H(8)-SO(3))(H(2)O) (Ln = La-Gd).

    PubMed

    Feyand, Mark; Näther, Christian; Rothkirch, André; Stock, Norbert

    2010-12-06

    Using the flexible linker H(2)O(3)P-C(4)H(8)-SO(3)H (H(3)L) and rare earth ions Ln(3+) (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd) we were able to synthesize the new isostructural inorganic organic hybrid compounds Ln(O(3)P-C(4)H(8)-SO(3))(H(2)O). High-throughput experiments were employed to study the influence of the molar ratios Ln:H(3)L and pH on the product formation. The crystal structure of the compounds Sm(O(3)P-C(4)H(8)-SO(3))(H(2)O) (1) and Pr(O(3)P-C(4)H(8)-SO(3))(H(2)O) (2) were determined by single crystal diffraction. The structures are built up from chains of edge-sharing LnO(8)-polyhedra that are connected by the phosphonate and sulfonate groups into layers. These layers are linked by the -(CH(2))(4)- group to form a three-dimensional framework. The synthesis of compound 1 was scaled up in a conventional oven as well as in a microwave reactor system. A modification of a microwave reactor system allowed its integration into the beamline F3 at HASYLAB, DESY, Hamburg. The crystallization was investigated in situ by means of energy dispersive X-ray diffraction using conventional as well as microwave heating methods applying temperatures varying from 110 to 150 °C. The formation of Sm(O(3)P-C(4)H(8)-SO(3))(H(2)O) takes place in two steps. In the first step a crystalline intermediate was observed, which transforms completely into compound 1. The method by Sharp and Hancock was used to determine the rate constants, reaction exponents, and the Arrhenius activation energy for both reaction steps. Comparing both heating methods, microwave heating leads to fully crystallized reaction product after shorter reaction times, but neither the temperature nor the heating method has significant influence on the induction time.

  17. Survey and documentation of emerging technologies for the satellite power system (SPS)

    SciTech Connect

    Glaser, P.; Chapman, P.

    1981-04-01

    The purpose of this study is to survey emerging technologies and new concepts which may offer advantages over those selected for the SPS Reference System. A brief historical overview of the genesis of the Solar Power Satellite (SPS) concept is presented leading to a discussion of the assumptions and guidelines which were originally established and which led to development of the SPS Reference System design concept. Some of these guidelines are applicable to almost any SPS design, but others could be changed, leading to new and perhaps preferable systems. Moreover, while some of the guidelines are based on solid data, some are little more than arbitrary assumptions which were adopted only to proceed with a concrete point design which then could be assessed in the DOE/NASA Concept Development and Evaluation Program. In order to stimulate new SPS concepts and to facilitate comparative assessment of emerging SPS technologies, one useful approach is to break the overall system into functional parts. The system functions which must be performed by any SPS concept and the interrelations between them are discussed and a systematic framework is presented for assessment of the wide variety of system concepts and subsystem technologies which have been proposed. About 80 alternative SPS technologies are reviewed.

  18. Sodium polyanethol sulfonate (SPS) falsifies protein staining and quantification and how to solve this problem.

    PubMed

    Prax, Marcel; Vatani Shahmirzadi, Shideh; Götz, Friedrich

    2015-11-01

    Sodium polyanethol sulfonate (SPS) is an anionic detergent with a broad range of activities and applications. While studying the excretion of cytoplasmic proteins in Staphylococcus aureus SPS was used as cell lysis inhibitor. When investigating the protein pattern of culture supernatants from cells grown in the absence or presence of SPS by Coomassie blue stained polyacrylamide gel the amount of protein bands was significantly decreased in the presence of SPS, suggesting that this effect was due to inhibition of cell lysis. However, various control studies showed that the apparent decreased protein secretion was an artifact due to the interference of SPS with Coomassie blue- and silver-staining. The only alternative method that was uninfluenced by SPS was imidazole-SDS-zinc staining. This is the method of choice particularly when protein interfering compounds are present in the extracts. For protein quantification in liquid samples the bicinchoninic acid (BCA) assay appeared to be the method of choice in the presence of SPS. The assay is based on neutral peptide bonds and is therefore rather insensitive to interfering compounds. This study shows that SPS and most likely also related detergents might falsify conventional protein staining and quantification methods. Copyright © 2015 Elsevier B.V. All rights reserved.

  19. Preliminary assessment of the Satellite Power System (SPS) and six other energy technologies

    SciTech Connect

    Wolsko, T.; Brown, C.; Cirillo, R.

    1980-04-01

    The comparative assessment portion of the Satellite Power System (SPS) Concept Development and Evaluation program established by the Department of Energy and the National Aeronautics and Space Administration to generate information from which a rational decision could be made regarding the viability of the SPS is presented. The objective of the comparative assessment is to develop an initial understanding of the SPS with respect to a limited set of energy alternatives. Six alternative technologies (conventional coal combustion; light water reactor; coal gasification/combined cycle; liquid-metal, fast-breeder reactor; terrestrial photovoltaic; and fusion) were compared to the SPS on the basis of available data on cost and performance, health and safety, environmental welfare, resource requirements, and economics. These comparisons are descriptive and do not culminate in any bottom line regarding the overall viability of the SPS.

  20. Conditions and requirements for a potential application of solar power satellites /SPS/ for Europe

    NASA Astrophysics Data System (ADS)

    Westphal, W.; Ruth, J.; Kassing, D.

    1980-12-01

    The potential problems of a future introduction of Solar Power Satellites (SPS) as baseload power plants for Western European countries are considered, emphasizing the differences of SPS utilization in Europe compared with that in the USA as a result of geographical, orbital organizational, and industrial conditions. If estimated SPS safety zone areas are required, then the SPS system incorporating the 2.45 GHz microwave power transmission appears crucial for utilization in Western Europe in order to eliminate the large rectenna area requirements of an SPS 5 GW power system. A frequency variation of up to 5 or 10 GHz, and the application of either laser power transmission or solid state devices which could alleviate rectenna siting problems and restrictions on the use of the geosynchronous orbit are discussed.

  1. Analysis of the transverse SPS beam coupling impedance with short and long bunches

    SciTech Connect

    Salvant,B.; Calaga, R.; de Maria, R.; Arduini, G.; Burkhardt, H.; Damerau, H.; Hofle, W.; Metral, E.; Papotti, G.; Rumolo, G.; Tomas, R.; White, S.

    2009-05-04

    The upgrade of the CERN Large Hadron Collider (LHC) would require a four- to five-fold increase of the single bunch intensity presently obtained in the Super Proton Synchrotron (SPS). Operating at such high single bunch intensities requires a detailed knowledge of the sources of SPS beam coupling impedance, so that longitudinal and transverse impedance reduction campaigns can be planned and performed effectively if needed. In this paper, the transverse impedance of the SPS is studied by injecting a single long bunch into the SPS, and observing its decay without RF. Longer bunches allow for higher frequency resolution of the longitudinal and transverse bunch spectra acquired with strip line couplers connected to a fast data acquisition. It also gives access to the frequency content of the transverse impedance. Results from measurements with short and long bunches in the SPS performed in 2008 are compared with simulations.

  2. MARS, a new beamline for radioactive matter studies at SOLEIL

    NASA Astrophysics Data System (ADS)

    Solari, Pier Lorenzo; Schlutig, Sandrine; Hermange, Hervé; Sitaud, Bruno

    2009-11-01

    MARS (Multi Analyses on Radioactive Samples) beamline is the hard X-ray bending magnet beamline dedicated to the study of radioactive matter of the new French synchrotron SOLEIL. The beamline, which has been built thanks to a close partnership and support by the CEA, has been designed to provide X-rays in the energy range of 3.5 keV to 35 keV. This allows to encompass M and L absorption edges of actinides, as well as K edges of transition metals (that are present in alloys and fuel claddings) up to heavy halogens, rare gases and alkalis (fission products in nuclear fuels). The MARS project aims to extend the possibilities of synchrotron based X-ray characterizations towards a wider variety of radioactive elements and a wider variety of techniques than what is currently available at other facilities. Thus, its specific and innovative infrastructure has been optimized in order to carry out analyses on materials with activities up to 18.5 GBq per sample for α and β emitters and 2 GBq for γ and n emitters. So, today, more than 70 different elements and more than 350 different isotopes have been proposed for studies on the beamline by the involved user community. The arrangement of the different elements in the optics hutch is based on an original scheme which permits to have two alternative optical configurations (monochromatic or dispersive) depending on the nature of experiments to be performed. At least three main techniques are progressively being proposed on the three complementary end-stations located in the experimental hutch: transmission and high resolution powder diffraction (TXRD and HRXRD), standard and dispersive X-ray absorption spectroscopy (XAS and EDXAS) and X-ray fluorescence (XRF). In addition, by using the KB optics, a micro-focused beam will be available on the second station of the monochromatic branch. The beamline is currently under commissioning. The first two experimental stations, using the monochromatic branch, are scheduled to be

  3. Antibodies to meningococcal H.8 (Lip) antigen fail to show bactericidal activity.

    PubMed

    Bhattacharjee, A K; Moran, E E; Zollinger, W D

    1990-02-01

    Purified H.8 (Lip) antigen was coupled to tresyl-activated Sepharose 4B and used in affinity columns to purify anti-Lip antibodies from convalescent patient sera and from immune rabbit sera. Affinity-purified anti-Lip antibodies isolated from two convalescent patient sera contained 1000 and 1280 ELISA units of antibody and included antibodies of IgG, IgA, and IgM isotypes. An anti-Lip mouse monoclonal ascites (2-1-CA2) had 28,400 ELISA units of antibody. Bactericidal assays were performed using three different case strains of Neisseria meningitidis group B, namely 44/76, 8532, and 8047. Neither preparation of purified human anti-Lip antibodies had detectable bactericidal activity against strains 44/76 and 8532, but one of the two had a titer of 1:4 against strain 8047. Anti-Lip antibodies that were purified from immune rabbit serum and contained 1600 ELISA units of anti-Lip antibodies also failed to show detectable bactericidal activity. The rabbits were immunized with purified Lip antigen and showed specific antibody levels of 2000-2200 units by ELISA, but even the unfractionated sera had little or no bactericidal activity against the test strains. The high titer mouse monoclonal ascites had no bactericidal activity against the test strains. The poor bactericidal activity associated with monoclonal and polyclonal antibodies to the Lip antigen suggest that in spite of other attractive properties it may not be useful as a meningococcal vaccine.

  4. Photobinding of /sup 3/H 8-methoxypsoralen to monkey intraocular tissues

    SciTech Connect

    Lerman, S.; Megaw, J.; Gardner, K.; Takei, Y.; Franks, Y.; Gammon, A.

    1984-11-01

    Young (less than 1 year) and old (greater than 15 years) Rhesus monkeys were utilized in this study in order to determine whether ultraviolet (UV) radiation at ambient levels induces psoralen photobinding in primate eyes (in particular the lens and retina). Unilateral aphakia or pseudophakia was induced surgically and the eyes were allowed to heal. The animals then were given a single intraperitoneal injection of /sup 3/H 8-methoxypsoralen (8-MOP) and immediately exposed to BLB lights (of measured radiation intensity at the corneal surface). The animals were killed at varying time periods (2-6 weeks), and the eyes were removed immediately. One-half of each cornea and lens was frozen for subsequent optical spectroscopy and the remaining ocular tissues were fixed for histopathologic studies and autoradiography. These data demonstrate that low level UV radiation (less than 0.4 mW/cm2) can cause 8-MOP photobinding to lens proteins and DNA and to aphakic, pseudophakic, and young phakic primate retinas. The older phakic primate lens serves as a protective UV filter and prevents psoralen photobinding within the retina. These data suggest that older aphakes and pseudophakes may require UV radiation protection to prevent direct as well as photosensitized retinal photodamage.

  5. Electronic structure and electrochemical properties of the h4-h8 bis (cyclooctatetraene) vanadium

    NASA Astrophysics Data System (ADS)

    Hebant, P.; Legendre, J. J.; Gourier, D.; Samuel, E.

    1995-04-01

    The h4-h8 bis (cyclooctatetraene) vanadium is a ``sandwich'' complex with 17 électrons on the external shell of the metallic atom. It presents two types of carbon-vanadium bonding. One cycle is bonded to the metal by eight carbon atoms, the other one by four carbon atoms only. EPR and ENDOR measurements have shown that this complex exhibits a strong fluxionality in frozen solution down to 30°K. Moreover, cyclic voltametry experiments reveals two oxydation waves. This fact is suprising since the number of electrons in the external shell of such oxydized complexes move away from 18. A study of the geometries and the electronic structures of these complexes has been undertaken using a local density functional technique. These results have been checked by comparison with data obtained from X-ray diffraction and ENDOR spectra: the optimized geometries are very close to what is found in the solid state and the existence of two types of V-carbon bonds is confirmed. Moreover the spin densities calculated for hydrogen atoms by LDF fairly coincide with ENDOR data. The LDF study of V(cot)+2 and V(cot)++2 cations allowed an interpretation of the existence of the two oxydation waves: a structural and electronic modification of the complex occurs that maintains close to 18 the number of electrons in the vanadium external shell.

  6. NanoMAX: a hard x-ray nanoprobe beamline at MAX IV

    NASA Astrophysics Data System (ADS)

    Johansson, Ulf; Vogt, Ulrich; Mikkelsen, Anders

    2013-09-01

    We describe the design of the NanoMAX beamline to be built among the first phase beamlines of the MAX IV facility in Lund, Sweden. NanoMAX will be a hard X-ray imaging beamline providing down to 10 nm in direct spatial resolution, enabling investigations of very small heterogeneous samples exploring methods of diffraction, scattering, absorption, phase contrast and fluorescence. The beamline will have two experimental stations using Fresnel zone plates and Kirkpatrick-Baez mirror optics for beam focusing, respectively. This paper focuses on the optical design of the beamline excluding the experimental stations but also describes general ideas about the endstations and the nano-focusing optics to be used. The NanoMAX beamline is planned to be operational late 2016.

  7. Are HO radicals produced in the reaction of O(3P) with 1-C4H8 ?

    NASA Technical Reports Server (NTRS)

    Luria, M.; Simonaitis, R.; Heicklen, J.

    1972-01-01

    The reaction of O(3P) with 1-C4H8 was examined in the presence of CO which scavenges HO radicals to produce CO2. From the CO2 quantum yield, an upper limit to the efficiency of HO production in the reaction of O(3P) with 1-C4H8 was found to be 0.020 at both 298 and 473 K.

  8. Gas bremsstrahlung shielding calculation for first optic enclosure of ILSF medical beamline

    NASA Astrophysics Data System (ADS)

    Beigzadeh Jalali, H.; Salimi, E.; Rahighi, J.

    2016-10-01

    Gas bremsstrahlung is generated in high energy electron storage ring accompanies the synchrotron radiation into the beamlines and strike the various components of the beamline. In this paper, radiation shielding calculation for secondary gas bremsstrahlung is performed for the first optics enclosure (FOE) of medical beamline of the Iranian Light Source Facility (ILSF). Dose equivalent rate (DER) calculation is accomplished using FLUKA Monte Carlo code. A comprehensive study of DER distribution at the back wall, sides and roof is given.

  9. Advanced light source vacuum policy and vacuum guidelines for beamlines and experiment endstations

    SciTech Connect

    Hussain, Z.

    1995-08-01

    The purpose of this document is to: (1) Explain the ALS vacuum policy and specifications for beamlines and experiment endstations. (2) Provide guidelines related to ALS vacuum policy to assist in designing beamlines which are in accordance with ALS vacuum policy. This document supersedes LSBL-116. The Advanced Light Source is a third generation synchrotron radiation source whose beam lifetime depends on the quality of the vacuum in the storage ring and the connecting beamlines. The storage ring and most of the beamlines share a common vacuum and are operated under ultra-high-vacuum (UHV) conditions. All endstations and beamline equipment must be operated so as to avoid contamination of beamline components, and must include proper safeguards to protect the storage ring vacuum from an accidental break in the beamline or endstation vacuum systems. The primary gas load during operation is due to thermal desorption and electron/photon induced desorption of contaminants from the interior of the vacuum vessel and its components. The desorption rates are considerably higher for hydrocarbon contamination, thus considerable emphasis is placed on eliminating these sources of contaminants. All vacuum components in a beamline and endstation must meet the ALS vacuum specifications. The vacuum design of both beamlines and endstations must be approved by the ALS Beamline Review Committee (BRC) before vacuum connections to the storage ring are made. The vacuum design is first checked during the Beamline Design Review (BDR) held before construction of the beamline equipment begins. Any deviation from the ALS vacuum specifications must be approved by the BRC prior to installation of the equipment on the ALS floor. Any modification that is incorporated into a vacuum assembly without the written approval of the BRC is done at the user`s risk and may lead to rejection of the whole assembly.

  10. Satellite Power Systems (SPS) space transportation cost analysis and evaluation

    SciTech Connect

    1980-11-01

    The objective of this study is to provide a clear picture of SPS space transportation costs at the present time with respect to their accuracy as stated, the reasonableness of the methods used, the assumptions made, and the uncertainty associated with the estimates. The approach used consists of examining space transportation costs from several perspectives - to perform a variety of sensitivity analyses or reviews and examine the findings in terms of internal consistency and external comparison with analogous systems. These approaches are summarized as a theoretical and historical review including a review of stated and unstated assumptions used to derive the costs, and a performance or technical review. These reviews cover the overall transportation program as well as the individual vehicles proposed. The review of overall cost assumptions is the principal means used for estimating the cost uncertainty derived. The cost estimates used as the best current estimate are included.

  11. Cost and performance projections for SPS photovoltaic blankets

    NASA Technical Reports Server (NTRS)

    Scott-Monck, J. A.

    1981-01-01

    An estimate, based on optimistic projections of current technology, is given for the specific power of photovoltaic blankets which might be achieved if the SPS concept was to be implemented. A simultaneous consideration of cost and technical requirements is used to identify key blanket technologies which must be developed for this reference system. The terrestrial photovoltaic experience coupled with new technology is used to develop cost estimates for the blanket, assuming an annual demand of 5 GW and a manufacturing industry dedicated to blanket production. The results indicate that blanket specific power goals may be exceeded, but there is little prospect that the cost goals can be met. This argues for a reconsideration of the photovoltaic option based on more expensive but higher performance blankets.

  12. 10 years of protein crystallography at AR-NW12A beamline

    NASA Astrophysics Data System (ADS)

    Chavas, L. M. G.; Yamada, Y.; Hiraki, M.; Igarashi, N.; Matsugaki, N.; Wakatsuki, S.

    2013-03-01

    The exponential growth of protein crystallography can be observed in the continuously increasing demand for synchrotron beam time, both from academic and industrial users. Nowadays, the screening of a profusion of sample crystals for more and more projects is being implemented by taking advantage of fully automated procedures at every level of the experiments. The insertion device AR-NW12A beamline is one of the five macromolecular crystallography (MX) beamlines at the Photon Factory (PF). Currently the oldest MX beamline operational at the High Energy Accelerator Research Organization (KEK), the end-station was launched in 2001 as part of an upgrade of the PF Advanced Ring. Since its commissioning, AR-NW12A has been operating as a high-throughput beamline, slowly evolving to a multipurpose end-station for MX experiments. The development of the beamline took place about a decade ago, in parallel with a drastic development of protein crystallography and more general synchrotron technology. To keep the beamline up-to-date and competitive with other MX stations in Japan and worldwide, new features have been constantly added, with the goal of user friendliness of the various beamline optics and other instruments. Here we describe the evolution of AR-NW12A for its tenth anniversary. We also discuss the plans for upgrades for AR-NW12A, the future objectives in terms of the beamline developments, and especially the strong desire to open the beamline to a larger user community.

  13. HERMES: a soft X-ray beamline dedicated to X-ray microscopy.

    PubMed

    Belkhou, Rachid; Stanescu, Stefan; Swaraj, Sufal; Besson, Adrien; Ledoux, Milena; Hajlaoui, Mahdi; Dalle, Didier

    2015-07-01

    The HERMES beamline (High Efficiency and Resolution beamline dedicated to X-ray Microscopy and Electron Spectroscopy), built at Synchrotron SOLEIL (Saint-Auban, France), is dedicated to soft X-ray microscopy. The beamline combines two complementary microscopy methods: XPEEM (X-ray Photo Emitted Electron Microscopy) and STXM (Scanning Transmission X-ray Microscopy) with an aim to reach spatial resolution below 20 nm and to fully exploit the local spectroscopic capabilities of the two microscopes. The availability of the two methods within the same beamline enables the users to select the appropriate approach to study their specific case in terms of sample environment, spectroscopy methods, probing depth etc. In this paper a general description of the beamline and its design are presented. The performance and specifications of the beamline will be reviewed in detail. Moreover, the article is aiming to demonstrate how the beamline performances have been specifically optimized to fulfill the specific requirements of a soft X-ray microscopy beamline in terms of flux, resolution, beam size etc. Special attention has been dedicated to overcome some limiting and hindering problems that are usually encountered on soft X-ray beamlines such as carbon contamination, thermal stability and spectral purity.

  14. Performance of the HERMES beamline at the carbon K-edge

    NASA Astrophysics Data System (ADS)

    Swaraj, S.; Belkhou, R.; Stanescu, S.; Rioult, M.; Besson, A.; Hitchcock, A. P.

    2017-06-01

    Contamination of soft X-rays beamline optics due to carbon cracking and deposition under X- ray irradiation is especially critical for spectromicroscopy operations near the carbon K-absorption edge from organic materials, polymers and nanoparticles. In this paper we present the strategy and procedure followed on the HERMES beamline (Synchrotron SOLEIL) to minimize carbon contamination of the beamline optics. Measurements on a complex organic test sample are reported to demonstrate the performance of the beamline at the carbon K-edge in imaging, spectroscopy and spectromicroscopy modes.

  15. BL2D-SMC, the supramolecular crystallography beamline at the Pohang Light Source II, Korea.

    PubMed

    Shin, Jong Won; Eom, Kisu; Moon, Dohyun

    2016-01-01

    BL2D-SMC at the Pohang Light Source II is a supramolecular crystallography beamline based on a bending magnet. The beamline delivers high-flux tunable X-rays with energies from 8.3 to 20.7 keV and a 100 µm (horizontal) × 85 µm (vertical) full width at half-maximum focal spot. Experiments involving variable temperature, photo-excitation and gas sorption are supported by ancillary equipment and software in the beamline. The design of the beamline, its role and the main components are described.

  16. Construction of Bending Magnet Beamline at the APS for Environmental Studies

    SciTech Connect

    E. A. Stern

    1999-09-14

    The objective of this research was to design and construct a bending magnet beamline at the Advanced Photon Source. The beamline is to be optimized for x-ray absorption spectroscopy (XAS) studies with a major focus on environmental issues. The beamline will share the experimental facilities under development at the neighboring undulator-based insertion device beamline. It will utilize these facilities for XAS of both bulk and surface samples, with spatial and elemental imaging, on toxic and radioactive samples. It will help meet the rapidly growing need for the application of these techniques to environmental problems.

  17. Analysis of several high-resolution infrared bands of spiropentane, C5H8

    SciTech Connect

    Maki, Arthur G.; Price, Joseph E.; Harzan, J.; Nibler, Joseph W.; Weber, Alfons; Masiello, Tony; Blake, Thomas A.

    2015-06-01

    he high-resolution infrared absorption spectrum of spiropentane (C5H8) has been measured from 200 to 4000 cm 1, and a detailed analysis is presented for eight bands in the region from 700 to 2200 cm 1. Two fundamental perpendicular bands were analyzed, m22 and m24 near 1050 and 780 cm 1, respectively, along with two fundamental parallel bands, m14 and m16 near 1540 and 990 cm1, respectively. Two other fundamentals, m17 and m23, are seen as intense overlapping bands near 880 cm*1 and are Coriolis-coupled, producing a complex mixture in which only P-branch transitions could be tentatively assigned for m17. In addition, three binary combination bands were fit at about 1570, 2082, and 2098 cm*1 which are assigned as either 2m24 or m5 + m16 in the first case, m4 + m22 in the second case, and 2m22 in the latter case. The two l-type resonance constants, q+ and q*, were determined for each of the two perpendicular fundamentals m22 and m24. Those two constants were also responsible for splittings observed in the K = 3 levels of m24. For the ground state the order of the split K = 2 B1/B2 levels has been reversed from that reported previously, based on the measurements and assignments for the m24 band. Rovibrational parameters deduced from the analyses are compared with those obtained from density functional Gaussian calculations at the anharmonic level.

  18. Biodegradation test of SPS-LS blends as polymer electrolyte membrane fuel cells

    SciTech Connect

    Putri, Zufira E-mail: arcana@chem.itb.ac.id; Arcana, I Made E-mail: arcana@chem.itb.ac.id

    2014-03-24

    Sulfonated polystyrene (SPS) can be applied as a proton exchange membrane fuel cell due to its fairly good chemical stability. In order to be applied as polymer electrolyte membrane fuel cells (PEMFCs), membrane polymer should have a good ionic conductivity, high proton conductivity, and high mechanical strength. Lignosulfonate (LS) is a complex biopolymer which has crosslinks and sulfonate groups. SPS-LS blends with addition of SiO{sub 2} are used to increase the proton conductivity and to improve the mechanical properties and thermal stability. However, the biodegradation test of SPS-LS blends is required to determine whether the application of these membranes to be applied as an environmentally friendly membrane. In this study, had been done the synthesis of SPS, biodegradability test of SPS-LS blends with variations of LS and SiO{sub 2} compositions. The biodegradation test was carried out in solid medium of Luria Bertani (LB) with an activated sludge used as a source of microorganism at incubation temperature of 37°C. Based on the results obtained indicated that SPS-LS-SiO{sub 2} blends are more decomposed by microorganism than SPS-LS blends. This result is supported by analysis of weight reduction percentage, functional groups with Fourier Transform Infrared (FTIR) Spectroscopy, and morphological surface with Scanning Electron Microscopy (SEM)

  19. Biodegradation test of SPS-LS blends as polymer electrolyte membrane fuel cells

    NASA Astrophysics Data System (ADS)

    Putri, Zufira; Arcana, I. Made

    2014-03-01

    Sulfonated polystyrene (SPS) can be applied as a proton exchange membrane fuel cell due to its fairly good chemical stability. In order to be applied as polymer electrolyte membrane fuel cells (PEMFCs), membrane polymer should have a good ionic conductivity, high proton conductivity, and high mechanical strength. Lignosulfonate (LS) is a complex biopolymer which has crosslinks and sulfonate groups. SPS-LS blends with addition of SiO2 are used to increase the proton conductivity and to improve the mechanical properties and thermal stability. However, the biodegradation test of SPS-LS blends is required to determine whether the application of these membranes to be applied as an environmentally friendly membrane. In this study, had been done the synthesis of SPS, biodegradability test of SPS-LS blends with variations of LS and SiO2 compositions. The biodegradation test was carried out in solid medium of Luria Bertani (LB) with an activated sludge used as a source of microorganism at incubation temperature of 37°C. Based on the results obtained indicated that SPS-LS-SiO2 blends are more decomposed by microorganism than SPS-LS blends. This result is supported by analysis of weight reduction percentage, functional groups with Fourier Transform Infrared (FTIR) Spectroscopy, and morphological surface with Scanning Electron Microscopy (SEM).

  20. Toyota beamline (BL33XU) at SPring-8

    SciTech Connect

    Nonaka, T. Dohmae, K.; Hayashi, Y.; Yamaguchi, S.; Nagai, Y.; Hirose, Y.; Araki, T.; Tanaka, T.; Kitamura, H.; Uruga, T.; Yamazaki, H.; Yumoto, H.; Ohashi, H.; Goto, S.

    2016-07-27

    The Toyota beamline (BL33XU) at SPring-8 is an undulator beamline developed to assist in the study of various automotive-related materials. The light source is a tapered in-vacuum undulator that provides a variable energy band width as well as a high brilliance X-ray beam. Two different optical arrangements are available: Optics 1 and Optics 2. Optics 1 is dedicated to time-resolved X-ray absorption spectroscopy (XAFS), and consists of two channel-cut crystal monochromators and four water-cooled flat Si mirrors. The Si(111) and Si(220) monochromator crystals cover an energy range of 4.0–46.0 keV and are driven by high-speed AC servo motors. These monochromators, in conjunction with the tapered undulator, enable high-quality XAFS data acquisition with a temporal resolution of 10 ms. Optics 2 is optimized for X-ray diffraction, scattering and imaging and includes a recently installed double crystal monochromator, two water-cooled flat Si mirrors and Kirkpatrick-Baez (KB) focusing mirrors. The monochromator incorporates parallel mounted Si(111) and Si(311) crystals and covers an energy range of 4.5–70 keV. The beamline provides two experimental stations: Exp. Hutch 2 and Exp. Hutch 3. The gas supply system and mass spectrometers installed in Exp. Hutch 2 allow in-operando measurements under various atmospheres. The scanning three-dimensional X-ray diffraction (scanning 3DXRD) microscopy instrumentation developed and installed in Exp. Hutch 3 enables non-destructive orientation and stress mapping of 1 mm-thick steel specimens using a high energy microbeam.

  1. The BALDER Beamline at the MAX IV Laboratory

    NASA Astrophysics Data System (ADS)

    Klementiev, K.; Norén, K.; Carlson, S.; Sigfridsson Clauss, K. G. V.; Persson, I.

    2016-05-01

    X-ray absorption spectroscopy (XAS) includes well-established methods to study the local structure around the absorbing element - extended X-ray absorption fine structure (EXAFS), and the effective oxidation number or to quantitatively determine the speciation of an element in a complex matrix - X-ray absorption near-edge structure (XANES). The increased brilliance and intensities available at the new generation of synchrotron light sources makes it possible to study, in-situ and in-operando, much more dilute systems with relevance for natural systems, as well as the micro-scale variability and dynamics of chemical reactions on the millisecond time-scale. The design of the BALDER beamline at the MAX IV Laboratory 3 GeV ring has focused on a high flux of photons in a wide energy range, 2.4-40 keV, where the K-edge is covered for the elements S to La, and the L 3-edge for all elements heavier than Sb. The overall design of the beamline will allow large flexibility in energy range, beam size and data collection time. The other focus of the beamline design is the possibility to perform multi-technique analyses on samples. Development of sample environment requires focus on implementation of auxiliary methods in such a way that techniques like Fourier transform infrared (FTIR) spectroscopy, UV-Raman spectroscopy, X-ray diffraction and/or mass spectrometry can be performed simultaneously as the XAS study. It will be a flexible system where different instruments can be plugged in and out depending on the needs for the particular investigation. Many research areas will benefit from the properties of the wiggler based light source and the capabilities to perform in-situ and in-operando measurements, for example environmental and geochemical sciences, nuclear chemistry, catalysis, materials sciences, and cultural heritage.

  2. Resonant scattering and diffraction beamline P09 at PETRA III.

    PubMed

    Strempfer, J; Francoual, S; Reuther, D; Shukla, D K; Skaugen, A; Schulte-Schrepping, H; Kracht, T; Franz, H

    2013-07-01

    The resonant scattering and diffraction beamline P09 at PETRA III is designed for X-ray experiments requiring small beams, energy tunability, variable polarization and high photon flux. It is highly flexible in terms of beam size and offers full higher harmonic suppression. A state-of-the-art double phase-retarder set-up provides variable linear or circular polarization. A high-precision Psi-diffractometer and a heavy-load diffractometer in horizontal Psi-geometry allow the accommodation of a wide variety of sample environments. A 14 T cryo-magnet is available for scattering experiments in magnetic fields.

  3. Time-resolved neutron imaging at ANTARES cold neutron beamline

    NASA Astrophysics Data System (ADS)

    Tremsin, A. S.; Dangendorf, V.; Tittelmeier, K.; Schillinger, B.; Schulz, M.; Lerche, M.; Feller, W. B.

    2015-07-01

    In non-destructive evaluation with X-rays light elements embedded in dense, heavy (or high-Z) matrices show little contrast and their structural details can hardly be revealed. Neutron radiography, on the other hand, provides a solution for those cases, in particular for hydrogenous materials, owing to the large neutron scattering cross section of hydrogen and uncorrelated dependency of neutron cross section on the atomic number. The majority of neutron imaging experiments at the present time is conducted with static objects mainly due to the limited flux intensity of neutron beamline facilities and sometimes due to the limitations of the detectors. However, some applications require the studies of dynamic phenomena and can now be conducted at several high intensity beamlines such as the recently rebuilt ANTARES beam line at the FRM-II reactor. In this paper we demonstrate the capabilities of time resolved imaging for repetitive processes, where different phases of the process can be imaged simultaneously and integrated over multiple cycles. A fast MCP/Timepix neutron counting detector was used to image the water distribution within a model steam engine operating at 10 Hz frequency. Within <10 minutes integration the amount of water was measured as a function of cycle time with a sub-mm spatial resolution, thereby demonstrating the capabilities of time-resolved neutron radiography for the future applications. The neutron spectrum of the ANTARES beamline as well as transmission spectra of a Fe sample were also measured with the Time Of Flight (TOF) technique in combination with a high resolution beam chopper. The energy resolution of our setup was found to be ~ 0.8% at 5 meV and ~ 1.7% at 25 meV. The background level (most likely gammas and epithermal/fast neutrons) of the ANTARES beamline was also measured in our experiments and found to be on the scale of 3% when no filters are installed in the beam. Online supplementary data available from stacks.iop.org/jinst/10

  4. ROCK: the new Quick-EXAFS beamline at SOLEIL

    NASA Astrophysics Data System (ADS)

    Briois, V.; La Fontaine, C.; Belin, S.; Barthe, L.; Moreno, Th; Pinty, V.; Carcy, A.; Girardot, R.; Fonda, E.

    2016-05-01

    ROCK is a new beamline at SOLEIL dedicated to Quick-EXAFS measurements. The optical layout has been optimized to get full advantage of the monochromators, which were designed at SOLEIL and successfully used at SAMBA from 2009 to 2014. ROCK has started user operations since March 2015. It is mainly employed to monitor fast kinetic processes in materials used in catalysis and energy sciences. A review of the ROCK performances and capabilities is presented. The high automation achieved for fast change of monochromators, optimization of mirrors for harmonic rejection and detectors allows the simultaneous operando characterization of different chemical elements present in a material during the same reaction.

  5. Advanced beamline design for Fermilab's Advanced Superconducting Test Accelerator

    NASA Astrophysics Data System (ADS)

    Prokop, Christopher R.

    The Advanced Superconducting Test Accelerator (ASTA) at Fermilab is a new electron accelerator currently in the commissioning stage. In addition to testing superconducting accelerating cavities for future accelerators, it is foreseen to support a variety of Advanced Accelerator R&D (AARD) experiments. Producing the required electron bunches with the expected flexibility is challenging. The goal of this dissertation is to explore via numerical simulations new accelerator beamlines that can enable the advanced manipulation of electron bunches. The work especially includes the design of a low-energy bunch compressor and a study of transverse-to-longitudinal phase space exchangers.

  6. NSLS-II beamline scattered gas bremsstrahlung radiation shielding calculation

    SciTech Connect

    Popescu, Razvan; Xia, Zhenghua Job, Panakkal; Lee, Wah-Keat

    2016-07-27

    National Synchrotron Light Source II (NSLS-II) is a new state-of-the-art 3rd generation synchrotron. The NSLS-II facility is shielded up to 3 GeV electron beam energy at 500 mA. When the gas bremsstrahlung (GB) from the storage ring is scattered by the beamline components in the first optical enclosure (FOE), the scattered radiation will pose additional radiation hazard (bypassing primary GB collimators and stops) and challenge the FOE shielding. The scattered GB radiation hazard can be mitigated by supplementary shielding or with an exclusion zone downstream of the FOE.

  7. Implementation of the beamline controls at the Florence accelerator laboratory

    NASA Astrophysics Data System (ADS)

    Carraresi, L.; Mirto, F. A.

    2008-05-01

    The new Tandetron accelerator in Florence, with many different beamlines, has required a new organization of all the control signals of the used equipment (slow control). We present our solution, which allows us the control of all the employed instruments simultaneously from a number of different workplaces. All of our equipment has been designed to be Ethernet based and this is the key to accomplish two very important requirements: simultaneous remote control from many computers and electrical isolation to achieve a lower noise level. The control of the instruments requires only one Ethernet network and no particular interfaces or drivers on the computers.

  8. GIXRD measurements at EDXRD beamline at INDUS-2 synchrotron

    SciTech Connect

    Pandey, K. K.; Kumar, Dileep; Dwivedi, Abhilash; Gupta, Ajay; Sharma, Surinder M.

    2012-06-05

    The energy dispersive x-ray diffraction (EDXRD) beam line at beam port no. BL-11, INDUS-2, RRCAT (Indore) has been adapted for grazing incidence x-ray diffraction (GIXRD) measurements in both out-of plane and in-plane geometry. With the help of energy sensitive high resolution HPGe detector, we have been able to record diffraction data from thin films of thicknesses ranging from few nanometers to hundreds of nanometers. We are presenting here a few demonstrative examples to illustrate the capabilities and possible implications of EDXRD beamline in carrying out structural investigations of thin films.

  9. Advanced Beamline Design for Fermilab's Advanced Superconducting Test Accelerator

    SciTech Connect

    Prokop, Christopher

    2014-01-01

    The Advanced Superconducting Test Accelerator (ASTA) at Fermilab is a new electron accelerator currently in the commissioning stage. In addition to testing superconducting accelerating cavities for future accelerators, it is foreseen to support a variety of Advanced Accelerator R&D (AARD) experiments. Producing the required electron bunches with the expected flexibility is challenging. The goal of this dissertation is to explore via numerical simulations new accelerator beamlines that can enable the advanced manipulation of electron bunches. The work especially includes the design of a low-energy bunch compressor and a study of transverse-to-longitudinal phase space exchangers.

  10. Purification and characterization of natural Ara h 8, the Bet v 1 homologous allergen from peanut, provides a novel isoform.

    PubMed

    Riecken, Susanne; Lindner, Buko; Petersen, Arnd; Jappe, Uta; Becker, Wolf-Meinhard

    2008-04-01

    The peanut allergen Ara h 8 is an important allergen for birch pollen allergic patients because of the cross-reactivity to the homologous Bet v 1. As the existence of Ara h 8 has been shown at the cDNA level so far (AY328088) and the allergen has indirectly been detected as natural protein, it was the aim of our study to identify natural Ara h 8 in peanut extract and to develop a purification strategy. This was achieved using a unique combination of purification steps, including optimized extraction conditions, size exclusion and ion exchange chromatography and treatment of the interfering contaminants with iodoacetic acid. A characterization of the protein by microsequencing showed discrepancies to the deduced amino acid sequence of AY328088. For this reason, we cloned and expressed a new Ara h 8 isoform from cDNA (EU046325). This IgE-reactive protein corresponds to the results of microsequencing, ESI-FTICR-MS and trypsin fingerprinting analysis of the authentic and purified nAra h 8. Apart from the ultimate use of recombinant allergens for diagnostic procedures, there is also a scientific need for the natural counterpart, as it represents an excellent reference point by which to compare protein characteristics and to standardize diagnostic and therapeutic allergens.

  11. High-resolution infrared spectra of spiropentane, C 5H 8

    NASA Astrophysics Data System (ADS)

    Price, J. E.; Coulterpark, K. A.; Masiello, T.; Nibler, J. W.; Weber, A.; Maki, A.; Blake, T. A.

    2011-09-01

    Infrared spectra of spiropentane (C 5H 8) have been recorded at a resolution (0.002 cm -1) sufficient to resolve for the first time individual rovibrational lines. This initial report presents the ground state rotational constants for this molecule determined from the detailed analysis of the ν16 ( b2) parallel band at 993 cm -1. In addition, the determination included more than 2000 ground state combination-differences deduced from partial analyses of four other infrared-allowed bands, the ν24( e) perpendicular band at 780 cm -1 and three ( b2) parallel bands at 1540 cm -1 ( ν14), 1568 cm -1 ( ν5 + ν16), and 2098 cm -1 ( ν5 + ν14). In each of the latter four cases, the spectra show complications; in the case of ν24, these complications are due to rotational l-type doublings, and in the case of the parallel bands, the spectral complexities are due to Fermi resonance and Coriolis interactions of the upper states with nearby levels. The unraveling of these is underway but the assignment of many of these transitions permit the confident use of the ground state differences in determining the following constants for the ground state (in units of cm -1): B0 = 0.1394741(1), D J = 2.461(1) × 10 -8, D JK = 8.69(3) × 10 -8. For the unperturbed ν16 fundamental, more than 3000 transitions were fit and the band origin was found to be at 992.53793(3) cm -1. The numbers in parentheses are the uncertainties (two standard deviations) in the value of the last digit of the constants. Surprisingly, the very accurate B0 value measured here is lower than the value (0.1418 cm -1) calculated from an electron diffraction structure, instead of being higher, as expected. Where possible, the rovibrational results are compared with those computed at the anharmonic level using the B3LYP density functional method with a cc-pVTZ basis set. These too suggest that the electron diffraction results are in question.

  12. LogAmp electronics and optical transmission for the new SPS beam position measurement system

    NASA Astrophysics Data System (ADS)

    Bogey, T.; Deplano, C.; Gonzalez, J. L.; Savioz, J. J.

    2013-12-01

    A new front-end board is under development for the CERN SPS Multi ORbit Position System (MOPOS). Based on logarithmic amplifiers, it measures the beam position over a large dynamic range of beam intensities and resolves the multi-batch structure of the SPS beams. Analogue data are digitized at 10 MS/s, packed in frames by an FPGA and on every turn sent to the readout board, via a 2.4 Gb/s optical transmission link. A first prototype has been successfully tested with several SPS beams. This paper presents an overall description of the system and its capabilities highlighted by the first beam measurements.

  13. Selection of alternative central-station technologies for the Satellite Power System (SPS) comparative assessment

    NASA Technical Reports Server (NTRS)

    Samsa, M.

    1980-01-01

    An important effort is the Satellite Power System (SPS) comparative Assessment is the selection and characterization of alternative technologies to be compared with the SPS concept. The ground rules, criteria, and screening procedure applied in the selection of those alternative technologies are summarized. The final set of central station alternatives selected for comparison with the SPS concept includes: (1) light water reactor with improved fuel utilization, (2) conventional coal combustion with improved environmental controls, (3) open cycle gas turbine with integral low Btu gasifier, (4) terrestrial photovoltaic, (5) liquid metal fast breeder reactor, and (6) magnetic confinement fusion.

  14. Satellite Power Systems (SPS) concept definition study, exhibit C. Volume 1: Executive summary

    NASA Technical Reports Server (NTRS)

    Hanley, G. M.

    1979-01-01

    The Department of Energy (DOE) is currently conducting an evaluation of approaches to provide energy to meet demands in the post-2000 time period. The Satellite Power System (SPS) is a candidate for producing significant quantities of base-load power using solar energy as the source. The SPS concept is illustrated for a solar photovoltaic concept. A satellite, located at geosynchronous orbit, converts solar energy to dc electrical energy using large solar arrays. This study is a continuing effort to provide system definition data to aid in the evaluation of the SPS concept.

  15. Satellite Power System (SPS): an Overview of Prospective Organizational Structures in the Solar Satellite Field

    NASA Technical Reports Server (NTRS)

    Edler, H. G.

    1978-01-01

    A literature survey, interviews with acknowledged experts in the fields of organizational entities, space, solar energy, and the SPS concept, and an analysis of these inputs to identify the organizational alternatives and make judgments as to their feasibility to serve as patterns for a future SPS entity are presented. Selection and evaluation criteria were determined to include timeliness, reliability, and adequacy to contribute meaningfully to the U.S. supply; political feasibility (both national and international) and cost-effectiveness (including environmental and other external costs). Based on these criteria, four organizational alternatives are discussed which offer reasonable promise as potential options for SPS. These included three domestic alternatives and one international alternative.

  16. Micro-Soft X-Ray Spectroscopy with the LUCIA Beamline

    SciTech Connect

    Lagarde, P.; Flank, A.-M.; Vantelon, D.; Janousch, M.

    2007-02-02

    With the development of new synchrotron radiation machines, which have seen, in the last ten years, the emittance of the beam decreased by several orders of magnitude, new beamlines have been developed which make full use of these improvements. We describe here the LUCIA beamline, which has been implemented at the Swiss Light Source in a collaboration between PSI, SOLEIL and the CNRS.

  17. The Low Density Matter (LDM) beamline at FERMI: optical layout and first commissioning.

    PubMed

    Svetina, Cristian; Grazioli, Cesare; Mahne, Nicola; Raimondi, Lorenzo; Fava, Claudio; Zangrando, Marco; Gerusina, Simone; Alagia, Michele; Avaldi, Lorenzo; Cautero, Giuseppe; de Simone, Monica; Devetta, Michele; Di Fraia, Michele; Drabbels, Marcel; Feyer, Vitaliy; Finetti, Paola; Katzy, Raphael; Kivimäki, Antti; Lyamayev, Viktor; Mazza, Tommaso; Moise, Angelica; Möller, Thomas; O'Keeffe, Patrick; Ovcharenko, Yevheniy; Piseri, Paolo; Plekan, Oksana; Prince, Kevin C; Sergo, Rudi; Stienkemeier, Frank; Stranges, Stefano; Coreno, Marcello; Callegari, Carlo

    2015-05-01

    The Low Density Matter (LDM) beamline has been built as part of the FERMI free-electron laser (FEL) facility to serve the atomic, molecular and cluster physics community. After the commissioning phase, it received the first external users at the end of 2012. The design and characterization of the LDM photon transport system is described, detailing the optical components of the beamline.

  18. SPring-8 BL44XU, beamline designed for structure analysis of large biological macromolecular assemblies

    SciTech Connect

    Higashiura, Akifumi Yamashita, Eiki; Yoshimura, Masato; Hasegawa, Kazuya; Furukawa, Yukito; Kumasaka, Takashi; Tsukihara, Tomitake; Nakagawa, Atsushi

    2016-07-27

    Beamline BL44XU at SPring-8 is operated by the Institute for Protein Research of Osaka University. The beamline is designed for X-ray crystallography of large biological macromolecular assemblies. Here we show its detailed performances, results, and the ongoing upgrade plans.

  19. Plastique: A synchrotron radiation beamline for time resolved fluorescence in the frequency domain

    NASA Astrophysics Data System (ADS)

    De Stasio, Gelsomina; Zema, N.; Antonangeli, F.; Savoia, A.; Parasassi, T.; Rosato, N.

    1991-06-01

    PLASTIQUE is the only synchrotron radiation beamline in the world that performs time resolved fluorescence experiments in frequency domain. These experiments are extremely valuable sources of information on the structure and dynamics of molecules. We describe the beamline and some initial data.

  20. The electron spectroscopy for chemical analysis microscopy beamline data acquisition system at ELETTRA

    NASA Astrophysics Data System (ADS)

    Gariazzo, C.; Krempaska, R.; Morrison, G. R.

    1996-07-01

    The electron spectroscopy for chemical analysis (ESCA) microscopy data acquisition system enables the user to control the imaging and spectroscopy modes of operation of the beamline ESCA microscopy at ELETTRA. It allows the user to integrate all experiment, beamline and machine operations in one single environment. The system also provides simple data analysis for both spectra and images data to guide further data acquisition.

  1. LISA: the Italian CRG beamline for x-ray Absorption Spectroscopy at ESRF

    NASA Astrophysics Data System (ADS)

    d'Acapito, F.; Trapananti, A.; Puri, A.

    2016-05-01

    LISA is the acronym of Linea Italiana per la Spettroscopia di Assorbimento di raggi X (Italian beamline for X-ray Absorption Spectroscopy) and is the upgrade of the former GILDA beamline installed on the BM08 bending magnet port of European Synchrotron Radiation Facility (ESRF). Within this contribution a full description of the project is provided.

  2. A modular optics design for the NuMI beamline

    SciTech Connect

    John A. Johnstone

    2002-07-23

    The Nu MI beamline discussed here is a modular optics design, characterized by 4 sections: MI {yields} beamline matching; periodic FODO cells; a special insertion to traverse the carrier pipe, and a versatile final focus section to produce the desired spot-size on the target. The use of 21 quadrupoles ensures that beam size is constrained within acceptable bounds throughout the line--{beta} < 60 m in the MI matching section & FODO cells, {beta} < 125 m in the doublets of the carrier pipe insertion, and {beta} < 100 m in the final focus. Lattice functions of the NuMI design are not unusually sensitive to errors arising either from MI optical mismatches or gradient errors, and are completely correctable through the 2 matching sections. Aperture studies indicate that the line is able to transport the worst quality beam that the Main Injector might provide. Dipole correctors at 19 of the 21 focusing centers are available to provide high-quality orbit control & further ensure that the NuMI line meets the stringent requirements for environmental protection.

  3. Design, Installation, and Initial Commissioning of the MTA Beamline

    SciTech Connect

    Moore, Craig; Anderson, John; Garcia, Fernanda; Gerardi, Michael; Johnstone, Carol; Kobilarcik, Thomas; Kucera, Michael; Kufer, Mathew; Newhart, Duane; Rakhno, Igor; Vogel, Gregory; /Fermilab

    2010-05-01

    A new experimental area designed to develop, test and verify muon ionization cooling apparatus using the 400-MeV Fermilab Linac proton beam has been fully installed and is presently being commissioned. Initially, this area was used for cryogenic tests of liquid-hydrogen absorbers for the MUCOOL R&D program and, now, for high-power beam tests of absorbers, high-gradient rf cavities in the presence of magnetic fields (including gas-filled cavities), and other prototype muon-cooling apparatus. The experimental scenarios being developed for muon facilities involve collection, capture, and cooling of large-emittance, high-intensity muon beams--{approx}10{sup 13} muons, so that conclusive tests of the apparatus require full Linac beam, which is 1.6 x 10{sup 13} p/pulse. To support the muon cooling facility, this new primary beamline extracts and transports beam directly from the Linac to the test facility. The design concept for the MuCool facility is taken from an earlier proposal [1], but modifications were necessary to accommodate high-intensity beam, cryogenics, and the increased scale of the cooling experiments. Further, the line incorporates a specialized section and utilizes a different mode of operation to provide precision measurements of Linac beam parameters. This paper reports on the technical details of the MuCool beamline for both modes.

  4. Developing a Dedicated GISAXS Beamline at the APS

    NASA Astrophysics Data System (ADS)

    Li, Xuefa; Narayanan, Suresh; Sprung, Michael; Sandy, Alec; Lee, Dong Ryeol; Wang, Jin

    2007-01-01

    As an increasingly important structural-characterization technique, grazing-incidence small-angle scattering (GISAXS) finds vast applications in nanostructures and nanocomposites at surfaces and interfaces for in situ and real-time studies because of its probing q-range (10-3 - 1 nm-1) and temporal resolution (10-3 - 1 s). At the Advanced Photon Source (APS), GISAXS techniques under thin-film waveguide-based resonance conditions were developed to study the diffusion phenomena in nanoparticle/polymer nanocomposites. Also, the kinematics of nanoparticle crystal formation at air/liquid interfaces has been obtained by the similar method in real time during the liquid droplet evaporation. To meet the strong demand from the nanoscience community, a dedicated GISAXS beamline has been designed and constructed as a part of the 8-ID-E beamline at the APS. This dedicated GISAXS setup was developed based on a 4-circle diffractometer so that precise reflectivity of the sample can be measured to complement the GISAXS analysis under the dynamical refection conditions.

  5. Microfocusing at the PG1 beamline at FLASH

    SciTech Connect

    Dziarzhytski, Siarhei; Gerasimova, Natalia; Goderich, Rene; Mey, Tobias; Reininger, Ruben; Rubhausen, Michael; Siewert, Frank; Weigelt, Holger; Brenner, Gunter

    2016-01-01

    The Kirkpatrick–Baez (KB) refocusing mirror system installed at the PG1 branch of the plane-grating monochromator beamline at the soft X-ray/XUV free-electron laser in Hamburg (FLASH) is designed to provide tight aberration-free focusing down to 4 µm × 6 µm full width at half-maximum (FWHM) on the sample. Such a focal spot size is mandatory to achieve ultimate resolution and to guarantee best performance of the vacuum-ultraviolet (VUV) off-axis parabolic double-monochromator Raman spectrometer permanently installed at the PG1 beamline as an experimental end-station. The vertical beam size on the sample of the Raman spectrometer, which operates without entrance slit, defines and limits the energy resolution of the instrument which has an unprecedented design value of 2 meV for photon energies below 70 eV and about 15 meV for higher energies up to 200 eV. In order to reach the designed focal spot size of 4 µm FWHM (vertically) and to hold the highest spectrometer resolution, special fully motorized in-vacuum manipulators for the KB mirror holders have been developed and the optics have been aligned employing wavefront-sensing techniques as well as ablative imprints analysis. Lastly, aberrations like astigmatism were minimized. In this article the design and layout of the KB mirror manipulators, the alignment procedure as well as microfocus optimization results are presented.

  6. Microfocusing at the PG1 beamline at FLASH

    DOE PAGES

    Dziarzhytski, Siarhei; Gerasimova, Natalia; Goderich, Rene; ...

    2016-01-01

    The Kirkpatrick–Baez (KB) refocusing mirror system installed at the PG1 branch of the plane-grating monochromator beamline at the soft X-ray/XUV free-electron laser in Hamburg (FLASH) is designed to provide tight aberration-free focusing down to 4 µm × 6 µm full width at half-maximum (FWHM) on the sample. Such a focal spot size is mandatory to achieve ultimate resolution and to guarantee best performance of the vacuum-ultraviolet (VUV) off-axis parabolic double-monochromator Raman spectrometer permanently installed at the PG1 beamline as an experimental end-station. The vertical beam size on the sample of the Raman spectrometer, which operates without entrance slit, defines andmore » limits the energy resolution of the instrument which has an unprecedented design value of 2 meV for photon energies below 70 eV and about 15 meV for higher energies up to 200 eV. In order to reach the designed focal spot size of 4 µm FWHM (vertically) and to hold the highest spectrometer resolution, special fully motorized in-vacuum manipulators for the KB mirror holders have been developed and the optics have been aligned employing wavefront-sensing techniques as well as ablative imprints analysis. Lastly, aberrations like astigmatism were minimized. In this article the design and layout of the KB mirror manipulators, the alignment procedure as well as microfocus optimization results are presented.« less

  7. High pressure experiments at the XAFS Beamline, INDUS-2

    NASA Astrophysics Data System (ADS)

    Ramanan, Nitya; Lahiri, Debdutta; Garg, Nandini; Bhattacharyya, D.; Jha, S. N.; Sahoo, N. K.; Sharma, Surinder M.

    2012-07-01

    The dispersive XAFS beamline BL-08 at the INDUS-2 synchrotron radiation source, RRCAT, Indore uses a bent Si (111) crystal as dispersive-cum-focusing element and a position sensitive CCD detector to enable instantaneous measurement of the whole XAFS spectrum around the absorption edge of interest. This beamline is ideal for characterisation of materials under high pressure using Diamond Anvil Cell with ~50 μm spot size. For this setup, the theoretically determined spot size (Horizontal × Vertical) varies between 17 × 137 μm and 37 × 142 μm for the x-ray energy range 5 keV-20 keV. To reduce the vertical spot size to <50 μm, we have designed an additional focusing mirror between the polychromator and sample position. The mirror, procured from SESO (France), will be installed shortly. Meanwhile, we have developed a dummy mirror bender setup at CDM (B ARC) and have carried out feasibility tests to confirm reduction in spot size using the same. We have also conducted preliminary XAFS experiments (at BL-08) on SrRuO3 at ~16 keV, under ambient conditions and inside diamond anvil cell, in order to assess the signal intensity and quality. We have obtained reasonably good signal.

  8. Status of the ELIMED Beamline at the ELIMAIA facility

    NASA Astrophysics Data System (ADS)

    Schillaci, F.; Cirrone, G. A. P.; Cuttone, G.; Romano, F.; Scuderi, V.; Allegra, L.; Amato, A.; Andó, L.; Costa, M.; Gallo, G.; Leanza, R.; Maggiore, M.; Milluzzo, G.; Petringa, G.; Pipek, J.; Russo, A. D.; Korn, G.; Margarone, D.; Leray, M. J.; Tasset-Maye, O.; Antoine, S.; Jehanno, P.

    2016-12-01

    Laser-target acceleration represents a very promising alternative to conventional accelerators for several potential applications, from the nuclear physics to the medical ones. However, some extreme features, not suitable for multidisciplinary applications, as the wide energy and angular spreads, characterize optically accelerated ion beams. Therefore, beyond the improvements at the laser-target interaction level, a lot of efforts have been recently devoted to the development of specific beam-transport devices in order to obtain controlled and reproducible output beams. In this framework, a three years contract has been signed between the INFN-LNS (IT) and Eli-Beamlines-IoP (CZ) to provide the design and the realization of a complete transport beam-line, named ELIMED, dedicated to the transport, diagnostics and dosimetry of laser-driven ion beams. The transport devices will be composed by a set of super-strong permanent magnet quadrupoles able to collect and focus laser driven ions up to 70 MeV/u, and a magnetic chicane made of conventional electromagnetic dipoles to select particles within a narrow energy range. Here, the actual status of the design and development of these magnetic systems is described.

  9. The Diamond Beamline I13L for Imaging and Coherence

    SciTech Connect

    Rau, C.; Wagner, U.; Peach, A.; Singh, B.; Wilkin, G.; Jones, C.; Robinson, I. K.

    2010-06-23

    I13L is the first long beamline at Diamond dedicated to imaging and coherence. Two independent branches will operate in the energy range of 6-30 keV with spatial resolution on the micro- to nano-lengthscale. The Imaging branch is dedicated to imaging and tomography with In-line phase contrast and full-field microscopy on the micron to nano-length scale. Ultimate resolution will be achieved on the Coherence branch at I13L with imaging techniques in the reciprocal space. The experimental stations will be located about 250 m from the source, taking advantage of the coherence properties of the source. The beamline has some outstanding features such as the mini-beta layout of the storage ring's straight section. The optical layout is optimized for beam stability and high optical quality to preserve the coherent radiation. In the experimental stations several methods will be available, starting for the first user with in-line phase contrast imaging on the imaging branch and Coherent X-ray Diffraction (CXRD) on the coherence branch.

  10. Performance of the infrared microspectroscopy beamline at CAMD

    SciTech Connect

    Kizilkaya, Orhan; Scott, John D.; Morikawa, Eizi; Garber, James D.; Perkins, Richard S.

    2005-01-01

    The first infrared (IR) beamline at the Center for Advanced Microstructures and Devices (CAMD) at Louisiana State University has been successfully constructed and commissioned. The beamline features a simple optical design with a minimal number of optical components. A pair of mirrors, planar and toroidal, is utilized for extracting synchrotron radiation (50 and 15 mrad, in horizontal and vertical directions, respectively) from the bending magnet port to a diamond window located outside of the shielding wall. Synchrotron radiation is then collimated by an off-axis parabolic mirror and fed into a Thermo Nicolet Continuum microscope through a Thermo Nicolet Nexus 670 FT-IR spectrometer. The microscope's performances with synchrotron-radiation and conventional-thermal sources were compared in the mid-IR spectral range (11 700-400 cm{sup -1}). Effective beam spot size at sample position of the microscope was measured to be 35x12 {mu}m{sup 2} (FWHM). It was also determined that synchrotron radiation has substantial advantages over the conventional thermal source: {approx}30 times better intensity and {approx}100 times better S/N at aperture size of the microscope smaller than 15x15 {mu}m{sup 2}. This performance allows infrared spectroscopy analysis in a small area with a diffraction-limited spatial resolution.

  11. NSLS transvenous coronary angiography beamline upgrade and advanced technology initiatives

    SciTech Connect

    Gmuer, N.F.; Chapman, D.; Thomlinson, W.; Thompson, A.C.; Lavender, W.M.; Scalia, K.; Malloy, N.; Mangano, J.; Jacob, J.

    1994-11-01

    Since October 1990, the coronary anatomies of a total of 16 patients (male and female) have been imaged at the National Synchrotron Light Source (NSLS) as part of the Dual Energy Digital Subtraction Transvenous Coronary Angiography research program. This program takes place in the Synchrotron Medical Research Facility (SMERF) on the X17B2 wiggler beamline. Encouraged by the success of the initial patient images, the NSLS has recently embarked on an ambitious upgrade effort. This effort covers all aspects of the X17B2 beamline and includes improved radiation shielding, a Laue monochromator assembly, a computer-controlled 5 motion patient scanning chair assembly, a fast low-noise image acquisition system, and a modularized patient safety system. These improvements will allow major advances in imaging patients based on ECG signal gating and multiple view imaging. Two advanced technology initiatives are underway with industrial collaborators. One will develop real-time image acquisition and display of the subtracted digital images. The second will develop a compact x-ray source for medical imaging. The source will be a linear electron accelerator creating characteristic radiation line emissions.

  12. NSLS transvenous coronary angiography beamline upgrade and advanced technology initiatives

    SciTech Connect

    Gmuer, N.F.; Chapman, D.; Thomlinson, W. ); Thompson, A.C. ); Lavender, W.M. ); Scalia, K.; Malloy, N. ); Mangano, J.; Jacob, J. )

    1995-02-01

    Since October 1990, the coronary anatomies of a total of 16 patients (male and female) have been imaged at the National Synchrotron Light Source (NSLS) as part of the Dual Energy Digital Subtraction Transvenous Coronary Angiography research program. This program takes place in the Synchrotron Medical Research Facility (SMERF) on the X17B2 wiggler beamline. Encouraged by the success of the initial patient images, the NSLS has recently embarked on an ambitious upgrade effort. This effort covers all aspects of the X17B2 beamline and includes improved radiation shielding, a Laue monochromator assembly, a computer-controlled five motion patient scanning chair assembly, a fast low-noise image acquisition system, and a modularized patient safety system. These improvements will allow major advances in imaging patients based on ECG signal gating and multiple view imaging. Two advanced technology initiatives are underway with industrial collaborators. One will develop real-time image acquisition and display of the subtracted digital images. The second will develop a compact x-ray source of medical imaging. The source will be a linear electron accelerator creating characteristic radiation line emissions.

  13. In situ beamline analysis and correction of active optics.

    PubMed

    Sutter, John; Alcock, Simon; Sawhney, Kawal

    2012-11-01

    At the Diamond Light Source, pencil-beam measurements have enabled long-wavelength slope errors on X-ray mirror surfaces to be examined under ultra-high vacuum and beamline mounting without the need to remove the mirror from the beamline. For an active mirror an automated procedure has been implemented to calculate the actuator settings that optimize its figure. More recently, this in situ pencil-beam method has been applied to additional uses for which ex situ measurements would be inconvenient or simply impossible. First, it has been used to check the stability of the slope errors of several bimorph mirrors at intervals of several weeks or months. Then, it also proved useful for the adjustment of bender and sag compensation actuators on mechanically bent mirrors. Fits to the bending of ideal beams have been performed on the slope errors of a mechanically bent mirror in order to distinguish curvatures introduced by the bending actuators from gravitational distortion. Application of the optimization procedure to another mechanically bent mirror led to an improvement of its sag compensation mechanism.

  14. Parametric Optimization of Undulators for NSLS-II Project Beamlines

    NASA Astrophysics Data System (ADS)

    Chubar, O.; Bengtsson, J.; Berman, L.; Broadbent, A.; Cai, Y. Q.; Hulbert, S.; Shen, Q.; Tanabe, T.

    2010-06-01

    General optimization procedure, computation methods used, and the obtained optimal parameters of undulators for the NSLS-II project beamlines are reported. The optimization starts with high-accuracy calculation of undulator magnetic fields, using Radia magnetostatics code, for a large set of periods and vertical gaps of a given undulator type, given magnetic materials and a scalable magnet geometry. From the resulting magnetic fields, a sub-set of undulator periods and the corresponding vertical gaps, providing the required low-energy cut-off values of spectral harmonics for each particular beamline, is determined. In parallel, from the same Radia undulator models, angular magnetic kick maps are calculated, and the insertion device effect on electron beam is simulated using Tracy-2 tracking code based on symplectic integrator. After these simulations, magnet parameters are fine-tuned and the maximal acceptable undulator lengths are determined for different straight sections, as functions of minimal gap and with due regard for the electron beam vertical "stay clear" constraint in the case of in-vacuum undulators. Finally, the optimal undulator period and length are determined as the values providing maximal spectral flux among the pre-selected undulator cases, already satisfying the requirements concerning the harmonic cut-off values and the effect on electron beam.

  15. Dedicated Beamline Facilities for Catalytic Research. Synchrotron Catalysis Consortium (SCC)

    SciTech Connect

    Chen, Jingguang; Frenkel, Anatoly; Rodriguez, Jose; Adzic, Radoslav; Bare, Simon R.; Hulbert, Steve L.; Karim, Ayman; Mullins, David R.; Overbury, Steve

    2015-03-04

    Synchrotron spectroscopies offer unique advantages over conventional techniques, including higher detection sensitivity and molecular specificity, faster detection rate, and more in-depth information regarding the structural, electronic and catalytic properties under in-situ reaction conditions. Despite these advantages, synchrotron techniques are often underutilized or unexplored by the catalysis community due to various perceived and real barriers, which will be addressed in the current proposal. Since its establishment in 2005, the Synchrotron Catalysis Consortium (SCC) has coordinated significant efforts to promote the utilization of cutting-edge catalytic research under in-situ conditions. The purpose of the current renewal proposal is aimed to provide assistance, and to develop new sciences/techniques, for the catalysis community through the following concerted efforts: Coordinating the implementation of a suite of beamlines for catalysis studies at the new NSLS-II synchrotron source; Providing assistance and coordination for catalysis users at an SSRL catalysis beamline during the initial period of NSLS to NSLS II transition; Designing in-situ reactors for a variety of catalytic and electrocatalytic studies; Assisting experimental set-up and data analysis by a dedicated research scientist; Offering training courses and help sessions by the PIs and co-PIs.

  16. Electronic absorption spectroscopy of matrix-isolated polycyclic aromatic hydrocarbon cations. I - The naphthalene cation (C10H8/+/)

    NASA Technical Reports Server (NTRS)

    Salama, F.; Allamandola, L. J.

    1991-01-01

    The ultraviolet, visible, and near-infrared absorption spectra of naphthalene (C10H8) and its radical ion (C10H8/+/), formed by vacuum ultraviolet irradiation, were measured in argon and neon matrices at 4.2 K. The associated vibronic band systems and their spectroscopic assignments are discussed together with the physical and chemical conditions governing ion production in the solid phase. The absorption coefficients were calculated for the ion and found lower than previous values, presumably due to the low polarizability of the neon matrix.

  17. Performance of beamline 9.3.1 at the ALS: Flux and resolution measurements

    SciTech Connect

    Uehara, Y.; Fischer, G.; Kring, J.; Perera, R.C.C.

    1997-04-01

    Beamline 9.3.1 at the ALS is a windowless beamline, covering the 1-6 keV photon-energy range. This beamline is the first monochromatic hard x-ray beamline in the ALS, and designed to achieve the goals of high energy resolution, and preservation of the high brightness from the ALS. It consists of a new {open_quotes}Cowan type{close_quotes} double-crystal monochromator and two toroidal mirrors which are positioned before and after the monochromator. The construction of the beamline was completed in December of 1995, with imperfect mirrors. In this report, the authors describe the experimental results of absolute flux measurements and x-ray absorption measurements of gases and solid samples using the present set of mirrors.

  18. The macromolecular crystallography beamline I911-3 at the MAX IV laboratory

    PubMed Central

    Ursby, Thomas; Unge, Johan; Appio, Roberto; Logan, Derek T.; Fredslund, Folmer; Svensson, Christer; Larsson, Krister; Labrador, Ana; Thunnissen, Marjolein M. G. M.

    2013-01-01

    The macromolecular crystallography beamline I911-3, part of the Cassiopeia/I911 suite of beamlines, is based on a superconducting wiggler at the MAX II ring of the MAX IV Laboratory in Lund, Sweden. The beamline is energy-tunable within a range between 6 and 18 keV. I911-3 opened for users in 2005. In 2010–2011 the experimental station was completely rebuilt and refurbished such that it has become a state-of-the-art experimental station with better possibilities for rapid throughput, crystal screening and work with smaller samples. This paper describes the complete I911-3 beamline and how it is embedded in the Cassiopeia suite of beamlines. PMID:23765310

  19. The Protein Micro-Crystallography Beamlines for Targeted Protein Research Program

    NASA Astrophysics Data System (ADS)

    Hirata, Kunio; Yamamoto, Masaki; Matsugaki, Naohiro; Wakatsuki, Soichi

    In order to collect proper diffraction data from outstanding micro-crystals, a brand-new data collection system should be designed to provide high signal-to noise ratio in diffraction images. SPring-8 and KEK-PF are currently developing two micro-beam beamlines for Targeted Proteins Research Program by MEXT of Japan. The program aims to reveal the structure and function of proteins that are difficult to solve but have great importance in both academic research and industrial application. At SPring-8, a new 1-micron beam beamline for protein micro-crystallography, RIKEN Targeted Proteins Beamline (BL32XU), is developed. At KEK-PF a new low energy micro-beam beamline, BL-1A, is dedicated for SAD micro-crystallography. The two beamlines will start operation in the end of 2010. The present status of the research and development for protein micro-crystallography will be presented.

  20. Interlock systems using programmable sequence controllers and a monitoring system of the Photon Factory beamlines

    NASA Astrophysics Data System (ADS)

    Satow, Yoshinori; Ito, Kenji; Kosuge, Takashi

    1989-07-01

    Fully utilizing programmable sequence controllers, interlock systems for the Photon Factory beamlines were newly designed and constructed for providing the reliable and versatile control logic that is required for beamline characteristics. The systems, accommodated with radiation safety and vacuum interlock logic as well as protection logic for various components against heat and radiation damage, are in operation on eight beamlines. A centralized monitoring system, to which all interlock systems for the beamlines are connected through optical fiber links, was constructed for simultaneously monitoring the operation status of the interlock systems. Individual operations of each interlock system are also controlled by the monitoring system. Log data collected by the monitoring system are summarized and analyzed in order to provide the necessary information for smooth and safe operation as well as for further improvements of the beamlines. The interlock and the monitoring systems are described along with operational remarks.

  1. WIFIP: a web-based user interface for automated synchrotron beamlines.

    PubMed

    Sallaz-Damaz, Yoann; Ferrer, Jean Luc

    2017-09-01

    The beamline control software, through the associated graphical user interface (GUI), is the user access point to the experiment, interacting with synchrotron beamline components and providing automated routines. FIP, the French beamline for the Investigation of Proteins, is a highly automatized macromolecular crystallography (MX) beamline at the European Synchrotron Radiation Facility. On such a beamline, a significant number of users choose to control their experiment remotely. This is often performed with a limited bandwidth and from a large choice of computers and operating systems. Furthermore, this has to be possible in a rapidly evolving experimental environment, where new developments have to be easily integrated. To face these challenges, a light, platform-independent, control software and associated GUI are required. Here, WIFIP, a web-based user interface developed at FIP, is described. Further than being the present FIP control interface, WIFIP is also a proof of concept for future MX control software.

  2. Commissioning and first results of scanning type EXAFS beamline (BL-09) at INDUS-2 synchrotron source

    SciTech Connect

    Poswal, A. K. Agrawal, A. Yadav, A. K. Nayak, C. Basu, S. Bhattachryya, D.; Jha, S. N.; Sahoo, N. K.; Kane, S. R.; Garg, C. K.

    2014-04-24

    An Energy Scanning X-ray Absorption Fine Structure spectroscopy beamline has recently been installed and commissioned at BL-09 bending magnet port of INDUS-2 synchrotron source, Indore. The beamline uses an UHV compatible fixed exit double crystal monochromator (DCM) with two Si (111) crystals. Two grazing incidence cylindrical mirrors are also used in this beamline; the pre-mirror is used as a collimating mirror while the post mirror is used for vertical focusing and higher harmonic rejection. In this beamline it is possible to carry out EXAFS measurements both in transmission and fluorescence mode on various types of samples, using Ionization chamber detectors and solid state drift detector respectively. In this paper, results from first experiments of the Energy Scanning EXAFS beamline are presented.

  3. Satellite Power Systems (SPS) concept definition study. Volume 4: Transportation analysis

    NASA Technical Reports Server (NTRS)

    Hanley, G. M.

    1980-01-01

    Transportation system elements were synthesized and evaluated on the basis of their potential to satisfy overall satellite (SPS) transportation requirements and of their sensitivities, interfaces, and impact on the SPS. Additional analyses and investigations were conducted to further define transportation system concepts that will be needed for the developmental and operational phases of an SPS program. To accomplish these objectives, transportation systems such as shuttle and its derivatives have been identified; new heavy lift launch vehicle concepts, cargo and personnel orbital transfer vehicles and intra-orbit transfer vehicle concepts have been evaluated. To a limited degree, the program implications of their operations and costs were assessed. The results of these analyses have been integrated into other elements of the overall SPS concept definition studies.

  4. Synthesis of nanostructured iron oxides and new magnetic ceramics using sol-gel and SPS techniques

    NASA Astrophysics Data System (ADS)

    Papynov, E. K.; Shichalin, O. O.; Belov, A. A.; Portnyagin, A. S.; Mayorov, V. Yu.; Gridasova, E. A.; Golub, A. V.; Nepomnyashii, A. S.; Tananaev, I. G.; Avramenko, V. A.

    2017-02-01

    The original way of synthesis of nanostructured iron oxides and based on them magnetic ceramics via sequential combination of sol-gel and SPS technologies has been suggested. High quality of nanostructured iron oxides is defined by porous structure (Sspec up to 47,3 n2/g) and by phase composition of mixed and individual crystal phases (γ-Fe2O3/Fe3O4 i α-Fe2O3), depending on synthesis conditions. High-temperature SPS consolidation of nanostructured hematite powder, resulting in magnetic ceramics of high mechanical strength (fracture strength 249 MPa) has been investigated. Peculiarities of change of phase composition and composite's microstructure in the range of SPS temperatures from 700 to 900 °C have been revealed. Magnetic properties have been studied and regularities of change of magnetization (Ms) and coercive force (Hc) values of the ceramics with respect to SPS sintering temperature have been described.

  5. SPS susceptible-system cost factors investment summary and mitigation-cost-increment estimates

    SciTech Connect

    Morrison, E L

    1980-05-01

    The Electromagnetic Compatibility (EMC) evaluation program supporting the SPS Concept Development Evaluation Phase has included examinations of the degradation in capability of all susceptible communications and electronic systems that could be exposed to SPS emissions, the development and testing of mitigation techniques to allow operation in the SPS environment, and the development of total investment and mitigation cost data. Mitigation costs relate only to the modification or reconfiguration of susceptible systems; redeployment being a possible consideration for rectenna siting exercises during the SPS Engineering Development Phase. An extensive survey is summarized regarding the current and planned facilities using the equipment categories listed: microwave communications; radar systems; sensors; computers; medical equipment; and research support. Current investment, future plans, and mitigation costs are presented, with geographic distribution in six CONUS areas.

  6. Grundzüge der SPS-Norm IEC 61131-3

    NASA Astrophysics Data System (ADS)

    Wellenreuther, Günter; Zastrow, Dieter

    Auch wenn das Programmieren von Steuerungen und Regelungen noch immer ein sehr individueller Prozess ist, muss seit Jahren der Standard der SPS-Programmier-Norm IEC 61131-3 zu Grunde gelegt werden, der eine rationellere Programmerstellung und größere Herstellerunabhängigkeit zum Ziel hat. Den Anwendungsprogrammierern müssen wirksame Mittel an die Hand gegeben werden, um wiederverwendbare und damit kostensparende Programme entwickeln zu können. Die Norm IEC 61131-3 bzw. DIN EN 61131-3 richtet sich daher in erster Linie an SPS-Hersteller. Für Anwendungsprogrammierer ist die SPS-Norm eher ein Dokument im Hintergrund, denn sie sind für ihre Arbeit auf ein reales IEC 61131-3 kompatibles Programmier- und SPS-System angewiesen.

  7. Prospects for an experiment to measure at the CERN SPS

    NASA Astrophysics Data System (ADS)

    Moulson, M.

    2017-01-01

    Precise measurements of the branching ratios for the decays can provide unique constraints on CKM unitarity and, potentially, evidence for new physics. It is important to measure both decay modes, and , since different new physics models affect the rates for each channel differently. We are investigating the feasibility of performing a measurement of using a high-energy secondary neutral beam at the CERN SPS in a successor experiment to NA62. The planned experiment would reuse some of the NA62 infrastructure, including possibly the NA48 liquid-krypton calorimeter. The mean momentum of mesons decaying in the fiducial volume is 70 GeV; the decay products are boosted forward, so that less demanding performance is required from the large-angle photon veto detectors. On the other hand, the layout poses particular challenges for the design of the small-angle vetoes, which must reject photons from decays escaping through the beam pipe amidst an intense background from soft photons and neutrons in the beam. We present some preliminary conclusions from our feasibility studies, summarizing the design challenges faced and the sensitivity obtainable for the measurement of .

  8. Solar power satellite system definition study. Volume 4: Solid State SPS Analysis, Phase 3

    NASA Technical Reports Server (NTRS)

    1980-01-01

    A 2500 megawatt solid ground output Solar Power Satellite (SPS) of conventional configuration was designed and analyzed. Because the power per receiving antenna is halved, as compared with the klystron reference, twice the number of receiving antennas are needed to deliver the same total power. The solid state approach appears feasible with a slightly greater specific mass and slightly higher cost than the klystron SPS design.

  9. Design and prototyping of HL-LHC double quarter wave crab cavities for SPS test

    SciTech Connect

    Verdu-Andres, S.; Skaritka, J.; Wu, Q.; Xiao, B.; Belomestnykh, S.; Ben-Zvi, I.; Alberty, L.; Artoos, K.; Calaga, R.; Capatina, O.; Capelli, T.; Carra, F.; Leuxe, R.; Kuder, N.; Zanoni, C.; Li, Z.; Ratti, A.

    2015-05-03

    The LHC high luminosity project envisages the use of the crabbing technique for increasing and levelling the LHC luminosity. Double Quarter Wave (DQW) resonators are compact cavities especially designed to meet the technical and performance requirements for LHC beam crabbing. Two DQW crab cavities are under fabrication and will be tested with beam in the Super Proton Synchrotron (SPS) at CERN by 2017. This paper describes the design and prototyping of the DQW crab cavities for the SPS test.

  10. Performance of exponential coupler in the SPS with LHC type beam for transverse broadband instability analysis

    SciTech Connect

    de Maria,R.; Fox, J. D.; Hofle, W.; Kotzian, G.; Rumolo, G.; Salvant, B.; Wehrle, U.

    2009-05-25

    We present the performance and limitations of the SPS exponential coupler [1] for transverse instability measurements with LHC type beam. Data were acquired in 2008 in the SPS in the time domain with a bandwidth of up to 2.5 GHz. The data were filtered to extract the time evolution of transverse oscillations within the less than 5 ns long LHC type bunches. We describe the data filtering techniques and show the limitations of the pick-up due to propagating modes.

  11. Preliminary assessment of the Satellite Power System (SPS) and six other energy technologies

    NASA Astrophysics Data System (ADS)

    Wolsko, T.; Brown, C.; Cirillo, R.; Gasper, J. R.; Habegger, L. J.; Hub, K.; Levine, E.; Newsom, D.; Samsa, M.; Tanzman, E.

    1980-04-01

    Six alternative technologies (conventional coal combustion; light water reactor; coal gasification/combined cycle; liquid metal, fast breeder reactor; terrestrial photovoltaic; and fusion) were compared to the SPS on the basis of available data on cost and performance, health and safety, environmental welfare, resource requirements, and economics. These comparisons are descriptive and do not culminate in any bottom line regarding the overall viability of the SPS.

  12. Construction and Commissioning of A 248 m-long Beamline with X-ray Undulator Light Source

    SciTech Connect

    Suzuki, Yoshio; Uesugi, Kentaro; Takimoto, Naoki; Fukui, Tomoki; Aoyama, Kohki; Takeuchi, Akihisa; Takano, Hidekazu; Yagi, Naoto; Mochizuki, Tetsuro; Goto, Shunji; Takeshita, Kunikazu; Takahashi, Sunao; Ohashi, Haruhiko; Furukawa, Yukito; Ohata, Tohru; Matsushita, Tomohiro; Ishizawa, Yasuhide; Yamazaki, Hiroshi; Yabashi, Makina

    2004-05-12

    A medium-length beamline with undulator source, BL20XU at SPring-8, was constructed, and opened to public use. The distance from source point to the end of the beamline is 248 m. By utilizing the long beam transport path, the beamline has advantages for experiment that requires high spatial coherence in hard X-ray regions.

  13. Distribution of 3H-8-MOP and its metabolites in rat organs after a single oral administration

    SciTech Connect

    Wulf, H.C.; Andreasen, M.P.

    1981-04-01

    Concentrations of 3H-8-methoxypsoralen (MOP), its lipid- and water soluble metabolites and tritiated water have been measured in rat serum, liver, kidney, and skin, using liquid scintillation, thin-layer chromatography and other techniques. Radioactivity in whole blood, plasma, ovary, adrenals, and pancreas has also been measured. The radioactivty has been measured up to 1 week after medication, while 3H-8-MOP and metabolite concentrations have been measured from 10 min to 24 h after medication with a single dose of 1 mg 3H-8-MOP in solution/kg bodyweight. Maximum 8-MOP concentrations were seen from 10 to 30 min after dosing. The concentrations in microgram/kg 10 min, 2 h, and 24 h after medication were as follows: serum--686, 57, 2.1; liver--489, 45, 3.3; kidney--1708, 139, 4.3; and skin--55, 16, 3.8. The concentrations of water soluble metabolites were very high in the liver and only slightly lower in the kidney. The concentrations of these metabolites might accumulate after doses repeated 4 times a week. 3H-8-MOP and its metabolites would not show similar accumulation. Most of the radioactivity present after 1 week is due to trititated water.

  14. Strains of Escherichia coli O157:H8 from human diarrhoea belong to attaching and effacing class of E coli.

    PubMed Central

    Scotland, S M; Willshaw, G A; Cheasty, T; Rowe, B

    1992-01-01

    AIMS: To determine whether 17 Escherichia coli O157:H8 strains isolated from patients with diarrhoea in the United Kingdom were putative pathogens. METHODS: The strains had been isolated by the use of O157 antiserum, available for the detection of Vero cytotoxin (VT) producing strains of E coli O157 that are usually of flagellar (H) type 7, but may also be non-motile. The strains were examined for VT production, for their ability to adhere to HEp-2 cells, and for hybridisation with several DNA probes that recognise pathogenic properties of E coli. Their ability to ferment sorbitol and to produce beta-glucuronidase was also investigated, as these tests are used to discriminate VT positive O157 strains. RESULTS: The O157:H8 strains did not produce VT. All gave localised attachment to HEp-2 cells, associated with a positive fluorescence-actin staining test, and all hybridised with the E coli attaching and effacing (eae) probe. In addition to the difference in VT production, O157:H8 strains could be distinguished from VT positive O157 strains by their beta-glucuronidase activity, their failure to produce enterohaemolysin, and their lack of hybridisation with the CVD419 probe derived from a plasmid in an O157:H7 strain. CONCLUSIONS: The 0157:H8 strains had in vitro properties characteristic of the class of E coli that causes attaching and effacing lesions in epithelial intestinal cells. They may therefore be considered a putative cause of diarrhoea but their prevalence remains to be established. Several O157:H8 strains failed to ferment sorbitol in agar plates and therefore could be misidentified as VT positive O157 strains. Confirmatory tests for VT production are needed when O157 strains are isolated from faeces. PMID:1479033

  15. Imaging and microtomography facility at the ESRF beamline ID 22

    NASA Astrophysics Data System (ADS)

    Weitkamp, Timm; Raven, Carsten; Snigirev, Anatoly A.

    1999-09-01

    At the ESRF micro-fluorescence, imaging and diffraction ((mu) - FID) beamline ID 22, a microtomography setup has been operational for several months. The coherence properties of the high-energy (10 to 70 keV) X-ray undulator beam at ID 22 make the setup especially suited for phase-contrast tomography including possible holographic reconstruction, but it has also provided to be well adapted to absorption tomography. A fast- readout, low-noise CCD camera makes time-resolved imaging possible. Recent developments in magnifying X-ray optics such as Compound Refractive Lenses (CRL) and Fresnel Zone Plates (FZP) open up the field of magnified-X-ray imaging with a resolution of less than 300 nm. Imaging techniques using a 'pink beam,' i.e. a beam with limited monochromaticity obtained by filtering one harmonic from the undulator spectrum, can increase flux in intensity-limited experiments.

  16. J-PARC accelerator and neutrino beamline upgrade programme

    NASA Astrophysics Data System (ADS)

    Friend, M.

    2017-09-01

    The 30 GeV proton beam from the J-PARC Main Ring (MR) accelerator is used to produce a world-class conventional neutrino beam – the neutrino source for the J-PARC long-baseline neutrino programme, including the current T2K experiment and proposed future experiments. Planned upgrades to increase the beam power of the MR from the current ∼400 kW to the design power of 750 kW and beyond, to 1.3+ MW, are underway. These include hardware modifications, such as upgrades of the MR magnet power supplies, RF systems, and feedback systems, as well as a change of the MR beam betatron tune point. Upgrades to the neutrino beamline, such as to the proton beam monitoring, horns, and radioactive material handling, will also be required to accommodate the increased proton beam power. An overview of planned J-PARC MR and neutrino facility upgrades is given.

  17. Microfocusing at the PG1 beamline at FLASH

    PubMed Central

    Dziarzhytski, Siarhei; Gerasimova, Natalia; Goderich, Rene; Mey, Tobias; Reininger, Ruben; Rübhausen, Michael; Siewert, Frank; Weigelt, Holger; Brenner, Günter

    2016-01-01

    The Kirkpatrick–Baez (KB) refocusing mirror system installed at the PG1 branch of the plane-grating monochromator beamline at the soft X-ray/XUV free-electron laser in Hamburg (FLASH) is designed to provide tight aberration-free focusing down to 4 µm × 6 µm full width at half-maximum (FWHM) on the sample. Such a focal spot size is mandatory to achieve ultimate resolution and to guarantee best performance of the vacuum-ultraviolet (VUV) off-axis parabolic double-monochromator Raman spectrometer permanently installed at the PG1 beamline as an experimental end-station. The vertical beam size on the sample of the Raman spectrometer, which operates without entrance slit, defines and limits the energy resolution of the instrument which has an unprecedented design value of 2 meV for photon energies below 70 eV and about 15 meV for higher energies up to 200 eV. In order to reach the designed focal spot size of 4 µm FWHM (vertically) and to hold the highest spectrometer resolution, special fully motorized in-vacuum manipulators for the KB mirror holders have been developed and the optics have been aligned employing wavefront-sensing techniques as well as ablative imprints analysis. Aberrations like astigmatism were minimized. In this article the design and layout of the KB mirror manipulators, the alignment procedure as well as microfocus optimization results are presented. PMID:26698054

  18. Development of a Niobium Bellow for Beamline Connections

    SciTech Connect

    Larry Turlington; John Brawley; Robert Manus; Stephen Manning; Samuel Morgan; Gary Slack; Peter Kneisel

    2003-09-01

    Superconducting cavities in an accelerator assembly are usually connected at the beampipes by stainless steel bellows. They operate at an intermediate temperature, compensating for alignment tolerances on the cavity beamlines and for thermal contraction during cooldown to cryogenic temperatures. This transition from one cavity to the next in a cavity string is typically of the order of 3/2 wavelength along with approximately half a wavelength taken up by the bellows. If one could incorporate a niobium bellows in the beam pipe, this distance could be reduced by half a wave length. In the case of a big accelerator such as TESLA the overall cavity length for the accelerator could be reduced by roughly 10% or 2000 m. In terms of cost savings this would amount to several million dollars. Based on this estimate we have begun to develop a niobium bellows to be used on a 2.75 inch diameter beamline. It is made from 0.3 mm thick niobium sheet, rolled into a tube and secured by a longitudinal full penetration electron beam weld; the weld is made with a high speed a narrow, focused beam reducing the heat affected zone, thus limiting the grain growth, which could affect the formability. Subsequently, two convolutions have been pressed into this tube in a 2-stage process, using an external die and a polyurethane internal expander. Niobium cuffs and flanges were electron beam welded to the formed bellows, which facilitated leak testing and allowed some measurements of compression/expansion and bending. In this contribution the fabrication process and the subsequent mechanical and vacuum tests with the bellows will be described.

  19. Shielding Design Aspects of SR Beamlines for 3-GeV And 8-GeV Class Synchrotron Radiation Facilities

    SciTech Connect

    Asano, Yoshihiro; Liu, James C.; Rokni, Sayed; /SLAC

    2007-09-24

    Differences in synchrotron radiation beamline shielding design between the facilities of 3 GeV class and 8 GeV class are discussed with regard to SLAC SSRL and SPring-8 beamlines. Requirements of beamline shielding as well as the accelerator shielding depend on the stored electron energy, and here some factors in beamline shielding depending on the stored energy in particular, are clarified, namely the effect of build up, the effect of double scattering of photons at branch beamlines, and the spread of gas bremsstrahlung.

  20. Satellite power system (SPS) brightness due to reflected sunlight

    SciTech Connect

    1980-10-01

    The development and operation of a Satellite Power System would place very large structures in orbit around earth for several decades. Sunlight reflected off such structures, particularly specular components from large flat areas, is expected to create ground illumination that will attract observers. In order to assure that this illumination does not exceed the irradiance tolerances of the eye, reflections from these satellites must be carefully controlled by vehicle orientation and surface specifications. The solar power satellite (SPS) at geosynchronous earth orbit (GEO) has 55 km/sup 2/ of glass covered solar cells that are oriented normal to the sun, as well as a 1 km/sup 2/ microwave antenna. Transportation of construction materials from low earth orbit (LEO) to GEO requires 23 Orbit Transfer Vehicles (OTVs) that have 1.6 km/sup 2/ solar panels oriented normal to the sun during their 6 month transits. The Staging Base (SB) at LEO, that accommodates OTV fabrication and cargo transfer, consists of 0.5 km arms protruding from a .44 km/sup 2/ open grid aligned with its orbit plane. Diffuse reflections would make the SB/OTVs readily discernible in the daytime and the OTVs and SPSs observable all night (except during eclipse). Sporadic specular glints would appear on the ground from the OTVs and SPSs near the midnight meridian, from the solar panel surfaces of OTVs during LEO fabrication around midday, and from OTVs near LEO at dawn and dusk. The ground level irradiance has been evaluated for several unusually bright configurations using the present system design. Procedures and results are presented and discussed.

  1. Undulator beamline of the Brockhouse sector at the Canadian Light Source

    SciTech Connect

    Diaz, B. E-mail: skycia@uoguelph.ca; Gomez, A.; Duffy, A.; Hallin, E.; Meyer, B.; Kycia, S. E-mail: skycia@uoguelph.ca

    2014-08-15

    The Brockhouse project at the Canadian Light Source plans the construction of three beamlines, two wiggler beamlines, and one undulator beamline, that will be dedicated to x-ray diffraction and scattering. In this work, we will describe the undulator beamline main components and performance parameters, obtained from ray tracing using XOP-SHADOW codes. The undulator beamline will operate from 4.95 to 21 keV, using a 20 mm period hybrid undulator placed upstream of the wiggler in the same straight section. The beamline optics design was developed in cooperation with the Brazilian Synchrotron - LNLS. The beamline will have a double crystal monochromator with the options of Si(111) or Si(311) crystal pairs followed by two mirrors in the KB configuration to focus the beam at the sample position. The high brilliance of the undulator source will produce a very high flux of ∼10{sup 13} photons/s and high energy resolution into a small focus of 170 μm horizontal and 20-60 μm vertical, depending on the optical configuration and energy chosen. Two multi-axis goniometer experimental stations with area detectors and analyzers are foreseen to enable diffraction, resonant and inelastic scattering experiments, and SAXS/WAXS experiments with high resolution and time resolving capabilities.

  2. The ELIMED transport and dosimetry beamline for laser-driven ion beams

    NASA Astrophysics Data System (ADS)

    Romano, F.; Schillaci, F.; Cirrone, G. A. P.; Cuttone, G.; Scuderi, V.; Allegra, L.; Amato, A.; Amico, A.; Candiano, G.; De Luca, G.; Gallo, G.; Giordanengo, S.; Guarachi, L. Fanola; Korn, G.; Larosa, G.; Leanza, R.; Manna, R.; Marchese, V.; Marchetto, F.; Margarone, D.; Milluzzo, G.; Petringa, G.; Pipek, J.; Pulvirenti, S.; Rizzo, D.; Sacchi, R.; Salamone, S.; Sedita, M.; Vignati, A.

    2016-09-01

    A growing interest of the scientific community towards multidisciplinary applications of laser-driven beams has led to the development of several projects aiming to demonstrate the possible use of these beams for therapeutic purposes. Nevertheless, laser-accelerated particles differ from the conventional beams typically used for multiscipilinary and medical applications, due to the wide energy spread, the angular divergence and the extremely intense pulses. The peculiarities of optically accelerated beams led to develop new strategies and advanced techniques for transport, diagnostics and dosimetry of the accelerated particles. In this framework, the realization of the ELIMED (ELI-Beamlines MEDical and multidisciplinary applications) beamline, developed by INFN-LNS (Catania, Italy) and that will be installed in 2017 as a part of the ELIMAIA beamline at the ELI-Beamlines (Extreme Light Infrastructure Beamlines) facility in Prague, has the aim to investigate the feasibility of using laser-driven ion beams for multidisciplinary applications. In this contribution, an overview of the beamline along with a detailed description of the main transport elements as well as the detectors composing the final section of the beamline will be presented.

  3. Undulator beamline of the Brockhouse sector at the Canadian Light Source.

    PubMed

    Diaz, B; Gomez, A; Meyer, B; Duffy, A; Hallin, E; Kycia, S

    2014-08-01

    The Brockhouse project at the Canadian Light Source plans the construction of three beamlines, two wiggler beamlines, and one undulator beamline, that will be dedicated to x-ray diffraction and scattering. In this work, we will describe the undulator beamline main components and performance parameters, obtained from ray tracing using XOP-SHADOW codes. The undulator beamline will operate from 4.95 to 21 keV, using a 20 mm period hybrid undulator placed upstream of the wiggler in the same straight section. The beamline optics design was developed in cooperation with the Brazilian Synchrotron - LNLS. The beamline will have a double crystal monochromator with the options of Si(111) or Si(311) crystal pairs followed by two mirrors in the KB configuration to focus the beam at the sample position. The high brilliance of the undulator source will produce a very high flux of ~10(13) photons/s and high energy resolution into a small focus of 170 μm horizontal and 20-60 μm vertical, depending on the optical configuration and energy chosen. Two multi-axis goniometer experimental stations with area detectors and analyzers are foreseen to enable diffraction, resonant and inelastic scattering experiments, and SAXS/WAXS experiments with high resolution and time resolving capabilities.

  4. Satellite Power Systems (SPS) concept definition study, exhibit C. Volume 2, part 2: System engineering, cost and programmatics

    NASA Technical Reports Server (NTRS)

    Hanley, G. M.

    1979-01-01

    Volume 2, Part 2, of a seven volume Satellite Power Systems (SPS) report is presented. Part 2 covers cost and programmatics and is divided into four sections. The first section gives illustrations of the SPS reference satellite and rectenna concept, and an overall scenario for SPS space transportation involvement. The second section presents SPS program plans for the implementation of PHASE C/D activities. These plans describe SPS program schedules and networks, critical items of systems evolution/technology development, and the natural resources analysis. The fourth section presents summary comments on the methods and rationale followed in arriving at the results documented. Suggestions are also provided in those areas where further analysis or evaluation will enhance SPS cost and programmatic definitions.

  5. Produced Water Treatment Using the Switchable Polarity Solvent Forward Osmosis (SPS FO) Desalination Process: Preliminary Engineering Design Basis

    SciTech Connect

    Wendt, Daniel; Adhikari, Birendra; Orme, Christopher; Wilson, Aaron

    2016-05-01

    Switchable Polarity Solvent Forward Osmosis (SPS FO) is a semi-permeable membrane-based water treatment technology. INL is currently advancing SPS FO technology such that a prototype unit can be designed and demonstrated for the purification of produced water from oil and gas production operations. The SPS FO prototype unit will used the thermal energy in the produced water as a source of process heat, thereby reducing the external process energy demands. Treatment of the produced water stream will reduce the volume of saline wastewater requiring disposal via injection, an activity that is correlated with undesirable seismic events, as well as generate a purified product water stream with potential beneficial uses. This paper summarizes experimental data that has been collected in support of the SPS FO scale-up effort, and describes how this data will be used in the sizing of SPS FO process equipment. An estimate of produced water treatment costs using the SPS FO process is also provided.

  6. Imaging in real and reciprocal space at the Diamond beamline I13

    NASA Astrophysics Data System (ADS)

    Rau, C.; Wagner, U. H.; Vila-Comamala, J.; Bodey, A.; Parson, A.; García-Fernández, M.; De Fanis, A.; Pešić, Z.

    2016-01-01

    The Diamond Imaging and Coherence beamline I13 consists of two independent branchlines for imaging in real and reciprocal space. Different microscopies are available providing a range of spatial resolution from 5µm to potentially 5nm. The beamline operates in the energy range of 6-35keV covering different scientific areas such as biomedicine, materials science and geophysics. Several original devices have been developed at the beamline, such as the EXCALIBUR photon counting detector and the combined robot arms for coherent X-ray diffraction.

  7. Design Concept and Performance of the Soft X-ray Beamline HiSOR-BL14

    SciTech Connect

    Sawada, M.; Namatame, H.; Yaji, K.; Nagira, M.; Kimura, A.; Taniguchi, M.

    2007-01-19

    The soft X-ray beamline HiSOR-BL14 has been constructed at Hiroshima Synchrotron Radiation Center, aimed at absorption spectroscopy and photoelectron spectroscopy with linearly and circularly polarized light. The beamline layout is based on a Dragon-type design with a spherical grating monochromator. The beamline is able to accept synchrotron radiation from the bending magnet part of the HiSOR ring with a wide solid angle. The large horizontal angular acceptance and vertical one contribute to high photon flux and controllability of light polarization, respectively. Our performance test indicates that high resolving power has been achieved with sufficient photon flux to carry out spectroscopic experiments.

  8. First results from the high-brightness x-ray spectroscopy beamline at ALS

    SciTech Connect

    Perera, R.C.C.; Ng, W.; Jones, G.

    1997-04-01

    Beamline 9.3.1 at the Advanced Light Source (ALS) is a windowless beamline, covering the 1-6 keV photon-energy range, designed to achieve the goal of high brightness at the sample for use in the X-ray Atomic and Molecular Spectroscopy (XAMS) science, surface and interface science, biology and x-ray optical development programs at ALS. X-ray absorption and time of flight photo emission measurements in 2 - 5 keV photon energy in argon along with the flux, resolution, spot size and stability of the beamline will be discussed. Prospects for future XAMS measurements will also be presented.

  9. Progress of projection computed tomography by upgrading of the beamline 37XU of SPring-8

    SciTech Connect

    Terada, Yasuko Suzuki, Yoshio; Uesugi, Kentaro; Miura, Keiko

    2016-01-28

    Beamline 37XU at SPring-8 has been upgraded for nano-focusing applications. The length of the beamline has been extended to 80 m. By utilizing this length, the beamline has advantages for experiments such as X-ray focusing, X-ray microscopic imaging and X-ray computed tomography. Projection computed tomography measurements were carried out at experimental hutch 3 located 80 m from the light source. CT images of a microcapsule have been successfully obtained with a wide X-ray energy range.

  10. Thermal, structural, and fabrication aspects of diamond windows for high power synchrotron x-ray beamlines

    SciTech Connect

    Khounsary, A.M. ); Phillips, W. )

    1992-01-01

    Recent advances in chemical vapor deposition (CVD) technology have made it possible to produce thin free-standing diamond foils that can be used as the window material in high heat load, synchrotron beamlines. Numerical simulations suggest that these windows can offer an attractive and at times the only altemative to beryllium windows for use in third generation x-ray synchrotron radiation beamlines. Utilization, design, and fabrication aspects of diamond windows for high heat load x-ray beamlines are discussed, as are the microstructure characteristics bearing on diamond's performance in this role. Analytic and numerical results are also presented to provide a basis for the design and testing of such windows.

  11. New micro-beam beamline at SPring-8, targeting at protein micro-crystallography

    SciTech Connect

    Hirata, Kunio; Ueno, Go; Nisawa, Atsushi; Kawano, Yoshiaki; Hikima, Takaaki; Tanaka, Takashi; Kitamura, Hideo; Yamamoto, Masaki; Shimizu, Nobutaka; Kumasaka, Takashi; Takeshita, Kunikazu; Ohashi, Haruhiko; Goto, Shunji

    2010-06-23

    A new protein micro-crystallography beamline BL32XU at SPring-8 is under construction and scheduled to start operation in 2010. The beamline is designed to provide the stabilized and brilliant micro-beam to collect high-quality data from micro-crystals. The beamline consists of a hybrid in-vacuum undulator, a liquid-nitrogen cooled double crystal monochromator, and K-B focusing mirrors with large magnification factor. Development of data acquisition system and end station consists of high-precision diffractometer, high-efficiency area detector, sample auto-changer etc. are also in progress.

  12. Characterization of the new NSLS infrared microspectroscopy beamline U10B

    SciTech Connect

    Carr, G.L.

    1999-07-19

    The first of several new infrared beamlines, built on a modified bending magnet port of the NSLS VUV ring, is now operational for mid-infrared microspectroscopy. The port simultaneously delivers 40 mrad by 40 mrad to two separate beamlines and spectrometer endstations designated U10A and U10B. The latter is equipped with a scanning infrared microspectrometer. The combination of this instrument and high brightness synchrotron radiation makes diffraction-limited microspectroscopy practical. This paper describes the beamline's performance and presents quantitative information on the diffraction-limited resolution.

  13. CHARACTERIZATION OF THE NEW NSLS INFARED MICROSPECTROSCOPY BEAMLINE U10B.

    SciTech Connect

    CARR,G.L.

    1999-07-19

    The first of several new infrared beamlines, built on a modified bending magnet port of the NSLS VUV ring, is now operational for mid-infrared microspectroscopy. The port simultaneously delivers 40 mrad by 40 mrad to two separate beamlines and spectrometer endstations designated U10A and U10B. The latter is equipped with a scanning infrared microspectrometer. The combination of this instrument and high brightness synchrotron radiation makes diffraction-limited microspectroscopy practical. This paper describes the beamline's performance and presents quantitative information on the diffraction-limited resolution.

  14. Beam-position monitors in the X-ray undulator beamline at PETRA.

    PubMed

    Hahn, U; Brefeld, W; Hesse, M; Schneider, J R; Schulte-Schrepping, H; Seebach, M; Werner, M

    1998-05-01

    At the 12 GeV storage ring PETRA, the first synchrotron radiation beamline uses a 4 m-long undulator. The beamline, with a length of 130 m between source and sample, delivers hard X-ray photons usable up to 300 keV. The photon beam has a total power of 7 kW. Combined with the high brilliance, the powerful beam is very critical for all beamline components. Copper, located at a distance of 26 m, hit by the full undulator beam, melts within 20 ms. Different monitors are described for stable, safe and reliable operation of beam and experiments.

  15. Imaging in real and reciprocal space at the Diamond beamline I13

    SciTech Connect

    Rau, C.; Wagner, U. H.; Vila-Comamala, J.; Bodey, A.; Parson, A.; García-Fernández, M.; Pešić, Z.; De Fanis, A.

    2016-01-28

    The Diamond Imaging and Coherence beamline I13 consists of two independent branchlines for imaging in real and reciprocal space. Different microscopies are available providing a range of spatial resolution from 5µm to potentially 5nm. The beamline operates in the energy range of 6-35keV covering different scientific areas such as biomedicine, materials science and geophysics. Several original devices have been developed at the beamline, such as the EXCALIBUR photon counting detector and the combined robot arms for coherent X-ray diffraction.

  16. Beamline stability measurements with a stretched wire system in the FFTB

    SciTech Connect

    Assmann, R.; Salsberg, C.; Montag, C.

    1996-09-01

    Beamline stability is of great importance for future linear colliders where tolerances generally are in the micron to sub-micron range. A stretched wire system in the sealed FFTB tunnel at SLAC was used to monitor beamline motion with a sub-micron resolution. In future linear colliders low frequency changes of the beamline alignment (< 0.1 Hz) lead to untolerable quasistatical misalignments and betatron oscillations. Since it requires time to correct those errors, it is very important to determine how often corrections are needed. The authors present the measurements, discuss the systematics of the stretched wire system and compare the observations with the ATL-model for ground motion.

  17. Characterization of γ-ray background at IMAT beamline of ISIS Spallation Neutron Source

    NASA Astrophysics Data System (ADS)

    Festa, G.; Andreani, C.; Arcidiacono, L.; Burca, G.; Kockelmann, W.; Minniti, T.; Senesi, R.

    2017-08-01

    The environmental γ -ray background on the IMAT beamline at ISIS Spallation Neutron Source, Target Station 2, is characterized via γ spectroscopy. The measurements include gamma exposure at the imaging detector position, along with the gamma background inside the beamline. Present results are discussed and compared with previous measurements recorded at INES and VESUVIO beamlines operating at Target Station 1. They provide new outcome for expanding and optimizing the PGAA experimental capability at the ISIS neutron source for the investigation of materials, engineering components and cultural heritage objects at the ISIS neutron source.

  18. Satellite Power Systems (SPS) concept definition study (Exhibit D). Volume 5: Systems engineering/integration research and technology

    NASA Astrophysics Data System (ADS)

    Hanley, G. M.

    1981-03-01

    Guidelines and ground rules followed in the development of requirements for the SPS are presented. Development planning objectives are specified in each of these areas, and evolutionary SPS program scenarios are described for the various concepts studied during the past one year contract. Program descriptions are presented as planning packages of technical tasks, and schedule phasing. Each package identifies the ground based technology effort that will facilitate SPS definitions, designs, development, and operations.

  19. Satellite Power Systems (SPS) concept definition study (Exhibit D). Volume 5: Systems engineering/integration research and technology

    NASA Technical Reports Server (NTRS)

    Hanley, G. M.

    1981-01-01

    Guidelines and ground rules followed in the development of requirements for the SPS are presented. Development planning objectives are specified in each of these areas, and evolutionary SPS program scenarios are described for the various concepts studied during the past one year contract. Program descriptions are presented as planning packages of technical tasks, and schedule phasing. Each package identifies the ground based technology effort that will facilitate SPS definitions, designs, development, and operations.

  20. Recent Major Improvements to the ALS Sector 5 MacromolecularCrystallography Beamlines

    SciTech Connect

    Morton, Simon A.; Glossinger, James; Smith-Baumann, Alexis; McKean, John P.; Trame, Christine; Dickert, Jeff; Rozales, Anthony; Dauz,Azer; Taylor, John; Zwart, Petrus; Duarte, Robert; Padmore, Howard; McDermott, Gerry; Adams, Paul

    2007-07-01

    Although the Advanced Light Source (ALS) was initially conceived primarily as a low energy (1.9GeV) 3rd generation source of VUV and soft x-ray radiation it was realized very early in the development of the facility that a multipole wiggler source coupled with high quality, (brightness preserving), optics would result in a beamline whose performance across the optimal energy range (5-15keV) for macromolecular crystallography (MX) would be comparable to, or even exceed, that of many existing crystallography beamlines at higher energy facilities. Hence, starting in 1996, a suite of three beamlines, branching off a single wiggler source, was constructed, which together formed the ALS Macromolecular Crystallography Facility. From the outset this facility was designed to cater equally to the needs of both academic and industrial users with a heavy emphasis placed on the development and introduction of high throughput crystallographic tools, techniques, and facilities--such as large area CCD detectors, robotic sample handling and automounting facilities, a service crystallography program, and a tightly integrated, centralized, and highly automated beamline control environment for users. This facility was immediately successful, with the primary Multiwavelength Anomalous Diffraction beamline (5.0.2) in particular rapidly becoming one of the foremost crystallographic facilities in the US--responsible for structures such as the 70S ribosome. This success in-turn triggered enormous growth of the ALS macromolecular crystallography community and spurred the development of five additional ALS MX beamlines all utilizing the newly developed superconducting bending magnets ('superbends') as sources. However in the years since the original Sector 5.0 beamlines were built the performance demands of macromolecular crystallography users have become ever more exacting; with growing emphasis placed on studying larger complexes, more difficult structures, weakly diffracting or smaller

  1. Honokiol induces proteasomal degradation of AML1-ETO oncoprotein via increasing ubiquitin conjugase UbcH8 expression in leukemia.

    PubMed

    Zhou, Bin; Li, Haiying; Xing, Chongyun; Ye, Haige; Feng, Jianhua; Wu, Jianbo; Lu, Zhongqiu; Fang, Jing; Gao, Shenmeng

    2017-03-15

    AML1-ETO is the most common oncoprotein leading to acute myeloid leukemia (AML), in which 5-year survival rate is only about 30%. However, currently there are no specific therapies for AML patients with AML1-ETO. Here, we report that AML1-ETO protein is rapidly degraded by Honokiol (HNK), a natural phenolic compound isolated from the plant Magnolia officinalis. HNK induced the degradation of AML1-ETO in a concentration- and time-dependent manner in leukemic cell lines and primary AML blasts with t(8;21) translocation. Mechanistically, HNK obviously increased the expression of UbcH8, an E2-conjugase for the degradation of AML1-ETO, through triggering accumulation of acetylated histones in the promoter region of UbcH8. Knockdown of UbcH8 by small hairpin RNAs (shRNAs) prevented HNK-induced degradation of AML-ETO, suggesting that UbcH8 plays a critical role in the degradation of AML1-ETO. HNK inhibited cell proliferation and induced apoptotic death without activation of caspase-3, which was reported to cleave and degrade AML1-ETO protein. Thus, HNK-induced degradation of AML1-ETO is independent of activation of caspase-3. Finally, HNK reduced the angiogenesis and migration in Kasumi-1-injected zebrafish, decreased xenograft tumor size in a xenograft leukemia mouse model, and prolonged the survival time in mouse C1498 AML model. Collectively, HNK might be a potential treatment for t(8;21) leukemia by targeting AML1-ETO oncoprotein. Copyright © 2016 Elsevier Inc. All rights reserved.

  2. A reduction of sucrose phosphate synthase (SPS) activity affects sucrose/starch ratio in leaves but does not inhibit normal plant growth in rice.

    PubMed

    Hashida, Yoichi; Hirose, Tatsuro; Okamura, Masaki; Hibara, Ken-Ichiro; Ohsugi, Ryu; Aoki, Naohiro

    2016-12-01

    Sucrose phosphate synthase (SPS) has been shown to mediate sucrose/starch ratio in plant leaves through studies of 'starch leaf' species that mainly accumulate starch in their leaves. However, the contribution of SPS to sucrose/starch ratio in rice leaves, which mainly accumulate sucrose (i.e., 'sugar leaf'), has not been confirmed due to inconsistencies in the results of previous studies. In this study, we analyzed mutant lines with reduced SPS activity, which were generated using Tos17 insertion, RNAi, and the CRISPR/Cas9 system. The knockdown and knockout mutants of OsSPS1 showed a 29-46% reduction in SPS activity in the leaves, but the carbohydrate content in the leaves and plant growth were not significantly different from those of wild-type plants. In a double knockout mutant of OsSPS1 and OsSPS11 (sps1/sps11), an 84% reduction in leaf SPS activity resulted in higher starch accumulation in the leaves than in the wild-type leaves. However, the sps1/sps11 plants grew normally, which is in contrast to the inhibited growth of SPS mutants of Arabidopsis thaliana, a typical starch leaf plant. These results suggest that SPS has a smaller effect on the sucrose/starch ratio in leaves and growth of rice than on starch leaf species. Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.

  3. Timely Closure of the Prospore Membrane Requires SPS1 and SPO77 in Saccharomyces cerevisiae

    PubMed Central

    Paulissen, Scott M.; Slubowski, Christian J.; Roesner, Joseph M.; Huang, Linda S.

    2016-01-01

    During sporulation in Saccharomyces cerevisiae, a double lipid bilayer called the prospore membrane is formed de novo, growing around each meiotic nucleus and ultimately closing to create four new cells within the mother cell. Here we show that SPS1, which encodes a kinase belonging to the germinal center kinase III family, is involved in prospore membrane development and is required for prospore membrane closure. We find that SPS1 genetically interacts with SPO77 and see that loss of either gene disrupts prospore membrane closure in a similar fashion. Specifically, cells lacking SPS1 and SPO77 produce hyperelongated prospore membranes from which the leading edge protein complex is not removed from the prospore membrane in a timely fashion. The SPS1/SPO77 pathway is required for the proper phosphorylation and stability of Ssp1, a member of the leading edge protein complex that is removed and degraded when the prospore membrane closes. Genetic dissection of prospore membrane closure finds SPS1 and SPO77 act in parallel to a previously described pathway of prospore membrane closure that involves AMA1, an activator of the meiotic anaphase promoting complex. PMID:27182947

  4. The sps Gene Products Affect the Germination, Hydrophobicity, and Protein Adsorption of Bacillus subtilis Spores

    PubMed Central

    Cangiano, Giuseppina; Sirec, Teja; Panarella, Cristina; Isticato, Rachele; Baccigalupi, Loredana; De Felice, Maurilio

    2014-01-01

    The multilayered surface of the Bacillus subtilis spore is composed of proteins and glycans. While over 70 different proteins have been identified as surface components, carbohydrates associated with the spore surface have not been characterized in detail yet. Bioinformatic data suggest that the 11 products of the sps operon are involved in the synthesis of polysaccharides present on the spore surface, but an experimental validation is available only for the four distal genes of the operon. Here, we report a transcriptional analysis of the sps operon and a functional study performed by constructing and analyzing two null mutants lacking either all or only the promoter-proximal gene of the operon. Our results show that both sps mutant spores apparently have normal coat and crust but have a small germination defect and are more hydrophobic than wild-type spores. We also show that spores lacking all Sps proteins are highly adhesive and form extensive clumps. In addition, sps mutant spores have an increased efficiency in adsorbing a heterologous enzyme, suggesting that hydrophobic force is a major determinant of spore adsorption and indicating that a deep understanding of the surface properties of the spore is essential for its full development as a surface display platform. PMID:25239894

  5. Multiwalled carbon nanotube monoliths prepared by spark plasma sintering (SPS) and their mechanical properties.

    PubMed

    Uo, Motohiro; Hasegawa, Tomoka; Akasaka, Tsukasa; Tanaka, Isao; Munekane, Fuminori; Omori, Mamoru; Kimura, Hisamichi; Nakatomi, Reiko; Soga, Kohei; Kogo, Yasuo; Watari, Fumio

    2009-01-01

    Three types of multiwalled carbon nanotube (MWCNT) monoliths without any binders were obtained by spark plasma sintering (SPS) treatment at 2000 degrees C under 80 MPa sintering pressure. Three MWCNTs with different diameters: thin (slashed circle20-30 nm, CNT Co., Ltd., Korea), thick (slashed circle100 nm, Nano Carbon Technologies Co., Ltd., Japan) and spherical thin (slashed circle20-30 nm, granulated diameter = 1-3 microm, Shimizu Corporation, Japan) were employed for SPS. SEM observation confirmed that these materials maintained the nanosized tube microstructure of raw CNT powder after SPS treatment. The densest monolith was prepared with the spherical MWCNTs. The mechanical properties of this material were estimated by the dynamic hardness test. The elastic modulus of the monolith did not depend on the difference of MWCNTs, but the hardness of spherical MWCNTs was higher than that of thick MWCNTs. The high density and hardness of the spherical MWCNTs were caused by the high packing density during the SPS process because of its spherical granulation. Thus, the spherical MWCNTs were most useful for the MWCNT monolith preparation with the SPS process and its application as a bone substitute material and a bone tissue engineering scaffold material was suggested.

  6. Functional analysis of sucrose phosphate synthase (SPS) and sucrose synthase (SS) in sugarcane (Saccharum) cultivars.

    PubMed

    Verma, A K; Upadhyay, S K; Verma, P C; Solomon, S; Singh, S B

    2011-03-01

    Sucrose phosphate synthase (SPS; EC 2.4.1.14) and sucrose synthase (SS; EC 2.4.1.13) are key enzymes in the synthesis and breakdown of sucrose in sugarcane. The activities of internodal SPS and SS, as well as transcript expression were determined using semi-quantitative RT-PCR at different developmental stages of high and low sucrose accumulating sugarcane cultivars. SPS activity and transcript expression was higher in mature internodes compared with immature internodes in all the studied cultivars. However, high sugar cultivars showed increased transcript expression and enzyme activity of SPS compared to low sugar cultivars at all developmental stages. SS activity was higher in immature internodes than in mature internodes in all cultivars; SS transcript expression showed a similar pattern. Our studies demonstrate that SPS activity was positively correlated with sucrose and negatively correlated with hexose sugars. However, SS activity was negatively correlated with sucrose and positively correlated with hexose sugars. The present study opens the possibility for improvement of sugarcane cultivars by increasing expression of the respective enzymes using transgene technology. © 2010 German Botanical Society and The Royal Botanical Society of the Netherlands.

  7. Activation of SPS from darkened spinach leaves by an endogenous protein phosphatase

    SciTech Connect

    Huber, S.C.; Huber, J.L. )

    1990-05-01

    Sucrose-phosphate synthase from darkened spinach leaves has a low activation state but can undergo a time-dependent activation in desalted leaf extracts that is inhibited by Pi, molybdate, okadaic acid and vanadate, but stimulated by fluoride. SPS labeled in vivo with ({sup 32}P)Pi in excised leaves in the dark loses incorporated {sup 32}P with time when extracts are incubated at 25{degree}C. This loss is largely prevented by vanadate, suggesting that an endogenous protein phosphatase can use SPS as substrate. Changes in phosphorylation state are closely paralleled by changes in SPS activation state. The spontaneous activation achieved in the extracts can be reversed by addition of 2 mM MgATP. Feeding okadaic acid to darkened leaves prevents light activation of SPS suggesting that the endogenous protein phosphatase is similar to the type-1 enzyme of animal tissues. Overall, the results are consistent with the notion that light activation of SPS involves dephosphorylation of inhibitory phosphorylation site(s). Regulation of the protein phosphatase by Pi may be of physiological significance.

  8. A Low Power Density Rectenna for SPS Application

    NASA Astrophysics Data System (ADS)

    Fujino, Yoshiyuki

    2002-01-01

    present launch technology. Due to the satellites low power and small antenna, the power flux density reaching the earth's surface is only 1 W/m2. This is probably insufficient for practical applications, so we investigated the minimum density required for a rectenna to operate. because the input power of the rectifying circuits is lower. We thus developed a rectenna with a larger aperture area that can operate satisfactorily when the power flux density is low because the input power to the rectifying circuits is not reduced. antenna array. Although constructing an antenna array is relatively easy, the substrate material is costly. We thus took the second approach--using a rectenna with a parabolic antenna. power transmission frequency was 5.8 GHz. We designed a center-feed parabolic antenna with a 60-cm diameter using a circular patch antenna as the primary feed. The gain and aperture efficiency were 29 dBi and 62 %, respectively. The 3-dB beam width was 7 degrees. Rectifying circuits were constructed on the reverse side of the patch antenna, and its efficiency was about 75 % at an input power of 300 mW and a load resistance of 300 ohms. Microwave power transmission experiments in an anechoic chamber showed that the efficiency of a rectenna with a parabolic reflector was 50 %. increase the amount of time to receive data from the satellite. Therefore, we changed the length of the two orthogonal directions of the reflector.We propose rectangular reflector rectenna that can arrange without clearance on the whole ground rectenna site. We calculated the directivity of this antenna by using the physical optics method. The major and minor axis length of antenna was 85 x 43 cm, and its 3-dB beam width was 4 and 8 degrees, respectively, and the gain was 30 dBi.The degradation in the aperture efficiency compared to the circular parabolic antenna was about 12 %. power region of its normal site in the SPS. The transmission using microwave power was successful even in a region

  9. The electron spectro-microscopy beamline at National Synchrotron Light Source II: A wide photon energy range, micro-focusing beamline for photoelectron spectro-microscopies

    SciTech Connect

    Reininger, R.; Hulbert, S. L.; Chubar, O.; Vescovo, E.; Johnson, P. D.; Valla, T.; Sadowski, J. T.; Starr, D. E.

    2012-02-15

    A comprehensive optical design for a high-resolution, high-flux, wide-energy range, micro-focused beamline working in the vacuum ultraviolet and soft x-ray photon energy range is proposed. The beamline is to provide monochromatic radiation to three photoelectron microscopes: a full-field x-ray photoelectron emission microscope and two scanning instruments, one dedicated to angle resolved photoemission spectroscopy ({mu}-ARPES) and one for ambient pressure x-ray photoelectron spectroscopy and scanning photoelectron microscopy (AP-XPS/SPEM). Microfocusing is achieved with state of the art elliptical cylinders, obtaining a spot size of 1 {mu}m for ARPES and 0.5 {mu}m for AP-XPS/SPEM. A detailed ray tracing analysis quantitatively evaluates the overall beamline performances.

  10. New Soft X-ray Beamline (BL10) at the SAGA Light Source

    SciTech Connect

    Yoshimura, D.; Setoyama, H.; Okajima, T.

    2010-06-23

    A new soft X-ray beamline (BL10) at the SAGA Light Source (SAGA-LS) was constructed at the end of 2008. Commissioning of this new beamline started at the beginning of 2009. Synchrotron radiation from a variably polarizing undulator (APPLE-II) can be used in this beamline. The obtained light is monochromatized by a varied-line-spacing plane grating monochromator with the variable included angle mechanism. Its designed resolving power and photon flux are 3,000-10,000 and 10{sup 12}-10{sup 9} photons/s at 300 mA, respectively. The performance test results were generally satisfactory. An overview of the optical design of the beamline and the current status of commissioning are reported.

  11. Safety Analysis Report: X17B2 beamline Synchrotron Medical Research Facility

    SciTech Connect

    Gmuer, N.F.; Thomlinson, W.

    1990-02-01

    This report contains a safety analysis for the X17B2 beamline synchrotron medical research facility. Health hazards, risk assessment and building systems are discussed. Reference is made to transvenous coronary angiography. (LSP)

  12. High-throughput Toroidal Grating Beamline for Photoelectron Spectroscopy at CAMD

    NASA Astrophysics Data System (ADS)

    Kizilkaya, O.; Jiles, R. W.; Patterson, M. C.; Thibodeaux, C. A.; Poliakoff, E. D.; Sprunger, P. T.; Kurtz, R. L.; Morikawa, E.

    2014-03-01

    A 5 meter toroidal grating (5m-TGM) beamline has been commissioned to deliver 28 mrad of bending magnet radiation to an ultrahigh vacuum endstation chamber to facilitate angle resolved photoelectron spectroscopy. The 5m-TGM beamline is equipped with Au-coated gratings with 300, 600 and 1200 lines/mm providing monochromatized synchrotron radiation in the energy ranges 25-70 eV, 50-120 eV and 100-240 eV, respectively. The beamline delivers excellent flux (~1014-1017 photons/sec/100mA) and a combined energy resolution of 189 meV for the beamline (at 1.0 mm slit opening) and HA-50 hemispherical analyzer was obtained at the Fermi level of polycrystalline gold crystal. Our preliminary photoelectron spectroscopy results of phenol adsorption on TiO2 (110) surface reveals the metal ion (Ti) oxidation.

  13. Time Resolved Detectors and Measurements for Accelerators and Beamlines at the Australian Synchrotron

    NASA Astrophysics Data System (ADS)

    Boland, M. J.; Rassool, R. P.; LeBlanc, G. S.; Peake, D. J.; Sobott, B. A.; Lee, V.; Schubert, A.; Kirby, N.

    2010-06-01

    Time resolved experiments require precision timing equipment and careful configuration of the machine and the beamline. The Australian Synchrotron has a state of the art timing system that allows flexible, real-time control of the machine and beamline timing parameters to target specific electron bunches. Results from a proof-of-principle measurement with a pulsed laser and a streak camera on the optical diagnostic beamline will be presented. The timing system was also used to fast trigger the PILATUS detector on an x-ray beamline to measure the fill pattern dependent effects of the detector. PILATUS was able to coarsely measure the fill pattern in the storage ring which implies that fill pattern intensity variations need to be corrected for when using the detector in this mode.

  14. Time Resolved Detectors and Measurements for Accelerators and Beamlines at the Australian Synchrotron

    SciTech Connect

    Boland, M. J.; Rassool, R. P.; Peake, D. J.; Sobott, B. A.; Lee, V.; Schubert, A.; LeBlanc, G. S.; Kirby, N.

    2010-06-23

    Time resolved experiments require precision timing equipment and careful configuration of the machine and the beamline. The Australian Synchrotron has a state of the art timing system that allows flexible, real-time control of the machine and beamline timing parameters to target specific electron bunches. Results from a proof-of-principle measurement with a pulsed laser and a streak camera on the optical diagnostic beamline will be presented. The timing system was also used to fast trigger the PILATUS detector on an x-ray beamline to measure the fill pattern dependent effects of the detector. PILATUS was able to coarsely measure the fill pattern in the storage ring which implies that fill pattern intensity variations need to be corrected for when using the detector in this mode.

  15. Wiggler-base Hard X-ray Spectroscopy Beamline at CLS

    SciTech Connect

    Jiang, D. T.; Chen, N.; Sheng, W.

    2007-01-19

    The CLS 06ID-1 Hard X-ray Micro-Analysis Beamline (HXMA) is a general purpose hard X-ray spectroscopy beamline (5 to 40 keV) designed to serve users in XAFS, diffraction and microprobe communities. The beamline uses the synchrotron radiation from a superconducting wiggler. The primary beamline optics include a 1.2 m water-cooled silicon collimating mirror (separate Rh and Pt coating stripes), a liquid nitrogen cooled double crystal monochromator (Kohzu CMJ-1) housing two crystal pairs (Si 111 and 220), and a 1.15 m long water-cooled silicon toroidal focusing mirror (separate Rh and Pt coating stripes). All mirrors are equipped with dynamical meridian benders. The experimental hutch hosts three experimental setups for XAFS, diffraction and microprobe, respectively. Primary design considerations and some commissioning results are discussed.

  16. H10:. A materials and high temperature beamline at LURE/DCI

    NASA Astrophysics Data System (ADS)

    Gailhanou, M.; Dubuisson, J. M.; Ribbens, M.; Roussier, L.; Bétaille, D.; Créoff, C.; Lemonnier, M.; Denoyer, J.; Bouillot, C.; Jucha, A.; Lena, A.; Idir, M.; Bessière, M.; Thiaudière, D.; Hennet, L.; Landron, C.; Coutures, J. P.

    2001-07-01

    A new beamline dedicated to materials and high temperature studies, combining X-ray scattering and X-ray absorption measurements, is now in operation at LURE/DCI. The source is a bending magnet and the energy range of the beamline is 4-20 keV. Here we describe the beamline and, since a part of it (mainly the optical part) should move to the 3rd generation SOLEIL storage ring, we also present the results of a ray-tracing analysis taking into account the characteristics of the two sources (DCI and SOLEIL). Examples of experiments achieved on the beamline are shown, in particular scattering experiments on liquid Al 2O 3 at 2250°C and absorption spectroscopy at the Ca K edge.

  17. New soft X-ray beamline BL07LSU at SPring-8

    PubMed Central

    Yamamoto, Susumu; Senba, Yasunori; Tanaka, Takashi; Ohashi, Haruhiko; Hirono, Toko; Kimura, Hiroaki; Fujisawa, Masami; Miyawaki, Jun; Harasawa, Ayumi; Seike, Takamitsu; Takahashi, Sunao; Nariyama, Nobuteru; Matsushita, Tomohiro; Takeuchi, Masao; Ohata, Toru; Furukawa, Yukito; Takeshita, Kunikazu; Goto, Shunji; Harada, Yoshihisa; Shin, Shik; Kitamura, Hideo; Kakizaki, Akito; Oshima, Masaharu; Matsuda, Iwao

    2014-01-01

    A new soft X-ray beamline, BL07LSU, has been constructed at SPring-8 to perform advanced soft X-ray spectroscopy for materials science. The beamline is designed to achieve high energy resolution (E/ΔE> 10000) and high photon flux [>1012 photons s−1 (0.01% bandwidth)−1] in the photon energy range 250–2000 eV with controllable polarization. To realise this state-of-the-art performance, a novel segmented cross undulator was developed and adopted as a light source. The details of the undulator light source and beamline monochromator design are described. The achieved performance of the beamline, such as the photon flux, energy resolution and the state of polarization, is reported. PMID:24562556

  18. I18--the microfocus spectroscopy beamline at the Diamond Light Source.

    PubMed

    Mosselmans, J Frederick W; Quinn, Paul D; Dent, Andrew J; Cavill, Stuart A; Moreno, Sofia Diaz; Peach, Andrew; Leicester, Peter J; Keylock, Stephen J; Gregory, Simon R; Atkinson, Kirk D; Rosell, Josep Roque

    2009-11-01

    The design and performance of the microfocus spectroscopy beamline at the Diamond Light Source are described. The beamline is based on a 27 mm-period undulator to give an operable energy range between 2 and 20.7 keV, enabling it to cover the K-edges of the elements from P to Mo and the L(3)-edges from Sr to Pu. Micro-X-ray fluorescence, micro-EXAFS and micro-X-ray diffraction have all been achieved on the beamline with a spot size of approximately 3 microm. The principal optical elements of the beamline consist of a toroid mirror, a liquid-nitrogen-cooled double-crystal monochromator and a pair of bimorph Kirkpatrick-Baez mirrors. The performance of the optics is compared with theoretical values and a few of the early experimental results are summarized.

  19. I19, the small-molecule single-crystal diffraction beamline at Diamond Light Source.

    PubMed

    Nowell, Harriott; Barnett, Sarah A; Christensen, Kirsten E; Teat, Simon J; Allan, David R

    2012-05-01

    The dedicated small-molecule single-crystal X-ray diffraction beamline (I19) at Diamond Light Source has been operational and supporting users for over three years. I19 is a high-flux tunable-wavelength beamline and its key details are described in this article. Much of the work performed on the beamline involves structure determination from small and weakly diffracting crystals. Other experiments that have been supported to date include structural studies at high pressure, studies of metastable species, variable-temperature crystallography, studies involving gas exchange in porous materials and structural characterizations that require analysis of the diffuse scattering between Bragg reflections. A range of sample environments to facilitate crystallographic studies under non-ambient conditions are available as well as a number of options for automation. An indication of the scope of the science carried out on the beamline is provided by the range of highlights selected for this paper.

  20. Development of soft X-ray polarized light beamline on Indus-2 synchrotron radiation source

    SciTech Connect

    Phase, D. M. Gupta, Mukul Potdar, S. Behera, L. Sah, R. Gupta, Ajay

    2014-04-24

    This article describes the development of a soft x-ray beamline on a bending magnet source of Indus-2 storage ring (2.5 GeV) and some preliminary results of x-ray absorption spectroscopy (XAS) measurements using the same. The beamline layout is based on a spherical grating monochromator. The beamline is able to accept synchrotron radiation from the bending magnet port BL-1 of the Indus-2 ring with a wide solid angle. The large horizontal and vertical angular acceptance contributes to high photon flux and selective polarization respectively. The complete beamline is tested for ultrahigh vacuum (UHV) ∼ 10{sup −10} mbar. First absorption spectrum was obtained on HOPG graphite foil. Our performance test indicates that modest resolving power has been achieved with adequate photon flux to carry out various absorption experiments.

  1. Preadjustment of small elliptical bender mirrors for an x-ray beamline

    NASA Astrophysics Data System (ADS)

    Irick, Steven C.

    1995-06-01

    The long trace profiler (LTP) has been used to assure the quality of x-ray beamline mirrors with fixed radii of curvature after they have arrived from the manufacturer and before they are permanently set in the beamline. In the case of some adjustable radius mirrors, the adjustment mechanism may require setting outside of the beamline. The bending mechanism often bends the mirror into a tangential cylinder, which is difficult to measure by interferometric methods. Measuring medium- to long-radius cylinders is a routine task for the LTP. Thus, a bendable (adjustable radius) mirror may be adjusted in the metrology laboratory before the mirror is placed in the beamline. This paper describes the method of adjustment and surface quality assessment for bendable, adjustable radius mirrors in general, and shows results for a small mirror that is bent into an elliptical cylinder.

  2. Transverse to longitudinal emittance exchange beamline at the A0 photoinjector.

    SciTech Connect

    Fililler, R. P.; Edwards, D. A.; Koeth, T.; Harkay, K. C.; Kim, K.-J.; Edwards, H. T.; Accelerator Systems Division; Fermilab; Rutgers Univ.

    2007-08-01

    The FNAL A0 Photoinjector is being reconfigured to test the principal of transverse to longitudinal emittance exchange as proposed by Cornacchia and Emma, Kim and Sessler, and others. The ability to perform such an exchange could have major advantages to FELs by reducing the transverse emittance. Several schemes to carry out the exchange are possible and will be reported separately. At the Fermilab A0 Photoinjector we are constructing a beamline to demonstrate this transverse to longitudinal emittance exchange. This beamline will consist of a dogleg, a TM{sub 110} 5 cell copper cavity, and another dogleg. The beamline is designed to reuse the bunch compressor dipoles of the photoinjector, along with some existing diagnostics. Beamline layout and simulations are presented. Emittance dilution effects are also discussed.

  3. High-throughput Toroidal Grating Beamline for Photoelectron Spectroscopy at CAMD

    PubMed Central

    Kizilkaya, O; Jiles, R W; Patterson, M C; Thibodeaux, C A; Poliakoff, E D; Sprunger, P T; Kurtz, R L; Morikawa, E

    2016-01-01

    A 5 meter toroidal grating (5m-TGM) beamline has been commissioned to deliver 28 mrad of bending magnet radiation to an ultrahigh vacuum endstation chamber to facilitate angle resolved photoelectron spectroscopy. The 5m-TGM beamline is equipped with Au-coated gratings with 300, 600 and 1200 lines/mm providing monochromatized synchrotron radiation in the energy ranges 25-70 eV, 50–120 eV and 100–240 eV, respectively. The beamline delivers excellent flux (~1014-1017 photons/sec/100mA) and a combined energy resolution of 189 meV for the beamline (at 1.0 mm slit opening) and HA-50 hemispherical analyzer was obtained at the Fermi level of polycrystalline gold crystal. Our preliminary photoelectron spectroscopy results of phenol adsorption on TiO2 (110) surface reveals the metal ion (Ti) oxidation. PMID:27134636

  4. The EIS-TIMER beamline: transient grating spectroscopy at FERMI (Conference Presentation)

    NASA Astrophysics Data System (ADS)

    Svetina, Cristian

    2016-09-01

    FERMI, the Italian Free Electron Laser user facility, provides VUV/soft x-ray photons pulses with unprecedented high brilliance and coherence. The unique design of EIS-TIMER is conceived to exploit such kind of non-linear coherent experiments to probe collective vibrational and electronic properties of matter at the nanoscale. After the proof of principle experiment successfully carried out at the DiProI beamline employing a simplified and compact setup (mini-TIMER), the EIS-TIMER beamline has been installed and commissioned. The beamlines employs 24 mirrors and three photon beams in order to create a wide set of transient grating able to reach Q vectors so far impossible to probe. In the presentation the scientific case, the commissioning results as well as the future development of the beamline will be shown. The future project nano-TIMER will be described in detail with particular attention to it's unique optical scheme mainly composed by diffraction gratings.

  5. Aromaticity, optical properties and zero field splitting of homo- and hetero-bimetallic (C8H8)M(μ2-,η8═C8H8)M(C8H8) where M = Ti, Zr, Th Complexes.

    PubMed

    Páez-Hernández, Dayán; Arratia-Pérez, Ramiro

    2012-07-19

    This work presents a relativistic calculation of electron delocalization, optical properties, and zero field splitting in a group of molecules with the structure (C(8)H(8))M(μ(2)-,η(8)═C(8)H(8))M(C(8)H(8)), where M = Ti, Zr and Th. Additionally we also studied the heterobimetallic combinations (Ti-Th and Zr-Th). The molecular properties are discussed based on their electronic structure and the influence of the electron mobility in metal-metal communication. Nucleus independent chemical shift (NICS) was determined via the gauge-including-atomic-orbital (GIAO) method with the OPBE functional. The time-dependent density functional theory (TDDFT) was employed to calculate excitation energies, and the electronic transitions over 500 nm are presented with the objective to analyze the transition metal role as an antenna effect in the absorption band in the near-IR region. Finally the ZFS was calculated using Pederson-Khana and coupled perturbed DFT approaches implemented in the ORCA code. The contributions to spin-spin coupling (SS) and spin-orbit coupling (SOC) were analyzed, and the spin-density over the metal centers is discussed employing our scheme of metal-metal communication. Our aim is to determine the influence of the electronic structure over the optical and magnetic properties in a group of model compounds to understand the transition metals effect over these properties.

  6. A modified post damping ring bunch compressor beamline for the TESLA linear collider

    SciTech Connect

    Philippe R.-G. Piot; Winfried Decking

    2004-03-23

    We propose a modified bunch compressor beamline, downstream of the damping ring, for the TESLA linear collider. This modified beamline uses a third harmonic radio-frequency section based on the 3.9 GHz superconducting cavity under development at Fermilab. In our design the beam deceleration is about {approx}50 MeV instead of {approx}450 MeV in the original design proposed.

  7. First commissioning results for the elliptically polarizing undulator beamline at the Advanced Light Source

    NASA Astrophysics Data System (ADS)

    Young, A. T.; Feng, J.; Arenholz, E.; Padmore, H. A.; Henderson, T.; Marks, S.; Hoyer, E.; Schlueter, R.; Kortright, J. B.; Martynov, V.; Steier, C.; Portmann, G.

    2001-07-01

    A new facility at the Advanced Light Source, Lawrence Berkeley National Laboratory, for high resolution magnetic spectroscopy is described. Beamline 4.0.2 has an elliptically polarizing undulator (EPU) and a high resolution monochromator, covering the energy range from 90 to 1800 eV. In this paper, we present the first commissioning results from this beamline, including measurements of the spectral resolution, photon flux and polarization of the x-rays.

  8. Fundamental neutron physics beamline at the spallation neutron source at ORNL

    DOE PAGES

    Fomin, N.; Greene, G. L.; Allen, R. R.; ...

    2014-11-04

    In this paper, we describe the Fundamental Neutron Physics Beamline (FnPB) facility located at the Spallation Neutron Source at Oak Ridge National Laboratory. The FnPB was designed for the conduct of experiments that investigate scientific issues in nuclear physics, particle physics, astrophysics and cosmology using a pulsed slow neutron beam. Finally, we present a detailed description of the design philosophy, beamline components, and measured fluxes of the polychromatic and monochromatic beams.

  9. Optical design of the ARAMIS-beamlines at SwissFEL

    SciTech Connect

    Follath, R.; Flechsig, U.; Milne, C.; Szlachetko, J.; Ingold, G.; Patterson, B.; Patthey, L.; Abela, R.

    2016-07-27

    SwissFEL is a free electron laser facility for hard and soft X-rays at the Paul Scherrer Institut in Switzerland. The first hard X-ray FEL named ARAMIS will deliver photons in the wavelength range from 1 Å to 7 Å in up to three beamlines alternatively. The beamlines are equipped with crystal monochromators, cover the full wavelength range and offer a variety of operational modes.

  10. The Low Density Matter (LDM) beamline at FERMI: optical layout and first commissioning

    PubMed Central

    Svetina, Cristian; Grazioli, Cesare; Mahne, Nicola; Raimondi, Lorenzo; Fava, Claudio; Zangrando, Marco; Gerusina, Simone; Alagia, Michele; Avaldi, Lorenzo; Cautero, Giuseppe; de Simone, Monica; Devetta, Michele; Di Fraia, Michele; Drabbels, Marcel; Feyer, Vitaliy; Finetti, Paola; Katzy, Raphael; Kivimäki, Antti; Lyamayev, Viktor; Mazza, Tommaso; Moise, Angelica; Möller, Thomas; O’Keeffe, Patrick; Ovcharenko, Yevheniy; Piseri, Paolo; Plekan, Oksana; Prince, Kevin C.; Sergo, Rudi; Stienkemeier, Frank; Stranges, Stefano; Coreno, Marcello; Callegari, Carlo

    2015-01-01

    The Low Density Matter (LDM) beamline has been built as part of the FERMI free-electron laser (FEL) facility to serve the atomic, molecular and cluster physics community. After the commissioning phase, it received the first external users at the end of 2012. The design and characterization of the LDM photon transport system is described, detailing the optical components of the beamline. PMID:25931066

  11. Satellite Power Systems (SPS) concept definition study. Volume 2, part 2: System engineering. [cost and programmatics

    NASA Technical Reports Server (NTRS)

    Hanley, G. M.

    1980-01-01

    The latest technical and programmatic developments are considered as well as expansions of the Rockwell SPS cost model covering each phase of the program through the year 2030. Comparative cost/economic analyses cover elements of the satellite, construction system, space transportation vehicles and operations, and the ground receiving station. System plans to define time phased costs and planning requirements that support major milestones through the year 2000. A special analysis is included on natural resources required to build the SPS reference configuration. An appendix contains the SPS Work Breakdown Structure and dictionary along with detail cost data sheet on each system and main element of the program. Over 200 line items address DDT&E, theoretical first unit, investment cost per satellite, and operations charges for replacement capital and normal operations and maintenance costs.

  12. Energy requirements of the switchable polarity solvent forward osmosis (SPS-FO) water purification process

    SciTech Connect

    Wendt, Daniel S.; Orme, Christopher J.; Mines, Gregory L.; Wilson, Aaron D.

    2015-08-01

    A model was developed to estimate the process energy requirements of a switchable polarity solvent forward osmosis (SPS FO) system for water purification from aqueous NaCl feed solution concentrations ranging from 0.5 to 4.0 molal at an operational scale of 480 m3/day (feed stream). The model indicates recovering approximately 90% of the water from a feed solution with NaCl concentration similar to seawater using SPS FO would have total equivalent energy requirements between 2.4 and 4.3 kWh per m3 of purified water product. The process is predicted to be competitive with current costs for disposal/treatment of produced water from oil and gas drilling operations. As a result, once scaled up the SPS FO process may be a thermally driven desalination process that can compete with the cost of seawater reverse osmosis.

  13. Energy requirements of the switchable polarity solvent forward osmosis (SPS-FO) water purification process

    DOE PAGES

    Wendt, Daniel S.; Orme, Christopher J.; Mines, Gregory L.; ...

    2015-08-01

    A model was developed to estimate the process energy requirements of a switchable polarity solvent forward osmosis (SPS FO) system for water purification from aqueous NaCl feed solution concentrations ranging from 0.5 to 4.0 molal at an operational scale of 480 m3/day (feed stream). The model indicates recovering approximately 90% of the water from a feed solution with NaCl concentration similar to seawater using SPS FO would have total equivalent energy requirements between 2.4 and 4.3 kWh per m3 of purified water product. The process is predicted to be competitive with current costs for disposal/treatment of produced water from oilmore » and gas drilling operations. As a result, once scaled up the SPS FO process may be a thermally driven desalination process that can compete with the cost of seawater reverse osmosis.« less

  14. Satellite Power Systems (SPS) concept definition study. Volume 2, part 2: System engineering

    NASA Astrophysics Data System (ADS)

    Hanley, G. M.

    1980-09-01

    The latest technical and programmatic developments are considered as well as expansions of the Rockwell SPS cost model covering each phase of the program through the year 2030. Comparative cost/economic analyses cover elements of the satellite, construction system, space transportation vehicles and operations, and the ground receiving station. System plans to define time phased costs and planning requirements that support major milestones through the year 2000. A special analysis is included on natural resources required to build the SPS reference configuration. An appendix contains the SPS Work Breakdown Structure and dictionary along with detail cost data sheet on each system and main element of the program. Over 200 line items address DDT&E, theoretical first unit, investment cost per satellite, and operations charges for replacement capital and normal operations and maintenance costs.

  15. Operation Program for the Spatially Phase-Shifted Digital Speckle Pattern Interferometer - SPS-DSPI

    NASA Technical Reports Server (NTRS)

    Blake, Peter N.; Jones, Joycelyn T.; Hostetter, Carl F.; Greenfield, Perry; Miller, Todd

    2010-01-01

    SPS-DSPI software has been revised so that Goddard optical engineers can operate the instrument, instead of data programmers. The user interface has been improved to view the data collected by the SPS-DSPI, with a real-time mode and a play-back mode. The SPS-DSPI has been developed by NASA/GSFC to measure the temperature distortions of the primary-mirror backplane structure for the James Webb Space Telescope. It requires a team of computer specialists to run successfully, because, at the time of this reporting, it just finished the prototype stage. This software improvement will transition the instrument to become available for use by many programs that measure distortion

  16. Design of the Large Acceptance Muon Beamline at J-PARC

    NASA Astrophysics Data System (ADS)

    Nakahara, K.; Miyake, Y.; Shimomura, K.; Strasser, P.; Nishiyama, K.; Kawamura, N.; Fujimori, H.; Makimura, S.; Koda, A.; Nagamine, K.; Ogitsu, T.; Yamamoto, A.; Adachi, T.; Sasaki, K.; Tanaka, K.; Kimura, N.; Makida, Y.; Ajima, Y.; Ishida, K.; Matsuda, Y.

    2008-02-01

    The Materials and Life Science Facility (MLF) is currently under construction at J-PARC in Tokai, Japan. The muon section of the facility will house the muon production target and four secondary beamlines used to transport the muons into two experimental halls. One of the beamlines is a large acceptance beamline (the so called Super Omega Muon beamline) which, when completed, will produce the largest intensity pulse muon beam in the world. The expected rate of surface muons for this beamline is 5×108μ+/s, and a cloud muon rate of 107μ-/s. The extracted muons will be used for projects involving the production of ultra-slow muons as well as for muon-catalyzed fusion. The beamline consists of the normal-conducting capture solenoids, the superconducting curved transport solenoids, and the Dai Omega-type axial focusing magnet. Currently, the capture and transport solenoids are under design, with the former in its final stages and the latter being finalized for construction of test coils. The design of the Dai Omega-type axial focusing magnet is under consideration with particular emphasis on its compatibility with the transport solenoids.

  17. MxCuBE: a synchrotron beamline control environment customized for macromolecular crystallography experiments

    PubMed Central

    Gabadinho, José; Beteva, Antonia; Guijarro, Matias; Rey-Bakaikoa, Vicente; Spruce, Darren; Bowler, Matthew W.; Brockhauser, Sandor; Flot, David; Gordon, Elspeth J.; Hall, David R.; Lavault, Bernard; McCarthy, Andrew A.; McCarthy, Joanne; Mitchell, Edward; Monaco, Stéphanie; Mueller-Dieckmann, Christoph; Nurizzo, Didier; Ravelli, Raimond B. G.; Thibault, Xavier; Walsh, Martin A.; Leonard, Gordon A.; McSweeney, Sean M.

    2010-01-01

    The design and features of a beamline control software system for macromolecular crystallography (MX) experiments developed at the European Synchrotron Radiation Facility (ESRF) are described. This system, MxCuBE, allows users to easily and simply interact with beamline hardware components and provides automated routines for common tasks in the operation of a synchrotron beamline dedicated to experiments in MX. Additional functionality is provided through intuitive interfaces that enable the assessment of the diffraction characteristics of samples, experiment planning, automatic data collection and the on-line collection and analysis of X-ray emission spectra. The software can be run in a tandem client-server mode that allows for remote control and relevant experimental parameters and results are automatically logged in a relational database, ISPyB. MxCuBE is modular, flexible and extensible and is currently deployed on eight macromolecular crystallography beamlines at the ESRF. Additionally, the software is installed at MAX-lab beamline I911-3 and at BESSY beamline BL14.1. PMID:20724792

  18. MxCuBE: a synchrotron beamline control environment customized for macromolecular crystallography experiments.

    PubMed

    Gabadinho, José; Beteva, Antonia; Guijarro, Matias; Rey-Bakaikoa, Vicente; Spruce, Darren; Bowler, Matthew W; Brockhauser, Sandor; Flot, David; Gordon, Elspeth J; Hall, David R; Lavault, Bernard; McCarthy, Andrew A; McCarthy, Joanne; Mitchell, Edward; Monaco, Stéphanie; Mueller-Dieckmann, Christoph; Nurizzo, Didier; Ravelli, Raimond B G; Thibault, Xavier; Walsh, Martin A; Leonard, Gordon A; McSweeney, Sean M

    2010-09-01

    The design and features of a beamline control software system for macromolecular crystallography (MX) experiments developed at the European Synchrotron Radiation Facility (ESRF) are described. This system, MxCuBE, allows users to easily and simply interact with beamline hardware components and provides automated routines for common tasks in the operation of a synchrotron beamline dedicated to experiments in MX. Additional functionality is provided through intuitive interfaces that enable the assessment of the diffraction characteristics of samples, experiment planning, automatic data collection and the on-line collection and analysis of X-ray emission spectra. The software can be run in a tandem client-server mode that allows for remote control and relevant experimental parameters and results are automatically logged in a relational database, ISPyB. MxCuBE is modular, flexible and extensible and is currently deployed on eight macromolecular crystallography beamlines at the ESRF. Additionally, the software is installed at MAX-lab beamline I911-3 and at BESSY beamline BL14.1.

  19. Performance calculations of the X-ray powder diffraction beamline at NSLS-II.

    PubMed

    Shi, Xianbo; Ghose, Sanjit; Dooryhee, Eric

    2013-03-01

    The X-ray Powder Diffraction (XPD) beamline at the National Synchrotron Light Source II is a multi-purpose high-energy X-ray diffraction beamline with high throughput and high resolution. The beamline uses a sagittally bent double-Laue crystal monochromator to provide X-rays over a large energy range (30-70 keV). In this paper the optical design and the calculated performance of the XPD beamline are presented. The damping wiggler source is simulated by the SRW code and a filter system is designed to optimize the photon flux as well as to reduce the heat load on the first optics. The final beamline performance under two operation modes is simulated using the SHADOW program. For the first time a multi-lamellar model is introduced and implemented in the ray tracing of the bent Laue crystal monochromator. The optimization and the optical properties of the vertical focusing mirror are also discussed. Finally, the instrumental resolution function of the XPD beamline is described in an analytical method.

  20. Implementation of remote monitoring and diffraction evaluation systems at the Photon Factory macromolecular crystallography beamlines

    PubMed Central

    Yamada, Yusuke; pHonda, Nobuo; Matsugaki, Naohiro; Igarashi, Noriyuki; Hiraki, Masahiko; Wakatsuki, Soichi

    2008-01-01

    Owing to recent advances in high-throughput technology in macromolecular crystallography beamlines, such as high-brilliant X-ray sources, high-speed readout detectors and robotics, the number of samples that can be examined in a single visit to the beamline has increased dramatically. In order to make these experiments more efficient, two functions, remote monitoring and diffraction image evaluation, have been implemented in the macromolecular crystallography beamlines at the Photon Factory (PF). Remote monitoring allows scientists to participate in the experiment by watching from their laboratories, without having to come to the beamline. Diffraction image evaluation makes experiments easier, especially when using the sample exchange robot. To implement these two functions, two independent clients have been developed that work specifically for remote monitoring and diffraction image evaluation. In the macromolecular crystallography beamlines at PF, beamline control is performed using STARS (simple transmission and retrieval system). The system adopts a client–server style in which client programs communicate with each other through a server process using the STARS protocol. This is an advantage of the extension of the system; implementation of these new functions required few modifications of the existing system. PMID:18421163

  1. Mini-beam modes on standard MX beamline BL17U at SSRF

    NASA Astrophysics Data System (ADS)

    Wang, Qisheng; Yu, Feng; Cui, Ying; Zhang, Kunhao; Pan, Qiangyan; Zhong, Changyou; Liu, Ke; Zhou, Huan; Sun, Bo; He, Jianhua

    2017-07-01

    The macromolecular crystallography beamlines at third-generation synchrotron facilities play a central role in solving macromolecular crystal structures and also in understanding the biological function at molecular levels. The MX beamline BL17U at Shanghai Synchrotron Radiation Facility is a typical standard MX beamline with a focused beam size (H × V) of FWHM around 80 μm × 45 μm. However the protein samples brought to the beamline are down to 5-10 m from the important and challenging science project now. These samples require smaller size beam. In order to achieve the mini-size beamline, two mini-beam modes have been developed on BL17U: the pinhole-based mini-beam and the focused mini-beam by compound refractive lens (CRL). Compared to the pinhole-based mode, three times increase in flux is obtained by the CRL mode at a similar beam size. The flux gain obtained by the CRL needs to be considered for data collection strategies. It takes few minutes to switch the beamline from the normal to CRL mini-beam mode.

  2. Study of morphology of aerosol aggregates formed during co-pyrolysis of C3H8 + Fe(CO)5

    NASA Astrophysics Data System (ADS)

    Ivanova, N. A.; Onischuk, A. A.; di Stasio, S.; Baklanov, A. M.; Makhov, G. A.

    2007-04-01

    Formation of aerosol nanoparticles as well as carbon nanotubes and nanofilaments is studied during co-pyrolysis of iron pentacarbonyl and propane with argon as a carrier gas in a flow reactor. Gaseous intermediates from propane thermal decomposition (CH4, C2H6 and C3H4) and Fe(CO)5 conversion are monitored by gas chromatography and IR-spectroscopy, respectively. The aerosol morphology is studied by transmission electron microscopy (TEM) and high resolution TEM. The aerosol particle concentration and size distribution are measured by an automated diffusion battery. The crystal phase composition of particles is studied by x-ray diffractometry. The decomposition of the Fe(CO)5 + Ar mixture resulted in an iron aggregate formation composed of fine primary particles. In the case of lower pyrolysis temperatures, about 450 K, the primary particle mean diameter is about 10 nm, and consequently, the majority of the primary particles are superparamagnetic, thus forming compact aggregates. At intermediate pyrolysis temperatures in the range 800-1040 K the primary particle diameter is about 20-30 nm, and most of the particles are ferromagnetic in nature. The coagulation of these particles results in a chain-like aggregate formation. Finally, at temperatures higher than the Curie point (1043 K) the ferromagnetic properties vanish and the formation of compact aggregates is observed again. The co-pyrolysis of Fe(CO)5 and C3H8 mixed with Ar carrier gas resulted in aerosol aggregate structures dramatically different from those formed by iron pentacarbonyl pyrolysis. In particular, in the temperature range 1070-1280 K, we observed Fe3C particles connected by long carbon nanotubes (CNTs). The aggregate morphology is described in terms of a fractal-like dimension Df, which is determined from TEM images on the basis of a scaling power law linking the aggregate mass (M) and radius (R), M{\\sim}R^{D_f} . The Fe3C-CNT aggregate morphology is a function of the inlet ratio between propane

  3. Satellite Power Systems (SPS) concept definition study (Exhibit D). Volume 3: Transportation analysis

    NASA Technical Reports Server (NTRS)

    Hanley, G. M.

    1981-01-01

    Additional analyses and investigations were conducted to further define transportation system concepts that will be needed for the developmental and operational phases of an SPS program. To accomplish these objectives, transportation systems such as the Shuttle and its derivatives were identified; new heavy lift launch vehicle (HLLV) concepts, cargo and personnel orbital transfer vehicles (EOTV and POTV), and intraorbit transfer vehicle (IOTV) concepts were evaluated; and, to a limited degree, the program implications of their operations and costs were assessed. The results of these analyses were integrated into other elements of the overall SPS concept definition studies.

  4. Economic and demographic issues related to deployment of the Satellite Power System (SPS)

    NASA Technical Reports Server (NTRS)

    Baldwin, T. E.; Hill, L. G.; Santini, D. J.; Stenehjem, E. J.

    1978-01-01

    Growth in energy consumption stimulated interest in exploitation of renewable sources of electric energy. One technology that was proposed is the Satellite Power System (SPS). Before committing the U.S. to such a large program, the Department of Energy and the National Aeronautics and Space Administration are jointly participating in an SPS Concept Development and Evaluation Program. This white paper on industrial and population relocation is part of the FY 78 preliminary evaluation of related socio-economic issues. Results of four preliminary assessment activities are documented.

  5. Satellite Power Systems (SPS) concept definition study, exhibit C. Volume 2, part 1: System engineering

    NASA Technical Reports Server (NTRS)

    Hanley, G. M.

    1979-01-01

    Volume 2, Part 1, of a seven volume report is presented. Part 1 encompasses Satellite Power Systems (SPS) systems engineering aspects and is divided into three sections. The first section presents descriptions of the various candidate concepts considered and conclusions and recommendations for a preferred concept. The second section presents a summary of results of the various trade studies and analysis conducted during the course of the study. The third section describes the Photovoltaic Satellite Based Satellite Power System (SPS) Point Design as it was defined through studies performed during the period January 1977 through March 1979.

  6. Prototype Environmental Assessment of the impacts of siting and construction of an SPS ground receiving station

    NASA Technical Reports Server (NTRS)

    Hill, J.

    1980-01-01

    A prototype assessment of the environmental impacts of siting and constructing a Satellite Power System (SPS) Ground Receiving Station (GRS) is reported. The objectives of the study were: (1) to develop an assessment of the nonmicrowave related impacts of the reference system SPS GRS on the natural environment; (2) to assess the impacts of GRS construction and operations in the context of actual baseline data for a site in the California desert; and (3) to identify critical GRS characteristics or parameters that are most significant in terms of the natural environment.

  7. Possibility of high efficient beam extraction from the CERN SPS with a bent crystal. Simulation results

    NASA Astrophysics Data System (ADS)

    Scandale, W.; Kovalenko, A. D.; Taratin, A. M.

    2017-03-01

    The extraction of the SPS beam of 270 GeV/c protons assisted by a bent crystal was studied by simulation. Two methods for delivering the SPS beam onto a crystal were considered: transverse diffusion and orbit bump of the beam. It was shown that the main condition for high efficient beam extraction with a bent crystal, which is a small divergence of the incident beam, can be fulfilled. Extraction efficiency up to 99% can be reached for both methods of the beam delivering. The irradiation of the electrostatic septum wires during the beam extraction can be considerably reduced.

  8. Search for the quark-gluon plasma (1989): The NA35 experiment at the CERN SPS

    SciTech Connect

    Pugh, H.G.

    1989-09-01

    Results from the NA35 experiment at the CERN SPS are described in the context of possible formation and identification of a quark-gluon plasma (QGP). Evidence is presented that the initial energy density and temperature are sufficient for the QGP to be produced, and that hydrodynamic flow occurs in the expansion stage. Evidence for an unexpectedly large pion source size and for enhanced strangeness production is presented, and discussed in terms of QGP formation. Plans for experiments in 1990--91 with an expanded set up are presented, and prospects for a program with Pb beams at the SPS are discussed. 39 refs., 12 figs.

  9. Neutrino Flux Prediction for the NuMI Beamline

    SciTech Connect

    Soplin, Leonidas Aliaga

    2016-01-01

    The determination of the neutrino flux in any conventional neutrino beam presents a challenge for the current and future short and long baseline neutrino experiments. The uncertainties associated with the production and attenuation of the hadrons in the beamline materials along with those associated with the beam optics have a big effect in the flux spectrum knowledge. For experiments like MINERvA, understanding the flux is crucial since it enters directly into every neutrino-nucleus cross-sections measurements. The foundation of this work is predicting the neutrino flux at MINERvA using dedicated measurements of hadron production in hadron-nucleus collisions and incorporating in-situ MINERvA data that can provide additional constraints. This work also includes the prospect for predicting the flux at other detectors like the NOvA Near detector. The procedure and conclusions of this thesis will have a big impact on future hadron production experiments and on determining the flux for the upcoming DUNE experiment.

  10. Optimized baffle and aperture placement in neutral beamlines

    SciTech Connect

    Stone, R.; Duffy, T.; Vetrovec, J.

    1983-11-23

    Most neutral beamlines contain an iron-core ion-bending magnet that requires shielding between the end of the neutralizer and this magnet. This shielding allows the gas pressure to drop prior to the beam entering the magnet and therefore reduces beam losses in this drift region. We have found that the beam losses can be reduced even further by eliminating the iron-core magnet and the magnetic shielding altogether. The required bending field can be supplied by current coils without the iron poles. In addition, placement of the baffles and apertures can affect the cold gas entering the plasma region and the losses in the neutral beam due to re-ionization. In our study we varied the placement of the baffles, which determine the amount of pumping in each chamber, and the apertures, which determine the beam loss. Our results indicate that a baffle/aperture configuration can be set for either minimum cold gas into the plasma region or minimum beam losses, but not both.

  11. Neutrino Flux Prediction for the NuMI Beamline

    NASA Astrophysics Data System (ADS)

    Aliaga Soplin, Leonidas

    The determination of the neutrino flux in any conventional neutrino beam presents a challenge for the current and future short and long baseline neutrino experiments. The uncertainties associated with the production and attenuation of the hadrons in the beamline materials along with those associated with the beam optics have a big effect in the flux spectrum knowledge. For experiments like MINERvA, understanding the flux is crucial since it enters directly into every neutrino-nucleus cross-section measurements. The foundation of this work is predicting the neutrino flux at MINERvA using dedicated measurements of hadron production in hadron-nucleus collisions and incorporating in-situ MINERvA data that can provide additional constraints. This work also includes the prospect for predicting the flux at other detectors like the NOvA Near. The procedure and conclusions of this thesis will have a big impact on future hadron production experiments and on determining the flux for the upcoming DUNE experiment.

  12. DISCO: a low-energy multipurpose beamline at synchrotron SOLEIL.

    PubMed

    Giuliani, Alexandre; Jamme, Frédéric; Rouam, Valérie; Wien, Frank; Giorgetta, Jean-Luc; Lagarde, Bruno; Chubar, Oleg; Bac, Stéphane; Yao, Isabelle; Rey, Solène; Herbeaux, Christian; Marlats, Jean-Louis; Zerbib, Daniel; Polack, François; Réfrégiers, Matthieu

    2009-11-01

    DISCO, a novel low-energy beamline covering the spectrum range from the VUV to the visible, has received its first photons at the French synchrotron SOLEIL. In this article the DISCO design and concept of three experimental stations serving research communities in biology and chemistry are described. Emphasis has been put on high flux generation and preservation of polarization at variable energy resolutions. The three experiments include a completely new approach for microscopy and atmospheric pressure experiments as well as a ;classical' synchrotron radiation circular dichroism station. Preliminary tests of the optical design and technical concept have been made. Theoretical predictions of the beam have been compared with the first images produced by the first photons originating from the large-aperture bending-magnet source. Results are also reported concerning the cold finger used to absorb hard X-ray radiation in the central part of the synchrotron beam and to avoid heavy thermal load on the following optics. Wavelength selection using monochromators with different gratings for each experimental set-up as well as beam propagation and conditioning throughout the optical system are detailed. First photons comply very well with the theoretical calculations.

  13. Optimization of High-Energy Implanter Beamline Pumping

    SciTech Connect

    LaFontaine, Marvin; Pharand, Michel; Huang Yongzhang; Pokidov, Ilya; Ferrara, Joseph

    2006-11-13

    A high-energy implanter process chamber and its pumping configuration were designed to minimize the residual gas density in the endstation. A modified Nastran trade mark sign finite-element analysis (FEA) code was used to calculate the pressure distribution and gas flow within the process chamber. The modified FE method was readily applied to the internal geometry of the scan chamber, the corrector magnet waveguide, and the process chamber, which included the scan arm assembly, 300mm wafer, and plasma electron flood gun (PEF). Using the modified Nastran code, the gas flow and pressure distribution within the beamline geometry were calculated. The gas load consisted of H2, which is generated by photoresist (PR) outgassing from the 300mm wafer, and Xe from the plasma electron flood gun. Several pumping configurations were assessed, with each consisting of various locations and pumping capacities of vacuum pumps. The pressure distribution results for each configuration are presented, along with pumping efficiency results which are helpful in selecting the optimum pump configuration. The analysis results were compared to measured data, indicating a good correlation between the two.

  14. The EMIL project at BESSY II: Beamline design and performance

    SciTech Connect

    Hendel, Stefan Schäfers, Franz; Reichardt, Gerd; Scheer, Michael; Bahrdt, Johannes; Lips, Klaus; Hävecker, Michael

    2016-07-27

    The Energy Materials In-Situ Laboratory Berlin (EMIL) at BESSY-II is currently under construction. Two canted undulators for soft- and hard X-rays will be installed into the BESSY II storage ring in one straight section, complex beamlines with more than twenty optical elements will be set up and a new laboratory building attached to BESSY II will host three endstations and a large UHV-transfer system connecting various HV- and UHV-deposition systems. The undulators, UE48 and U17, provide a broad energy spectrum of 80 - 10000 eV, of which the harder radiation (>700 eV) is provided by a cryogenic in-vacuum device. Three monochromators (two plane grating monochromators (PGM) and one LN{sub 2}-cooled double crystal monochromator (DCM)) disperse the radiation into separate pathways of 65 m length, while downstream of the monochromators split-mirror chambers distribute the photon beam to one (or simultaneously to two) of five upcoming endstations. Three of these endstations are designed for the full energy range with spatial overlap of the soft and hard foci, whereas one endstation (PEEM) uses only the soft and another one (PINK) only the hard branch, respectively.

  15. Automatic sample Dewar for MX beam-line

    SciTech Connect

    Charignon, T.; Tanchon, J.; Trollier, T.; Ravex, A.; Theveneau, P.

    2014-01-29

    It is very common for crystals of large biological macromolecules to show considerable variation in quality of their diffraction. In order to increase the number of samples that are tested for diffraction quality before any full data collections at the ESRF*, an automatic sample Dewar has been implemented. Conception and performances of the Dewar are reported in this paper. The automatic sample Dewar has 240 samples capability with automatic loading/unloading ports. The storing Dewar is capable to work with robots and it can be integrated in a full automatic MX** beam-line. The samples are positioned in the front of the loading/unloading ports with and automatic rotating plate. A view port has been implemented for data matrix camera reading on each sample loaded in the Dewar. At last, the Dewar is insulated with polyurethane foam that keeps the liquid nitrogen consumption below 1.6 L/h. At last, the static insulation also makes vacuum equipment and maintenance unnecessary. This Dewar will be useful for increasing the number of samples tested in synchrotrons.

  16. Detectors Requirements for the ODIN Beamline at ESS

    NASA Astrophysics Data System (ADS)

    Morgano, Manuel; Lehmann, Eberhard; Strobl, Markus

    The upcoming high intensity pulsed spallationneutron source ESS, now in construction in Sweden, will provide unprecedented opportunities for neutron science worldwide. In particular, neutron imaging will benefit from the time structure of the source and its high brilliance. These features will unlock new opportunities at the imaging beamline ODIN, but only if suitable detectors are employed and, in some cases, upgraded. In this paper, we highlight the current state-of-the-art for neutron imaging detectors, pointing out that, while no single presently existing detector can fulfill all the requirements currently needed to exploit the source to its limits, the wide range of applications of ODIN can be successfully covered by a suite of current state-of-the-art detectors. Furthermore we speculate on improvements to the current detector technologies that would expand the range of the existing detectors and application range and we outline a strategy to have the best possible combined system for the foreseen day 1 operations of ODIN in 2019.

  17. Students on the Beamline: classroom, research, and discovery

    NASA Astrophysics Data System (ADS)

    Patry, J.; Walker, T.

    2012-12-01

    High level research is mainly the focus of trained scientists who possess a science specific background. The Canadian Light Source outreach service has developed a two stage research immersion approach which brings together students, teachers, and renowned scientists: Students on the Beamline. The first stage offers a training session for teachers to develop their professional competencies in regards to authentic science research and the synchrotron facility. During the second stage, students from classrooms apply a research protocol of their own design with the help of their teacher and synchrotron scientists. During this presentation, we will first explain the professional approach of the training. In the second part, two experiments designed by students will be presented which are geophysically based so to speak: Study of the Meteoritic Melt Sheet of the Manicouagan Basin and Effects of Olivine on the capture of NOx. Results have shown that teachers bring in the classroom a more authentic and new experience in research application. As for the students, their unique research has contributed to the increase of our knowledge and a better understanding of the scientific inquiry process.Scientist and teacher working together on the synchrotron

  18. Simple ``Package Design'' Ion Chamber Monitors for TRIUMF's Proton Beamlines

    NASA Astrophysics Data System (ADS)

    Gray, Daniel; Minato, Brian

    2002-12-01

    In the beam line designed to supply 100 μA of 500 MeV protons to the two ISAC production targets at TRIUMF, 13 profile monitor stations were required. The design allows each station to be fitted with either an air driven wire scanner module for high currents or an ionization chamber for low currents. Ring shaped multilayer G10 circuit boards were designed for the latter to enable a simple modular "gas package" that is easily serviced and aligned. These gas packages have only five basic parts, two outer window frames with 0.010 in. thick E-beam welded Al windows, two ring shaped circuit boards with 2 mm wire spacing and edge card connectors (X and Y use the same design of board) and one center frame for mounting to the inserting mechanism and holding a .001 in. Al foil. The circuit boards are critical components due to the necessity to hold vacuum along their edges. Signal traces pass from the inner part of the ring that is gas filled to the outside of the ring that is in vacuum. The windows and center foil frame are at -300 V bias. This gas package design led to a similar design used to upgrade the existing (1970's vintage) proton beamline ion chamber monitors.

  19. Neutrino Flux Prediction for the NuMI Beamline

    SciTech Connect

    Aliaga Soplin, Leonidas

    2016-01-01

    The determination of the neutrino flux in any conventional neutrino beam presents a challenge for the current and future short and long baseline neutrino experiments. The uncertainties associated with the production and attenuation of the hadrons in the beamline materials along with those associated with the beam optics have a big effect in the flux spectrum knowledge. For experiments like MINERvA, understanding the flux is crucial since it enters directly into every neutrino-nucleus cross-sections measurements. The foundation of this work is predicting the neutrino flux at MINERvA using dedicated measurements of hadron production in hadron-nucleus collisions and incorporating in-situ MINERvA data that can provide additional constraints. This work also includes the prospect for predicting the flux at other detectors like the NOvA Near detector. The procedure and conclusions of this thesis will have a big impact on future hadron production experiments and on determining the fl ux for the upcoming DUNE experiment.

  20. Optimization of High-Energy Implanter Beamline Pumping

    NASA Astrophysics Data System (ADS)

    LaFontaine, Marvin; Pharand, Michel; Huang, Yongzhang; Pokidov, Ilya; Ferrara, Joseph

    2006-11-01

    A high-energy implanter process chamber and its pumping configuration were designed to minimize the residual gas density in the endstation. A modified Nastran™ finite-element analysis (FEA) code was used to calculate the pressure distribution and gas flow within the process chamber. The modified FE method was readily applied to the internal geometry of the scan chamber, the corrector magnet waveguide, and the process chamber, which included the scan arm assembly, 300mm wafer, and plasma electron flood gun (PEF). Using the modified Nastran code, the gas flow and pressure distribution within the beamline geometry were calculated. The gas load consisted of H2, which is generated by photoresist (PR) outgassing from the 300mm wafer, and Xe from the plasma electron flood gun. Several pumping configurations were assessed, with each consisting of various locations and pumping capacities of vacuum pumps. The pressure distribution results for each configuration are presented, along with pumping efficiency results which are helpful in selecting the optimum pump configuration. The analysis results were compared to measured data, indicating a good correlation between the two.

  1. Crystal Monochromator based Emittance Measurements at the PETRA Undulator Beamline

    NASA Astrophysics Data System (ADS)

    Hahn, U.; Schulte-Schrepping, H.

    2004-05-01

    The synchrotron radiation beamline at the PETRA storage ring at DESY with two end stations uses a 4 m-long undulator delivering hard X-ray photons up to 300 keV at a storage ring energy of 12 GeV. The spatial photon intensity distribution at the first undulator harmonic (21.23 keV) was used to determine the horizontal emittance of the storage ring. The set-up installed at 107.7 m from the source point consists of a vacuum chamber with a cryogenically cooled silicon crystal in Laue geometry. The monochromatized radiation is converted to visible light by a fluorescent screen on the back of an aluminum plate and observed by a digital camera. Gaussian fits to horizontal lines through the centre of mass of the images provide the standard deviations of the measured intensity distributions in the horizontal plane. The corresponding emittance values were derived by modeling the whole setup with the SPECTRA code using the emittance as a free parameter and by using machine physics formulas neglecting photon source size effects.

  2. Avian influenza virus hemagglutinins H2, H4, H8, and H14 support a highly pathogenic phenotype

    PubMed Central

    Veits, Jutta; Weber, Siegfried; Stech, Olga; Breithaupt, Angele; Gräber, Marcus; Gohrbandt, Sandra; Bogs, Jessica; Hundt, Jana; Teifke, Jens P.; Mettenleiter, Thomas C.; Stech, Jürgen

    2012-01-01

    High-pathogenic avian influenza viruses (HPAIVs) evolve from low-pathogenic precursors specifying the HA serotypes H5 or H7 by acquisition of a polybasic HA cleavage site. As the reason for this serotype restriction has remained unclear, we aimed to distinguish between compatibility of a polybasic cleavage site with H5/H7 HA only and unique predisposition of these two serotypes for insertion mutations. To this end, we introduced a polybasic cleavage site into the HA of several low-pathogenic avian strains with serotypes H1, H2, H3, H4, H6, H8, H10, H11, H14, or H15, and rescued HA reassortants after cotransfection with the genes from either a low-pathogenic H9N2 or high-pathogenic H5N1 strain. Oculonasal inoculation with those reassortants resulted in varying pathogenicity in chicken. Recombinants containing the engineered H2, H4, H8, or H14 in the HPAIV background were lethal and exhibited i.v. pathogenicity indices of 2.79, 2.37, 2.85, and 2.61, respectively, equivalent to naturally occurring H5 or H7 HPAIV. Moreover, the H2, H4, and H8 reassortants were transmitted to some contact chickens. The H2 reassortant gained two mutations in the M2 proton channel gate region, which is affected in some HPAIVs of various origins. Taken together, in the presence of a polybasic HA cleavage site, non-H5/H7 HA can support a highly pathogenic phenotype in the appropriate viral background, indicating requirement for further adaptation. Therefore, the restriction of natural HPAIV to serotypes H5 and H7 is likely a result of their unique predisposition for acquisition of a polybasic HA cleavage site. PMID:22308331

  3. Upgrade of beamline BL08B at Taiwan Light Source from a photon-BPM to a double-grating SGM beamline.

    PubMed

    Yuh, Jih Young; Lin, Shan Wei; Huang, Liang Jen; Fung, Hok Sum; Lee, Long Life; Chen, Yu Joung; Cheng, Chiu Ping; Chin, Yi Ying; Lin, Hong Ji

    2015-09-01

    During the last 20 years, beamline BL08B has been upgraded step by step from a photon beam-position monitor (BPM) to a testing beamline and a single-grating beamline that enables experiments to record X-ray photo-emission spectra (XPS) and X-ray absorption spectra (XAS) for research in solar physics, organic semiconductor materials and spinel oxides, with soft X-ray photon energies in the range 300-1000 eV. Demands for photon energy to extend to the extreme ultraviolet region for applications in nano-fabrication and topological thin films are increasing. The basic spherical-grating monochromator beamline was again upgraded by adding a second grating that delivers photons of energy from 80 to 420 eV. Four end-stations were designed for experiments with XPS, XAS, interstellar photoprocess systems (IPS) and extreme-ultraviolet lithography (EUVL) in the scheduled beam time. The data from these experiments show a large count rate in core levels probed and excellent statistics on background normalization in the L-edge adsorption spectrum.

  4. Dissociative recombination and mutual neutralization of heavier molecular ions: C10H8+, WF5+, and CnFm+

    NASA Astrophysics Data System (ADS)

    Wiens, Justin P.; Shuman, Nicholas S.; Viggiano, Albert A.

    2015-03-01

    Dissociative recombination (DR) rate coefficients for the naphthalene cation, C10H8+, and WF5+, and mutual neutralization (MN) rate coefficients for these species and five CnFm+ ions, were determined at 300 K using variable electron and neutral density attachment mass spectrometry (VENDAMS). DR proceeds at 9 ± 3 × 10-7 cm3 s-1 for C10H8+ and at 6.1 ± 1.4 × 10-7 cm3 s-1 for WF5+. Consistent with previous results, MN for the polyatomic cations with the halide anions Cl-, Br-, and I- exhibits an approximate μ-1/2 reduced mass dependence of the reactant partners, demonstrating that ion collision velocities influence the rate coefficients. This work is an extension of VENDAMS to systems, where low reactant concentrations are necessary to avoid significant reaction of product ions with the neutral precursor, i.e., conditions not suitable for traditional flowing afterglow measurements, as well as to ions of masses > ˜ 100 Da, which are not amenable to the study of DR in magnetic storage rings. Our results expand the sparse literature on DR and MN of heavier ions.

  5. Threshold Ionization of La(C_5H_8) Formed by La-MEDIATED Dehydrogenation of 1-PENTENE

    NASA Astrophysics Data System (ADS)

    Cao, Wenjin; Zhang, Yuchen; Yang, Dong-Sheng

    2016-06-01

    La(C_5H_8) was formed by La reaction with 1-pentene (CH2=CH-CH2-CH3) in a laser-vaporization supersonic molecular beam source and characterized with mass-analyzed threshold ionization (MATI) spectroscopy. The MATI spectrum displays an origin band at 38988 (5) wn and three vibrational intervals of 130, 294, and 415 wn. The La(C_5H_8) complex is identified as a five-membered metallacycle in C1 point group, with the doublet and singlet being the lowest energy states of the neutral and cation, respectively. The energy at 38998 wn corresponds to the adiabatic ionization energy of the complex, and the three vibration intervals in the order of the frequency increase are assigned to the terminal CH_3 torsion, asymmetric La-ligand stretch, and symmetric La-ligand stretch excitation of the ion. The La + 1-penetene reaction will also be compared with La reactions with other five-carbon hydrocarbon molecules, such as isoprene, 1-pentyne, and 1,4-pentadiene.

  6. Dimer-formation in the bis(arene)chromium fulleride Cr(C7H8)2 C60

    NASA Astrophysics Data System (ADS)

    Hönnerscheid, Andreas; van Wüllen, Leo; Jansen, Martin; Rahmer, Jürgen; Mehring, Michael

    2001-10-01

    Bis(toluene)chromium fulleride Cr(C7H8)2 C60 has been synthesized as a microcrystalline powder from C60 and Cr(C7H8)2 in toluene. One electron is transferred from the chromium complex to the fullerene resulting in a magnetic moment of about 2.5±0.2μB at room temperature, which corresponds to two electron spins per formula unit. At 250 K a reversible phase transition from a primitive cubic high temperature paramagnetic phase to a triclinic low temperature dimer phase occurs. The high temperature phase (Pm3¯m, a=9.986 Å) is constituted of dynamically disordered fulleride anions and bis(toluene)chromium (I) cations in a CsCl-type arrangement. The low temperature modification is triclinic (P1¯, a=13.541 Å, b=13.864 Å, c=14.122 Å, α=120.59, β=91.78, γ=116.88) and carries one unpaired electron per formula unit (μ=1.72±0.01 μB), which according to ESR measurements is localized at the chromium site (giso=1.9870). The phase transition has been monitored by x-ray diffraction, ESR and solid state NMR spectroscopy as well as by SQUID measurements. All experimental results can consistently be described within the scenario of dimer formation of the C60 monoanions during the transformation.

  7. Methanethiol degradation in anaerobic bioreactors at elevated pH (8): reactor performance and microbial community analysis.

    PubMed

    van Leerdam, Robin C; de Bok, Frank A M; Bonilla-Salinas, Monica; van Doesburg, Wim; Lomans, Bart P; Lens, Piet N L; Stams, Alfons J M; Janssen, Albert J H

    2008-12-01

    The degradation of methanethiol (MT) at 30 degrees C under saline-alkaline (pH 8-10, 0.5M Na(+)) conditions was studied in a lab-scale Upflow Anaerobic Sludge Blanket (UASB) reactor inoculated with estuarine sediment from the Wadden Sea (The Netherlands). At a sodium concentration of 0.5M and a pH between 8 and 9 complete MT degradation to sulfide, methane and carbon dioxide was possible at a maximum loading rate of 22mmolMTL(-1)day(-1) and a hydraulic retention time of 6h. The presence of yeast extract (100mg/L) in the medium was essential for complete MT degradation. 16S rRNA based DGGE and sequence analysis revealed that species related to the genera Methanolobus and Methanosarcina dominated the archaeal community in the reactor sludge. Their relative abundance fluctuated in time, possibly as a result of the changing operational conditions in the reactor. The most dominant MT-degrading archaeon was enriched from the reactor and obtained in pure culture. This strain WR1, which was most closely related to Methanolobus taylorii, degraded MT, dimethyl sulfide (DMS), methanol and trimethylamine. Its optimal growth conditions were 0.2M NaCl, 30 degrees C and pH 8.4. In batch and reactor experiments operated at pH 10, MT was not degraded.

  8. AI-BL1.0: a program for automatic on-line beamline optimization using the evolutionary algorithm.

    PubMed

    Xi, Shibo; Borgna, Lucas Santiago; Zheng, Lirong; Du, Yonghua; Hu, Tiandou

    2017-01-01

    In this report, AI-BL1.0, an open-source Labview-based program for automatic on-line beamline optimization, is presented. The optimization algorithms used in the program are Genetic Algorithm and Differential Evolution. Efficiency was improved by use of a strategy known as Observer Mode for Evolutionary Algorithm. The program was constructed and validated at the XAFCA beamline of the Singapore Synchrotron Light Source and 1W1B beamline of the Beijing Synchrotron Radiation Facility.

  9. Three Biomedical Beamlines at NSLS-II for Macromolecular Crystallography and Small-Angle Scattering

    NASA Astrophysics Data System (ADS)

    Schneider, D. K.; Berman, L. E.; Chubar, O.; Hendrickson, W. A.; Hulbert, S. L.; Lucas, M.; Sweet, R. M.; Yang, L.

    2013-03-01

    We report on the status of the development of three beamlines for the National Synchrotron Light Source-II (NSLS-II), two for macromolecular crystallography (MX), and one for wide- and small-angle x-ray scattering (SAXS). Funded by the National Institutes of Health, this suite of Advanced Beamlines for Biological Investigations with X-rays (ABBIX) is scheduled to begin operation by 2015. The two MX beamlines share a sector with identical canted in-vacuum undulators (IVU21). The microfocusing FMX beamline on the inboard branch employs a two-stage horizontal source demagnification scheme, will cover an energy range of 5 - 23 keV, and at 12.7 keV will focus a flux of up to 1013 ph/s into a spot of 1 μm width. The companion AMX beamline on the short outboard branch of the sector is tunable in the range of 5 - 18 keV and has a native focus of 4 μm (h) × 2 μm (v). This robust beamline will be highly automated, have high throughput capabilities, and with larger beams and low divergence will be well suited for structure determinations on large complexes. The high brightness SAXS beamline, LIX, will provide multiple dynamic and static experimental systems to support scientific programs in solution scattering, membrane structure determination, and tissue imaging. It will occupy a different sector, equipped with a single in-vacuum undulator (IVU23). It can produce beams as small as 1 μm across, and with a broad energy range of 2.1 - 18 keV it will support anomalous SAXS.

  10. First results from the high-brightness x-ray spectroscopy beamline 9. 3.1 at ALS

    SciTech Connect

    Ng, W.; Jones, G.; Perera, R.C.C.

    1995-10-01

    Beamline 9.3.1 at the Advanced Light Source (ALS) is a windowless beamline, covering the 1-6 keV photon-energy range. This beamline is designed to achieve the goal of high brightness at the sample for use in the X-ray Atomic and Molecular Spectroscopy (XAMS) science, surface and interface science, biology, and x-ray optical development programs at ALS. X-ray absorption and time of flight photoemission measurements in 2 - 5 keV photon energy along with the flux, resolution, spot size and stability of the beamline will be discussed. Prospects for future XAMS measurements will also be presented.

  11. Satellite Power Systems (SPS) concept definition study (Exhibit D). Volume 6, part 1: Cost and Programmatics

    NASA Technical Reports Server (NTRS)

    Hanley, G. M.

    1981-01-01

    A summary of the cost data reviewed as well as conclusions and recommendations are presented. Cost and programmatic aspects of Rockwell's SPS CR-2 reference configuration were based on the results of several contracts with NASA and independent company-sponsored activities by the Space Operations and Satellite Systems Division of Rockwell International.

  12. Satellite Power Systems (SPS) Concept Definition Study (Exhibit D). Solid-State Amplifier Investigation

    NASA Technical Reports Server (NTRS)

    Hanley, G. M.

    1981-01-01

    Data resulting from a continuing effort to provide system/subsystem definition data to aid in the evaluation of the SPS program concept is presented. The specific data described relate to the proposed use of solid state devices as microwave power amplifiers in the satellite microwave power transmission subsystem.

  13. Preliminary environmental assessment for the Satellite Power System (SPS). Revision 1. Volume 2. Detailed assessment

    SciTech Connect

    Not Available

    1980-01-01

    The Department of Energy (DOE) is considering several options for generating electrical power to meet future energy needs. The satellite power system (SPS), one of these options, would collect solar energy through a system of satellites in space and transfer this energy to earth. A reference system has been described that would convert the energy to microwaves and transmit the microwave energy via directive antennas to large receiving/rectifying antennas (rectennas) located on the earth. At the rectennas, the microwave energy would be converted into electricity. The potential environmental impacts of constructing and operating the satellite power system are being assessed as a part of the Department of Energy's SPS Concept Development and Evaluation Program. This report is Revision I of the Preliminary Environmental Assessment for the Satellite Power System published in October 1978. It refines and extends the 1978 assessment and provides a basis for a 1980 revision that will guide and support DOE recommendations regarding future SPS development. This is Volume 2 of two volumes. It contains the technical detail suitable for peer review and integrates information appearing in documents referenced herein. The key environmental issues associated with the SPS concern human health and safety, ecosystems, climate, and electromagnetic systems interactions. In order to address these issues in an organized manner, five tasks are reported: (I) microwave-radiation health and ecological effects; (II) nonmicrowave health and ecological effectss; (III) atmospheric effects; (IV) effects on communication systems due to ionospheric disturbance; and (V) electromagnetic compatibility. (WHK)

  14. Intermittency in {sup 32}S + S and {sup 32}S + Au collisions at the CERN SPS

    SciTech Connect

    Bloomer, M.A.; Jacobs, P.; WA80 Collaboration

    1991-12-01

    Nonstatistical or ``intermittent`` fluctuations of charged particle multiplicities have been investigated at the CERN SPS with the WA80 multiplicity array for {sup 32}S+S and {sup 32}S+Au collisions of varying centrality. Within the phase space domain studied there is no evidence for intermittency in these collisions beyond that accounted for by FRITIOF filtered through a full detector simulation.

  15. Intermittency in sup 32 S + S and sup 32 S + Au collisions at the CERN SPS

    SciTech Connect

    Bloomer, M.A.; Jacobs, P.

    1991-12-01

    Nonstatistical or intermittent'' fluctuations of charged particle multiplicities have been investigated at the CERN SPS with the WA80 multiplicity array for {sup 32}S+S and {sup 32}S+Au collisions of varying centrality. Within the phase space domain studied there is no evidence for intermittency in these collisions beyond that accounted for by FRITIOF filtered through a full detector simulation.

  16. Solar power satellite, system definition study. Part 2, volume 3: SPS satellite systems

    NASA Technical Reports Server (NTRS)

    1977-01-01

    The differences in approach to solar energy conversion by solar cells and thermal engine systems are examined. Systems requirements for the solar power satellite (SPS) are given along with a description of the primary subsystems. Trades leading to exact configuration selection, for example, selection of the Rankine cycle operating temperatures are explained, and two satellite configurations are discussed.

  17. Satellite Power System (SPS) resource requirements (critical materials, energy, and land)

    NASA Technical Reports Server (NTRS)

    Kotin, A. D.

    1978-01-01

    The resource impacts of the proposed satellite power system (SPS) were reviewed. Three classes of resource impacts were considered separately: critical materials, energy and land use. The analysis focused on the requirements associated with the annual development of two five-gigawatt satellites and the associated receiving facilities.

  18. Bibliography for the Satellite Power System (SPS) Concept Development and Evaluation Program

    SciTech Connect

    Abromavage, M.; Calzadilla, R.; Murray, M.

    1981-04-01

    This bibliography encompasses systems definition and engineering aspects; environmental assessment of microwave health and ecology, risks to space workers and atmospheric effects; a societal assessment covering resource requirements (land and materials) international and institutional issues; and a comparative assessment of the SPS Reference System relative to other advanced energy technologies, such as fusion. (MHR)

  19. The SPS interference problem-electronic system effects and mitigation techniques

    NASA Technical Reports Server (NTRS)

    Juroshek, J. R.

    1980-01-01

    The potential for interference between solar power satellites (SPS) and other Earth satellite operations was examined along with interference problems involving specific electronic devices. Conclusions indicate that interference is likely in the 2500 MHz to 2690 MHz direct broadcast satellite band adjacent to SPS. Estimates of the adjacent channel noise from SPS in this band are as high as -124 dBc/4 kHz and -100 dBc/MHz, where dBc represents decibels relative to the total power in the fundamental. A second potential problem is the 7350 MHz, 3d harmonic from SPS that falls within the 7300 MHz to 7450 MHz space to Earth, government, satellite assignment. Catastrophic failures can be produced in integrated circuits when the microwave power levels coupled into inputs and power leads reach 1 to 100 watts. The failures are typically due to bonding wire melting, metallization failures, and junction shorting. Nondestructive interaction or interference, however, generally occurs with coupled power levels of the order of 10 milliwatts. This integration is due to the rectification of microwave energy by the numerous pn junctions within these circuits.

  20. Satellite Power Systems /SPS/ - Overview of system studies and critical technology

    NASA Technical Reports Server (NTRS)

    Manson, S. V.

    1980-01-01

    Systems studies and critical technology issues for the development and evaluation of Satellite Power Systems (SPS) for the photovoltaic generation of electrical energy and its transmission to earth are reviewed. Initial concept studies completed in 1976 and system definition studies initiated in the same year have indicated the technical feasibility of SPS and identified challenging issues to be addressed as part of the SPS Concept Development and Evaluation Program. Systems considered in the study include photovoltaic and solar thermal power conversion configurations employing klystron or solid state microwave generators or lasers for power transmission, and power transmission options, system constructability and in-orbit and ground operations. Technology investigations are being performed in the areas of microwave power transmission, structure/controls interactions and the behavior of key materials in the space/SPS environment. Favorable results have been obtained in the areas of microwave phase distribution and phase control, dc-RF conversion, antenna radiating element, and no insurmountable problems have been discovered in any of the investigations to date.

  1. The adapting of the crossed-field directional amplifier to the requirements of the SPS

    NASA Technical Reports Server (NTRS)

    Brown, W. C.

    1980-01-01

    Progress in adapting the crossed-field directional amplifier to the SPS is reviewed. Special emphasis is given to (1) recent developments in controlling the phase and amplitude of the microwave power output, (2) a received architecture for its placement in the subarray, and (3) recent developments in the critical pivotal areas of noise, potential cathode life, and efficiency.

  2. DESIGN OF VISIBLE DIAGNOSTIC BEAMLINE FOR NSLS2 STORAGE RING

    SciTech Connect

    Cheng, W.; Fernandes, H.; Hseuh, H.; Kosciuk, B.; Krinsky, S.; Singh, O.

    2011-03-28

    A visible synchrotron light monitor (SLM) beam line has been designed at the NSLS2 storage ring, using the bending magnet radiation. A retractable thin absorber will be placed in front of the first mirror to block the central x-rays. The first mirror will reflect the visible light through a vacuum window. The light is guided by three 6-inch diameter mirrors into the experiment hutch. In this paper, we will describe design work on various optical components in the beamline. The ultra high brightness NSLS-II storage ring is under construction at Brookhaven National Laboratory. It will have 3GeV, 500mA electron beam circulating in the 792m ring, with very low emittance (0.9nm.rad horizontal and 8pm.rad vertical). The ring is composed of 30 DBA cells with 15 fold symmetry. Three damping wigglers will be installed in long straight sections 8, 18 and 28 to lower the emittance. While electrons pass through the bending magnet, synchrotron radiation will be generated covering a wide spectrum. There are other insertion devices in the storage ring which will generate shorter wavelength radiation as well. Synchrotron radiation has been widely used as diagnostic tool to measure the transverse and longitudinal profile. Three synchrotron light beam lines dedicated for diagnostics are under design and construction for the NSLS-II storage ring: two x-ray beam lines (pinhole and CRL) with the source points from Cell 22 BM{_}A (first bending in the DBA cell) and Cell22 three-pole wiggler; the third beam line is using visible part of radiation from Cell 30 BM{_}B (second bending magnet from the cell). Our paper focuses on the design of the visible beam line - SLM.

  3. Cold Ion-Molecule Chemistry with a Stark Decelerator Beamline

    NASA Astrophysics Data System (ADS)

    Oldham, James M.; Bell, Martin T.; Harper, Lee D.; Softley, Timothy P.

    2012-06-01

    We describe an experimental method for studying ion-molecule reactive collisions at very low energies. Building on our previous work using an electrostatic quadrupole guide as a source of cold neutral molecules, we discuss a proof of principle study of the charge-exchange reaction between cold xenon ions and Stark decelerated ammonia molecules. Ammonia molecules from a pulsed supersonic expansion are produced at low velocities using the Stark deceleration technique of Meijer and co-workers. The decelerated molecules are focussed using pulsed electrostatic hexapoles into the centre of a radiofrequency ion trap where they collide with cold xenon ions. A fast-opening vacuum-compatible mechanical shutter installed in the beamline is used to prevent transmission of the undecelerated molecules and carrier gas into the ion trap chamber. To prepare the target ions, the ion trap is loaded with calcium ions, which are Doppler laser cooled to form a low-temperature ordered ``Coulomb crystal'' phase. Xenon ions formed by resonant multiphoton ionisation are subsequently loaded and sympathetically cooled through their Coulomb interaction with the laser-cooled ions. The spatial distribution of fluorescence emitted by the laser-cooled ions in the multicomponent crystal is imaged; reactive collisions of Xe^+ with ND_3 are observed and quantified through changes in this distribution. By varying the high voltage switching sequence applied to the decelerator, the velocity of the ammonia molecules can be tuned from around 250 m/s to 35 m/s. For collisions with trapped xenon ions, this corresponds to collision energies (expressed in temperature units) from 65 K down to close to 1 K.

  4. XDS: a flexible beamline for X-ray diffraction and spectroscopy at the Brazilian synchrotron.

    PubMed

    Lima, F A; Saleta, M E; Pagliuca, R J S; Eleotério, M A; Reis, R D; Fonseca Júnior, J; Meyer, B; Bittar, E M; Souza-Neto, N M; Granado, E

    2016-11-01

    The majority of the beamlines at the Brazilian Synchrotron Light Source Laboratory (LNLS) use radiation produced in the storage-ring bending magnets and are therefore currently limited in the flux that can be used in the harder part of the X-ray spectrum (above ∼10 keV). A 4 T superconducting multipolar wiggler (SCW) was recently installed at LNLS in order to improve the photon flux above 10 keV and fulfill the demands set by the materials science community. A new multi-purpose beamline was then installed at the LNLS using the SCW as a photon source. The XDS is a flexible beamline operating in the energy range between 5 and 30 keV, designed to perform experiments using absorption, diffraction and scattering techniques. Most of the work performed at the XDS beamline concentrates on X-ray absorption spectroscopy at energies above 18 keV and high-resolution diffraction experiments. More recently, new setups and photon-hungry experiments such as total X-ray scattering, X-ray diffraction under high pressures, resonant X-ray emission spectroscopy, among others, have started to become routine at XDS. Here, the XDS beamline characteristics, performance and a few new experimental possibilities are described.

  5. Ray-tracing as a tool for efficient specification of beamline optical components

    NASA Astrophysics Data System (ADS)

    Pedreira, P.; Sics, I.; Llonch, M.; Ladrera, J.; Ribó, Ll.; Colldelram, C.; Nicolas, J.

    2016-09-01

    We propose a method to determine the required performances of the positioning mechanics of the optical elements of a beamline. Generally, when designing and specifying a beamline, one assumes that the position and orientations of the optical elements should be aligned to its ideal position. For this, one would generally require six degrees of freedom per optical element. However, this number is reduced due to symmetries (e.g. a flat mirror does not care about yaw). Generally, one ends up by motorizing many axes, with high resolution and a large motion range. On the other hand, the diagnostics available at a beamline provide much less variables than the available motions. Moreover, the actual parameters that one wants to optimize are reduced to a very few. These are basically, spot size and size at the sample, flux, and spectral resolution. The result is that many configurations of the beamline are actually equivalent, and therefore indistinguishable from the ideal alignment in terms of performance.We propose a method in which the effect of misalignment of each one of the degrees of freedom of the beamline is scanned by ray tracing. This allows building a linear system in which one can identify and select the best set of motions to control the relevant parameters of the beam. Once the model is built it provides the required optical pseudomotors as well as the requirements in alignment and manufacturing, for all the motions, as well as the range, resolution and repeatability of the motorized axes.

  6. Optimization of the design for beamline with fast polarization switching elliptically polarized undulators.

    PubMed

    Cao, Jiefeng; Wang, Yong; Zou, Ying; Zhang, Xiangzhi; Wu, Yanqing; Tai, Renzhong

    2016-03-01

    Fast switching of X-ray polarization with a lock-in amplifier is a good method for acquiring weak signals from background noise for X-ray magnetic circular dichroism (XMCD) experiments. The usual way to obtain a beam with fast polarization switching is to use two series of elliptically polarized undulators (tandem twin EPUs). The two EPUs generate two individual beams. Each beam has a different polarization and is fast switched into the beamline. It is very important to ensure that the energy resolution, the flux and the spot size at the sample of the two beams are equal in XMCD experiments. However, it is difficult in beamline design because the distances from the two EPUs to the beamline optics are different and the beamline is not switchable. In this work, a beamline design without an entrance slit for fast polarization switching EPUs is discussed. The energy resolution of the two beams can be tuned to be equal by minor rotation of the optics in the monochromator. The flux of the two beams can be balanced through separation blades X, Y in the exit slit, and by adjusting the position of the X blades along the beam. The spot size of the two beams can be adjusted to be equal by shifting the sample as well.

  7. The vacuum ultraviolet beamline/endstations at NSRL dedicated to combustion research.

    PubMed

    Zhou, Zhongyue; Du, Xuewei; Yang, Jiuzhong; Wang, Yizun; Li, Chaoyang; Wei, Shen; Du, Liangliang; Li, Yuyang; Qi, Fei; Wang, Qiuping

    2016-07-01

    An undulator-based vacuum ultraviolet (VUV) beamline (BL03U), intended for combustion chemistry studies, has been constructed at the National Synchrotron Radiation Laboratory (NSRL) in Hefei, China. The beamline is connected to the newly upgraded Hefei Light Source (HLS II), and could deliver photons in the 5-21 eV range, with a photon flux of 10(13) photons s(-1) at 10 eV when the beam current is 300 mA. The monochromator of the beamline is equipped with two gratings (200 lines mm(-1) and 400 lines mm(-1)) and its resolving power is 3900 at 7.3 eV for the 200 lines mm(-1) grating and 4200 at 14.6 eV for the 400 lines mm(-1) grating. The beamline serves three endstations which are designed for respective studies of premixed flame, fuel pyrolysis in flow reactor, and oxidation in jet-stirred reactor. Each endstation contains a reactor chamber, an ionization chamber where the molecular beam intersects with the VUV light, and a home-made reflectron time-of-flight mass spectrometer. The performance of the beamline and endstations with some preliminary results is presented here. The ability to detect reactive intermediates (e.g. H, O, OH and hydroperoxides) is advantageous in combustion chemistry research.

  8. Design of the Structural Biology Center beamlines at the APS (abstract)

    NASA Astrophysics Data System (ADS)

    Rosenbaum, Gerd; Westrbrook, Edwin M.

    1996-09-01

    The Structural Biology Center-CAT will develop and operate a sector of the APS as a user facility for studies in macromolecular crystallography. The techniques applied will include multiple-energy anomalous dispersion (MAD) phasing and polychromatic (Laue) data collection. Data will be recorded on a high resolution CCD-area detector. The SBC is constructing two beamlines, one for radiation from an undulator and one for radiation from a bending magnet. The x ray optics of both beamlines are designed to produce a highly demagnified image of the source in order to match the focal size with the sizes of the sample and the resolution element of the detector. Vertical focusing is achieved by a flat, cylindrically bent mirror. Horizontal focusing is achieved by sagittally bending the second crystal of a double crystal-monochromator. The double-crystal monochromators of both beamlines have a constant exit height output beam. On the undulator beamline, two double-crystal monochromators are installed in series—one with Si-111 crystals and the second with Si-220 crystals—in order to facilitate quick change between high flux and narrow bandwidth. For the heat-loaded first crystals, the liquid-nitrogen-cooled, thin-web design being developed by the APS has been adopted. On the bending magnet beamline, three crystals (Si-111, Si-220, Si-400) are mounted side-by-side on the first crystal stage and translated into the beam is required.

  9. High resolution neutron imaging capabilities at BOA beamline at Paul Scherrer Institut

    NASA Astrophysics Data System (ADS)

    Tremsin, A. S.; Morgano, M.; Panzner, T.; Lehmann, E.; Filgers, U.; Vallerga, J. V.; McPhate, J. B.; Siegmund, O. H. W.; Feller, W. B.

    2015-06-01

    The cold neutron spectrum of the Beamline for neutron Optics and other Applications (BOA) at Paul Scherrer Institut enables high contrast neutron imaging because neutron cross sections for many materials increase with neutron wavelength. However, for many neutron imaging applications, spatial resolution can be as important as contrast. In this paper the neutron transmission imaging capabilities of an MCP/Timepix detector installed at the BOA beamline are presented, demonstrating the possibilities for studying sub-20 μm features in various samples. In addition to conventional neutron radiography and microtomography, the high degree of neutron polarization at the BOA beamline can be very attractive for imaging of magnetic fields, as demonstrated by our measurements. We also show that a collimated cold neutron beamline combined with a high resolution detector can produce image artifacts, (e.g. edge enhancements) due to neutron refraction and scattering. The results of our experiments indicate that the BOA beamline is a valuable addition to neutron imaging facilities, providing improved and sometimes unique capabilities for non-destructive studies with cold neutrons.

  10. CAT Guide and Beamline Directory. A key to APS Collaborative Access Teams

    SciTech Connect

    1999-07-08

    The Advanced Photon Source (APS), a national user facility for synchrotrons radiation research, is located at Argonne National Laboratory, approximately 25 miles southwest of Chicago, Illinois. The APS is considered a third-generation synchrotrons radiation facility (specifically designed to accommodate insertion devices to serve as radiation sources) and is one of three such facilities in the world. Currently, it is the most brilliant source in the United States for research in such diverse fields as biology, medicine, materials science, chemistry, geology, agriculture and soil science, physics, and manufacturing technology. Researchers use the APS either as members of Collaborative Access Teams (CATS) or as Independent Investigators (IIs). CATS are responsible for designing, building, and operating beamlines in one or more sectors, each sector consisting of an insertion-device (ID) beamline and a bending-magnet (BM) beamline. Each beamline is designed to accommodate a specific type of research program(s) and is optimized accordingly. CAT members are entitled to use 75% of the available beam time to pursue CAT research goals. The remaining 25% of the available beam time must be made available to IIs. This document was written to help prospective IIs determine which beamlines are suitable for their specific experiments.

  11. Preliminary report: examination of H8 and B8 leadscrews from Three Mile Island Unit 2 (TMI-2)

    SciTech Connect

    Vinjamuri, K.; Akers, D.W.; Hobbins, R.R.

    1985-04-01

    One of the TMI-2 core examination tasks is the analysis of the control rod drive leadscrews, which were removed from the reactor head as part of the July 1982 closed-circuit television inspection of the damaged core. One leadscrew was removed from each of three different core positions: H8, from the center of the core; E9, from approximately midradius; and B8, from near the outer edge. This report presents and discusses the following: leadscrew acquisition, sample types, and analytical techniques used to analyze the various types of samples; results from the visual examination; preliminary leadscrew surface temperature estimates; chemical and radiological analyses; comparisons of temperature estimates and the chemical and radiological behavior in the plenum assembly region; and the principal observations and recommendations made on the basis of this study.

  12. Total and differential cross sections of C3H8 and C3F8 by electron and positron impacts

    NASA Astrophysics Data System (ADS)

    Sueoka, Osamu; Kitajima, Masashi; Sakamoto, Y.; Suzuki, T.; Samukawa, S.; Sueoka, Osamu; Hamada, Akira; Kimura, Mineo

    1998-10-01

    Total and differential elastic cross sections in e-/e+ + C3H8 and C3F8 scattering have been investigated experimentally and theoretically. The differential cross section measurement by electron impact has been carried out from 2 eV to 100 eV, while the total cross section measurement by electron and positron has been for 0.7 eV to 600 eV. The theoretical study has been performed by using the continuum multiple-scattering method. The present total cross sections are found to agree reasonably well with those by Wayne State Univ. group, and theoretical rationale for origins of shape resonances are provided.

  13. Quasi-two-dimensional antiferromagnetism in Fe[S2CNC4H8]2I

    NASA Astrophysics Data System (ADS)

    Lukin, J. A.; Friedberg, S. A.; DeFotis, G. C.; Chamberlain, R. V.

    1993-05-01

    Recent studies of the magnetic susceptibility of powdered Fe[S2CNC4H8]2I confirm that Fe(III) in this salt is in the unusual spin state S=3/2 and that the system behaves as a quasi-2D antiferromagnet. Analysis of the data indicates that the ‖±1/2≳ ground doublet is separated by Δ/k=18.7 K from an excited ‖±3/2≳ doublet. We have now measured the heat capacity of polycrystalline Fe[S2CNC4H8]2I between 0.5 and 80 K in a liquid 3He-cooled calorimeter. CP exhibits a λ-type peak at TN=2.18±0.01 K. The critical entropy, S(TN)=0.25R ln2, indicates that most of the spin order is of a short-range, low-dimensional nature. The contribution of lattice vibrations to CP was estimated using the method of Sorai and Seki [J. Phys. Soc. Jpn. 32, 382 (1972)], which assumes a Schottky contribution from two doublets whose separation Δ was determined from the magnetic data. At the same time, the cooperative peak was reasonably represented by the results for the 2D S=1/2 XY model with Jxy/k=-2.18 K. In order to obtain a self-consistent fit of the lattice heat capacity, however, it was necessary to use a larger splitting (Δ/k=32 K) than that found from susceptibility data. This discrepancy between the doublet-doublet separations indicated by χ and CP measurements may suggest a possible temperature dependence of Δ.

  14. New experimental evidence to support roaming in the reaction Cl + isobutene (i-C4H8)

    NASA Astrophysics Data System (ADS)

    Chen, Li-Wei; Hung, Ching-Ming; Matsui, Hiroyuki; Lee, Yuan-Pern

    2017-01-01

    The reaction Cl + isobutene (i-C4H8) was reported by Suits et al. to proceed via, in addition to abstraction, an addition-elimination path following a roaming excursion of Cl; a near-zero translational energy release and an isotropic angular distribution observed at a small collision energy characterized this mechanism. We employed a new experimental method to further characterize this roaming mechanism through observation of the internal distribution of HCl (v, J) and their temporal behavior upon irradiation of a mixture of Cl2C2O2 and i-C4H8 in He or Ar buffer gas. With 1–3 Torr buffer gas added to approach the condition of small collision energy, the intensities of emission of HCl (v = 1, 2) and the HCl production rates increased significantly; Ar shows a more significant effect than He because Ar quenches Cl more efficiently to reduce the collisional energy and facilitate the roaming path. According to kinetic modeling, the rate of addition-elimination (roaming) increased from kE ≈ 2 × 105 s‑1 when little buffer gas was present to ~1.9 × 106 s‑1 when 2–3 Torr of Ar was added, and the branching ratio for formation of [HCl (v = 2)]/[HCl (v = 1)] increased from 0.02 ± 0.01 for abstraction to 0.06 ± 0.01 for roaming.

  15. New experimental evidence to support roaming in the reaction Cl + isobutene (i-C4H8)

    PubMed Central

    Chen, Li-Wei; Hung, Ching-Ming; Matsui, Hiroyuki; Lee, Yuan-Pern

    2017-01-01

    The reaction Cl + isobutene (i-C4H8) was reported by Suits et al. to proceed via, in addition to abstraction, an addition-elimination path following a roaming excursion of Cl; a near-zero translational energy release and an isotropic angular distribution observed at a small collision energy characterized this mechanism. We employed a new experimental method to further characterize this roaming mechanism through observation of the internal distribution of HCl (v, J) and their temporal behavior upon irradiation of a mixture of Cl2C2O2 and i-C4H8 in He or Ar buffer gas. With 1–3 Torr buffer gas added to approach the condition of small collision energy, the intensities of emission of HCl (v = 1, 2) and the HCl production rates increased significantly; Ar shows a more significant effect than He because Ar quenches Cl more efficiently to reduce the collisional energy and facilitate the roaming path. According to kinetic modeling, the rate of addition-elimination (roaming) increased from kE ≈ 2 × 105 s−1 when little buffer gas was present to ~1.9 × 106 s−1 when 2–3 Torr of Ar was added, and the branching ratio for formation of [HCl (v = 2)]/[HCl (v = 1)] increased from 0.02 ± 0.01 for abstraction to 0.06 ± 0.01 for roaming. PMID:28079173

  16. Stiff-person syndrome (SPS) and anti-GAD-related CNS degenerations: protean additions to the autoimmune central neuropathies.

    PubMed

    Ali, Fatima; Rowley, Merrill; Jayakrishnan, Bindu; Teuber, Suzanne; Gershwin, M Eric; Mackay, Ian R

    2011-09-01

    Stiff Person Syndrome (SPS) is a rare autoimmune neurological disease attributable to autoantibodies to glutamic acid decarboxylase (anti-GAD) more usually associated with the islet beta cell destruction of autoimmune type 1 diabetes (T1D). SPS is characterized by interference in neurons with the synthesis/activity of the inhibitory neurotransmitter gamma amino butyric acid (GABA) resulting in the prototypic progressive spasmodic muscular rigidity of SPS, or diverse neurological syndromes, cerebellar ataxia, intractable epilepsy, myoclonus and several others. Remarkably, a single autoantibody, anti-GAD, can be common to widely different disease expressions, i.e. T1D and SPS. One explanation for these data is the differences in epitope engagement between the anti-GAD reactivity in SPS and T1D: in both diseases, anti-GAD antibody reactivity is predominantly to a conformational epitope region in the PLP- and C-terminal domains of the 65 kDa isoform but, additionally in SPS, there is reactivity to conformational epitope(s) on GAD67, and short linear epitopes in the C-terminal region and at the N-terminus of GAD65. Another explanation for disease expressions in SPS includes ready access of anti-GAD to antigen sites due to immune responsiveness within the CNS itself according to intrathecal anti-GAD-specific B cells and autoantibody. Closer study of the mysterious stiff-person syndrome should enhance the understanding of this disease itself, and autoimmunity in general.

  17. Simulation Studies On The Vertical Emittance Growth At The Existing ATF Extraction Beamline

    SciTech Connect

    Zhou, F.; Amann, J.; Seletskiy, S.; Seryi, A.; Spencer, C.M.; Woodley, M.D.

    2008-06-27

    Significant beam intensity-dependence of the vertical emittance growth was experimentally observed at the Accelerator Test Facility (ATF) at KEK extraction beamline. This paper presents the simulations of possible vertical emittance growth sources, particularly in the extraction channel, where the magnets are shared by both the ATF extraction beamline and its damping ring. The vertical emittance growth is observed in the simulations by changing the beam orbit in the extraction channel, even with all optics corrections. The possible reasons for the experimentally observed dependence of the vertical emittance growth on the beam intensity are also discussed. An experiment to measure the emittance versus beam orbit at the existing ATF extraction beamline is on-going led by the European colleagues.

  18. Validation of source biasing method for its use in CSNS beamline shielding calculation.

    PubMed

    Liang, Tai-ran; Shen, Fei; Liang, Tian-jiao; Yin, Wen; Yu, Quan-zhi; Yu, Chun-xu

    2014-12-01

    The Chinese spallation neutron source (CSNS) is a high-performance pulsed neutron source, having 20 neutron beamlines for neutron scattering instruments. The shielding design of these beamlines is usually needed for Monte Carlo (MC) calculation, and the use of variance reduction methods is critical to carrying out an efficient, reliable MC shielding calculation. This paper discusses the source biasing method based on actual source term and geometry model of a CSNS neutron beamline. Dose distribution throughout the geometry model was calculated with the FLUKA MC code. Full analogue calculation and biased calculation were compared, and it was validated that the source biasing method can effectively promote the calculation efficiency. © The Author 2013. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  19. Thermal, structural, and fabrication aspects of diamond windows for high power synchrotron x-ray beamlines

    SciTech Connect

    Khounsary, A.M.; Phillips, W.

    1992-12-01

    Recent advances in chemical vapor deposition (CVD) technology have made it possible to produce thin free-standing diamond foils that can be used as the window material in high heat load, synchrotron beamlines. Numerical simulations suggest that these windows can offer an attractive and at times the only altemative to beryllium windows for use in third generation x-ray synchrotron radiation beamlines. Utilization, design, and fabrication aspects of diamond windows for high heat load x-ray beamlines are discussed, as are the microstructure characteristics bearing on diamond`s performance in this role. Analytic and numerical results are also presented to provide a basis for the design and testing of such windows.

  20. Experience with Multi-Beam and Multi-Beamline FEL-Operation

    NASA Astrophysics Data System (ADS)

    Rönsch-Schulenburg, J.; Faatz, B.; Honkavaara, K.; Kuhlmann, M.; Schreiber, S.; Treusch, R.; Vogt, M.

    2017-07-01

    DESY’s free-electron laser FLASH provides soft X-ray pulses for scientific users at wavelengths down to 4nm simultaneously in two undulator beamlines. They are driven by a common linear superconducting accelerator with a beam energy of up to 1.25 GeV. The superconducting technology allows the acceleration of electron bunch trains of several hundred bunches with a spacing of 1 microsecond or more and a repetition rate of 10 Hz. A fast kickerseptum system directs one part of the bunch train to FLASH1 and the other part to FLASH2 keeping the full 10 Hz repetition rate for both. The unique setup of FLASH allows independent FEL pulse parameters for both beamlines. In April 2016, simultaneous operation of FLASH1 and FLASH2 for external users started. This paper reports on our operating experience with this type of multi-beam, multi-beamline set-up.

  1. Optical Design of VLS-PGM Soft X-Ray Beamline on Indus-2

    SciTech Connect

    Prasad, T. T.; Modi, M. H.; Lodha, G. S.

    2010-06-23

    The optical design of a soft x-ray beamline on the bending magnet of Indus-2 synchrotron source is presented. A Varied Line Spacing Plane Grating Monochromator (VLS-PGM) was adopted with Hettrick type optics. The VLS-PGM consists of a spherical mirror and three interchangeable gratings of line densities 1200 l/mm, 400 l/mm and 150 l/mm to efficiently cover the energy region 50-1500 eV. The VLS groove parameters were obtained by minimizing defocus aberration, coma and spherical aberration. The overall performance of the beamline was estimated by detailed raytracing calculations. The beamline design, results of the raytracing calculations and the expected performances are presented.

  2. Designing a Beamline Equipment Protection System Using a Programmable Logic Controller

    NASA Astrophysics Data System (ADS)

    Minich, James M.

    1996-09-01

    As part of the Synchrotron Radiation Instrumentation Collaborative Access Team (SRI-CAT), a new beamline equipment protection system was designed, implemented and installed. The beamline equipment protection system is designed to assure the safe operation of bending magnet and insertion device beamline components, such as white-beam slits, user filters, shutters and stops, mirrors and monochromators. Design goals of the equipment protection system were to improve equipment safety performance, reduce nuisance trips and incorporate additional system functions with minimal cost. To meet the requirements of such a safety system, it was configured to use a programmable controller, remote block input/output (I/O), local interfaces and a serial communication link known as remote I/O (RIO). Aspects about the design requirements, functionality and constraints are presented, as well as specifics on programmable ladder logic design, hardware selection, testing and interfacing requirements.

  3. Neutron imaging options at the BOA beamline at Paul Scherrer Institut

    NASA Astrophysics Data System (ADS)

    Morgano, M.; Peetermans, S.; Lehmann, E. H.; Panzner, T.; Filges, U.

    2014-08-01

    The BOA beamline at the Swiss spallation neutron source SINQ at Paul Scherrer Institut is a flexible instrument used mainly for testing novel techniques and devices for neutron scattering and optics, but, due to the large and relatively homogeneous field of view, it can be successfully used for experiments in the field of neutron imaging. The beamline allows also for the exploitation of advanced imaging concepts such as polarized neutron imaging and diffractive neutron imaging. In this paper we present the characterization of the BOA beamline in the light of its neutron imaging capabilities. We show also the different techniques that can be employed there as user-friendly plugins for non-standard neutron imaging experiments.

  4. A double multilayer monochromator for the B16 Test beamline at the Diamond Light Source

    NASA Astrophysics Data System (ADS)

    Sawhney, K. J. S.; Dolbnya, I. P.; Scott, S. M.; Tiwari, M. K.; Preece, G. M.; Alcock, S. G.; Malandain, A. W.

    2011-09-01

    The B16 Test beamline at the Diamond Light Source is in user operation. It has been recently upgraded with the addition of a double multilayer monochromator (DMM), which provides further functionality and versatility to the beamline. The multilayer monochromator is equipped with two pairs of multilayer optics (Ni/B4C and Ru/B4C) to cover the wide photon energy range of 2 - 20 keV, with good efficiency. The DMM provides a broad bandpass / high flux operational mode for the beamline and, when used in tandem with the Si (111) double crystal monochromator, it gives a very high higher-order harmonics suppression. The design details of the DMM and the first commissioning results obtained using the DMM are presented.

  5. A telescope proton recoil spectrometer for fast neutron beam-lines

    NASA Astrophysics Data System (ADS)

    Cazzaniga, C.; Rebai, M.; Tardocchi, M.; Croci, G.; Nocente, M.; Ansell, S.; Frost, C. D.; Gorini, G.

    2015-07-01

    Fast neutron measurements were performed on the VESUVIO beam-line at the ISIS spallation source using a new telescope proton recoil spectrometer. Neutrons interact on a plastic target. Proton production is mainly due to elastic scattering on hydrogen nuclei and secondly due to interaction with carbon nuclei. Recoil protons are measured by a proton spectrometer, which uses in coincidence a 2.54 cm thick YAP scintillator and a 500μm thick silicon detector, measuring the full proton recoil energy and the partial deposited energy in transmission, respectively. Recoil proton spectroscopy measurements (up to Ep = 60MeV) have been interpreted by using Monte Carlo simulations of the beam-line. This instrument is of particular interest for the characterization of the ChipIr beam-line at ISIS, which was designed to feature an atmospheric-like neutron spectrum for the irradiation of micro-electronics.

  6. Soft x-ray spectroscopy undulator beamline at the Advanced Photon Source

    SciTech Connect

    Randall, K.J.; Xu, Z.; Moore, J.F.; Gluskin, E.

    1997-09-01

    Construction of the high-resolution soft x ray spectroscopy undulator beamline, 2ID-C, at the Advanced Photon Source (APS) has been completed. The beamline, one of two soft x ray beamlines at the APS, will cover the photon energy range from 500 to 3,000 eV, with a maximum resolving power between 7,000 and 14,000. The optical design is based on a spherical grating monochromator (SGM) giving both high resolution and high flux throughput. Photon flux is calculated to be approximately 10{sup 12}--10{sup 13} photons per second with a beam size of approximately 1 x 1 mm{sup 2} at the sample.

  7. Mirror and grating surface figure requirements for grazing incidence synchrotron radiation beamlines: Power loading effects

    SciTech Connect

    Hulbert, S.L.; Sharma, S.

    1987-01-01

    At present, grazing incidence mirrors are used almost exclusively as the first optical element in VUV and soft x-ray synchrotron radiation beamlines. The performance of these mirrors is determined by thermal and mechanical stress-induced figure errors as well as by figure errors remaining from the grinding and polishing process. With the advent of VUV and soft x-ray undulators and wigglers has come a new set of thermal stress problems related to both the magnitude and the spatial distribution of power from these devices. In many cases the power load on the entrance slits and gratings in these beamlines is no longer negligible. The dependence of thermally-induced front-end mirror figure errors on various storage ring and insertion device parameters (especially those at the National Synchrotron Light Source) and the effects of these figure errors on two classes of soft x-ray beamlines are presented.

  8. X-ray Optics Testing Beamline 1-BM at the Advanced Photon Source

    SciTech Connect

    Macrander, Albert; Erdmann, Mark; Kujala, Naresh; Stoupin, Stanislav; Marathe, Shashidhara; Shi, Xianbo; Wojcik, Michael; Nocher, Daniel; Conley, Raymond; Sullivan, Joseph; Goetze, Kurt A.; Maser, Jorg; Assoufid, Lahsen

    2016-07-27

    Beamline 1-BM at the APS has been reconfigured in part for testing of synchrotron optics with both monochromatic and white beams. Operational since 2013, it was reconfigured to accommodate users of the APS as well as users from other DOE facilities. Energies between 6 and 28 keV are available. The beamline was reconfigured to remove two large mirrors and to provide a 100 mm wide monochromatics beam at 54 m from the source. In addition a custom white beam shutter was implemented for topography exposures as short as 65 millisec over the full available horizontal width. Primary agendas include both white beam and monochromatic beam topography, Talbot grating interferometry, and tests of focusing optics. K-B mirrors, MLLs, and FZPs have been characterized. Measurements of the spatial coherence lengths on the beamline were obtained with Talbot interferometry. Topography data has been reported.

  9. X-ray optics testing beamline 1-BM at the advanced photon source

    SciTech Connect

    Macrander, Albert Erdmann, Mark; Kujala, Naresh; Stoupin, Stanislav; Marathe, Shashidhara; Shi, Xianbo; Wojcik, Michael; Nocher, Dan; Conley, Raymond; Sullivan, Joseph; Goetze, Kurt; Maser, Jorg; Assoufid, Lahsen

    2016-07-27

    Beamline 1-BM at the APS has been reconfigured in part for testing of synchrotron optics with both monochromatic and white beams. Operational since 2013, it was reconfigured to accommodate users of the APS as well as users from other DOE facilities. Energies between 6 and 28 keV are available. The beamline was reconfigured to remove two large mirrors and to provide a 100 mm wide monochromatic beam at 54 m from the source. In addition a custom white beam shutter was implemented for topography exposures as short as 65 millisec over the full available horizontal width. Primary agendas include both white beam and monochromatic beam topography, Talbot grating interferometry, and tests of focusing optics. K-B mirrors, MLLs, and FZPs have been characterized. Measurements of the spatial coherence lengths on the beamline were obtained with Talbot interferometry. Topography data has been reported.

  10. A low energy monochromator beamline at ELETTRA: conceptual design and scientific aims

    NASA Astrophysics Data System (ADS)

    Cimino, R.; Lama, F.

    2001-07-01

    A beamline using a Low Energy Monochromator Optimized at Normal incidence (LEMON) has been designed to match the bending magnet radiation characteristics of ELETTRA, the third generation source in Trieste. The beamline will use 4×6 mrad 2 of the emitted radiation cone and will be equipped with two interchangeable monochromators: one Normal Incidence Monchromator (NIM) and one Toroidal Grating Monochromator (TGM), both sharing the same focusing optics, entrance and exit slits. The expected performance of the beamline will be a photon energy range from 5 to 200 eV, a resolving power ranging from 100 000 to 500 and a photon flux up to 1×10 11 ph/s/0.1BW on the sample.

  11. High heat load crystal cooling strategies for an APS wiggler beamline

    SciTech Connect

    Beno, M.A.; Knapp, G.S.; Engbretson, M.

    1997-07-01

    High energy wigglers produce extremely high total powers. For example, the insertion device for one beamline of the Basic Energy Sciences Synchrotron Research Center (BESSRC) is an elliptical multipole wiggler (EMPW) which can generate circularly polarized X-rays on axis and produces a total power of {approximately}8 kW. This insertion device will be used to simultaneously provide x-rays to three branch lines, a branch equipped with a normal double crystal monochromator feeding a scattering and spectroscopy station, and two branches with single-bounce horizontally deflecting monochromators for Compton scattering and High Energy Diffraction. The crystal optics for this type of device require substantially different heat load solutions than those used for undulator beamlines. We will discuss how the beam is split and shared among the beamline branch lines and present the crystal cooling strategies employed for both the double-crystal monochromator and horizontally deflecting single-bounce monochromators.

  12. Diamond monochromators for APS undulator-A beamlines

    SciTech Connect

    Blasdell, R.C.; Assoufid, L.A.; Mills, D.M.

    1995-09-01

    There has been considerable interest in the use of diamonds in high heat load monochromators (HHLMs) in the last several years. The superb thermal and mechanical properties of single crystal diamonds serve to minimize distortions caused by a given thermal load, while the low x-ray absorption cross-section reduces both the total power deposited in the crystal as well as the peak (volumetric) power density. The primary obstacle for the widespread use of diamonds at present is a lack of ready availability of perfect single crystals of the desired size and orientation. Although it is possible to obtain near-perfect natural diamonds of the size and orientation required for use on an undulator beamline, the selection process is generally one of trial and error. Near perfect synthetic diamonds can currently be obtained in the minimum necessary size (typically 4-5 mm on a side). A collaborative agreement has been made between the staff of the Advanced Photon Source (APS), the European Synchrotron Radiation Facility (ESRF), and the Super Photon Ring-8 GeV (SPring-8) to explore the use of diamonds as high heat load monochromators and is on-going. One of the avenues of research is to push for improved perfection and size of synthetic diamonds. Sumitomo Electric Corporation of Japan has agreed to work with staff from SPring-8 to grow [100] oriented perfect single crystal diamonds of 10 x 10 x 1 mm{sup 3} size by 1996/1997 (from which one could also cut pieces with the large face parallel to the (111) planes). They have taken the first step in producing an essentially perfect 4 x 4 x 1 mm{sup 3} type II diamond with less than 5 {mu}rad (1 arc second) strain (measured over the entire surface). The authors believe progress in the production of synthetic diamonds, as well as improvement in ties with suppliers of natural diamonds, should make available a relatively large number of high quality diamonds of moderate size within the next several years.

  13. High-brightness beamline for x-ray spectroscopy at the ALS

    SciTech Connect

    Perera, R.C.C.; Jones, G.; Lindle, D.W.

    1997-04-01

    Beamline 9.3.1 at the Advanced Light Source (ALS) is a windowless beamline, covering the 1-6 keV photon-energy range, designed to achieve the goals of high energy resolution, high flux, and high brightness at the sample. When completed later this year, it will be the first ALS monochromatic hard x-ray beamline, and its brightness will be an order of magnitude higher than presently available in this energy range. In addition, it will provide flux and resolution comparable to any other beamline now in operation. To achieve these goals, two technical improvements, relative to existing x-ray beamlines, were incorporated. First, a somewhat novel optical design for x-rays, in which matched toroidal mirrors are positioned before and after the double-crystal monochromator, was adopted. This configuration allows for high resolution by passing a collimated beam through the monochromator, and for high brightness by focusing the ALS source on the sample with unit magnification. Second, a new {open_quotes}Cowan type{close_quotes} double-crystal monochromator based on the design used at NSLS beamline X-24A was developed. The measured mechanical precision of this new monochromator shows significant improvement over existing designs, without using positional feedback available with piezoelectric devices. Such precision is essential because of the high brightness of the radiation and the long distance (12 m) from the source (sample) to the collimating (focusing) mirror. This combination of features will provide a bright, high resolution, and stable x-ray beam for use in the x-ray spectroscopy program at the ALS.

  14. Laser-driven electron beamlines generated by coupling laser-plasma sources with conventional transport systems

    NASA Astrophysics Data System (ADS)

    Antici, P.; Bacci, A.; Benedetti, C.; Chiadroni, E.; Ferrario, M.; Rossi, A. R.; Lancia, L.; Migliorati, M.; Mostacci, A.; Palumbo, L.; Serafini, L.

    2012-08-01

    Laser-driven electron beamlines are receiving increasing interest from the particle accelerator community. In particular, the high initial energy, low emittance, and high beam current of the plasma based electron source potentially allow generating much more compact and bright particle accelerators than what conventional accelerator technology can achieve. Using laser-generated particles as injectors for generating beamlines could significantly reduce the size and cost of accelerator facilities. Unfortunately, several features of laser-based particle beams need still to be improved before considering them for particle beamlines and thus enable the use of plasma-driven accelerators for the multiple applications of traditional accelerators. Besides working on the plasma source itself, a promising approach to shape the laser-generated beams is coupling them with conventional accelerator elements in order to benefit from both a versatile electron source and a controllable beam. In this paper, we perform start-to-end simulations to generate laser-driven beamlines using conventional accelerator codes and methodologies. Starting with laser-generated electrons that can be obtained with established multi-hundred TW laser systems, we compare different options to capture and transport the beams. This is performed with the aim of providing beamlines suitable for potential applications, such as free electron lasers. In our approach, we have analyzed which parameters are critical at the source and from there evaluated different ways to overcome these issues using conventional accelerator elements and methods. We show that electron driven beamlines are potentially feasible, but exploiting their full potential requires extensive improvement of the source parameters or innovative technological devices for their transport and capture.

  15. A next-generation in-situ nanoprobe beamline for the Advanced Photon Source

    NASA Astrophysics Data System (ADS)

    Maser, Jörg; Lai, Barry; Buonassisi, Tonio; Cai, Zhonghou; Chen, Si; Finney, Lydia; Gleber, Sophie-Charlotte; Harder, Ross; Jacobsen, Chris; Liu, Wenjun; Murray, Conal; Preissner, Curt; Roehrig, Chris; Rose, Volker; Shu, Deming; Vine, David; Vogt, Stefan

    2013-09-01

    The Advanced Photon Source is currently developing a suite of new hard x-ray beamlines, aimed primarily at the study of materials and devices under real conditions. One of the flagship beamlines of the APS Upgrade is the In-Situ Nanoprobe beamline (ISN beamline), which will provide in-situ and operando characterization of advanced energy materials and devices under change of temperature and gases, under applied fields, in 3D. The ISN beamline is designed to deliver spatially coherent x-rays with photon energies between 4 keV and 30 keV to the ISN instrument. As an x-ray source, a revolver-type undulator with two interchangeable magnetic structures, optimized to provide high brilliance throughout the range of photon energies of 4 keV - 30 keV, will be used. The ISN instrument will provide a smallest hard x-ray spot of 20 nm using diffractive optics, with sensitivity to sub-10 nm sample structures using coherent diffraction. Using nanofocusing mirrors in Kirkpatrick-Baez geometry, the ISN will also provide a focus of 50 nm with a flux of 8·1011 Photons/s at a photon energy of 10 keV, several orders of magnitude larger than what is currently available. This will allow imaging of trace amounts of most elements in the periodic table, with a sensitivity to well below 100 atoms for most metals in thin samples. It will also enable nanospectroscopic studies of the chemical state of most materials relevant to energy science. The ISN beamline will be primarily used to study inorganic and organic photovoltaic systems, advanced batteries and fuel cells, nanoelectronics devices, and materials and systems diesigned to reduce the environmental impact of combustion.

  16. CLaSPS: A NEW METHODOLOGY FOR KNOWLEDGE EXTRACTION FROM COMPLEX ASTRONOMICAL DATA SETS

    SciTech Connect

    D'Abrusco, R.; Fabbiano, G.; Laurino, O.; Djorgovski, G.; Donalek, C.; Longo, G.

    2012-08-20

    In this paper, we present the Clustering-Labels-Score Patterns Spotter (CLaSPS), a new methodology for the determination of correlations among astronomical observables in complex data sets, based on the application of distinct unsupervised clustering techniques. The novelty in CLaSPS is the criterion used for the selection of the optimal clusterings, based on a quantitative measure of the degree of correlation between the cluster memberships and the distribution of a set of observables, the labels, not employed for the clustering. CLaSPS has been primarily developed as a tool to tackle the challenging complexity of the multi-wavelength complex and massive astronomical data sets produced by the federation of the data from modern automated astronomical facilities. In this paper, we discuss the applications of CLaSPS to two simple astronomical data sets, both composed of extragalactic sources with photometric observations at different wavelengths from large area surveys. The first data set, CSC+, is composed of optical quasars spectroscopically selected in the Sloan Digital Sky Survey data, observed in the x-rays by Chandra and with multi-wavelength observations in the near-infrared, optical, and ultraviolet spectral intervals. One of the results of the application of CLaSPS to the CSC+ is the re-identification of a well-known correlation between the {alpha}{sub OX} parameter and the near-ultraviolet color, in a subset of CSC+ sources with relatively small values of the near-ultraviolet colors. The other data set consists of a sample of blazars for which photometric observations in the optical, mid-, and near-infrared are available, complemented for a subset of the sources, by Fermi {gamma}-ray data. The main results of the application of CLaSPS to such data sets have been the discovery of a strong correlation between the multi-wavelength color distribution of blazars and their optical spectral classification in BL Lac objects and flat-spectrum radio quasars, and a

  17. The SEXTANTS beamline at SOLEIL: a new facility for elastic, inelastic and coherent scattering of soft X-rays

    NASA Astrophysics Data System (ADS)

    Sacchi, M.; Jaouen, N.; Popescu, H.; Gaudemer, R.; Tonnerre, J. M.; Chiuzbaian, S. G.; Hague, C. F.; Delmotte, A.; Dubuisson, J. M.; Cauchon, G.; Lagarde, B.; Polack, F.

    2013-03-01

    SEXTANTS is a new SOLEIL beamline dedicated to soft X-ray scattering techniques. The beamline, covering the 50-1700 eV energy range, features two Apple-II undulators for polarization control and a fixed-deviation monochromator. Two branch-lines host three end-stations for elastic, inelastic and coherent scattering experiments.

  18. Neutron imaging experiments at E-12 beam-line of CIRUS

    SciTech Connect

    Agrawal, Ashish; Kashyap, Yogesh; Shukla, Mayank; Sarkar, P. S.; Sinha, Amar

    2013-02-05

    Neutron imaging beam-line at E-12 beam port of CIRUS reactor India has been developed to implement Neutron tomography, phase contrast imaging and dynamic imaging techniques for various applications. Several experiments on these techniques have been carried out successfully. Neutron radiography and tomography has been used to study blisters formation in pressure tube along with many other applications. Similarly phase contrast imaging has been used to study its feasibility for better contrast in radiographic images. Dynamic imaging has been applied to study the melting of pure and impure lead under heat. In this paper we report the details of various experiments performed at this beam-line.

  19. The X-ray Fluorescence Microscopy Beamline at the Australian Synchrotron

    SciTech Connect

    Paterson, D.; Jonge, M. D. de; Howard, D. L.; Lewis, W.; McKinlay, J.; Starritt, A.; Kusel, M.; Ryan, C. G.; Kirkham, R.; Moorhead, G.; Siddons, D. P.

    2011-09-09

    A hard x-ray micro-nanoprobe has commenced operation at the Australian Synchrotron providing versatile x-ray fluorescence microscopy across an incident energy range from 4 to 25 keV. Two x-ray probes are used to collect {mu}-XRF and {mu}-XANES for elemental and chemical microanalysis: a Kirkpatrick-Baez mirror microprobe for micron resolution studies and a Fresnel zone plate nanoprobe capable of 60-nm resolution. Some unique aspects of the beamline design and operation are discussed. An advanced energy dispersive x-ray fluorescence detection scheme named Maia has been developed for the beamline, which enables ultrafast x-ray fluorescence microscopy.

  20. Design of the First Infrared Beamline at the Siam Photon Laboratory

    SciTech Connect

    Pattanasiriwisawa, W.; Songsiriritthigul, P.; Dumas, P.

    2010-06-23

    This report presents the optical design and optical simulations for the first infrared beamline at the Siam Photon Laboratory. The beamline collects the edge radiation and bending magnet radiation, producing from the BM4 bending magnet of the 1.2 GeV storage ring of the Siam Photon Source. The optical design is optimized for the far- to mid-infrared spectral range (4000-100 cm{sup -1}) for microspectroscopic applications. The optical performance has been examined by computer simulations.