... PHOTOMETERS, ACCEPTABILITY), (*INTERFEROMETERS, ACCEPTABILITY), METEOROLOGICAL INSTRUMENTS, OPTICAL EQUIPMENT ...
DTIC Science & Technology
... Title : ACCEPTANCE LIMITS OF ULTRASONIC TRANSDUCERS FOR ... BEAMWIDTH, SPECTRUM INFLECTION, AND BEAM INFLECTION. ...
... The sum of these four beams gives a pattern with broader beam. ... It depends on the acceptance of ripple within the main beam and the height of ...
... Title : Nuclear Science: DOE's Acceptance of Academy of ... FUSION, LASER APPLICATIONS, PARTICLE BEAMS, CONFINEMENT(NUCLEAR ...
... Title : Engineering Services to Determine Acceptance Limits of Ultrasonic ... center frequency, beamwidth spectrum inflection, and beam inflection. ...
... analytical and experimental studies that were performed to develop and substantiate the design, acceptance, and test ... 27 Beam Loading Geometry . ...
... Beam Angle, Skew Angle, Beam Divergence Angle ... TRANSDUCERS, *ULTRASONIC TESTS, FREQUENCY, ACCEPTANCE TESTS, CONTROL ...
... short to have a sufficiently large acceptance bandwidth for the ... 02U1 with regard to the fundamental driving beam. As a result, the beams overlap in ...
... utilized an electron beam writing instrument to ... SCANNING, FREQUENCY, ACCEPTANCE TESTS, SPATIAL ... FABRICATION, ION BEAMS, LASERS ...
... The technique is particularly useful in systems where the detector acceptance angle limits the beam geometry to relatively collimated beams. ...
... in constrained layers has gained wide acceptance, particularly in the ... implemented with finite element techniques, for damped, laminated beams. ...
... 20 to 25 degree acceptance angle of ... oscillator tube the beam conductance obtained ... COATINGS, ELECTRON BEAMS, MAGNETIC PROPERTIES ...
... applications, and is now gaining acceptance in industry ... is coherent, the recombined beams interfere, and ... called the object or subject beam, the split ...
... fine primary ion beam focus and ... MASS SPECTROMETERS, ACCEPTANCE TESTS, STATE OF THE ART, ION BEAMS, VARIATIONS, COMPUTER ...
... mechanics; finite elements; randomness; beams and plates ... to study the behavior of a beam which is ... matter finally gained universal acceptance as a ...
... also affect the acceptance of such a _sy ... 2 tabulates the measured characteristics of the transmit beams. ... seen that narrowrest and widest beam is 26 ...
Acceptance tests are intended to verify that the hardware design meets requirements. ..... The x-ray beam characteristics such as the energy spread, beam ...
NASA Website
... This parameter is used to calculate the energy spread acceptance, emittance acceptance and other e-beam quality parameters. ...
... 2.14 Lateral joint acceptances for different forms of 226 ... as the joint acceptance and cross acceptance respectively. ... for a nine bay beam exposed to ...
... object beam, ratio of object beam intensity to reference beam intensity, specially ... That study offered very useful data to make acceptance criteria of ...
Holifield Radioactive Ion Beam Facility An Office of Science User Facility What is HRIBF Science Initiatives Accelerators Beams Equipment & Detectors Accepted Experiments Schedule...
Science.gov Websites
... can ine.rease o and thus Increase the real energy acceptance of a ... electron beams through the cavity. Under situations in which the beam would ...
... Title : E-beam Testing and Evaluation ... METHODS, *ELECTRON BEAMS, *FEASIBILITY STUDIES, ACCEPTANCE TESTS, FACILITIES ...
... Page 19. acceptance. ... use a squid'like fiber beam combiner to couple the beams from multiple pump diodes into one, more powerful beam. ...
... include the acceptance angle of the fiber or numerical aperture (NA), the core ... power beams into fibers, since a misaligned beam, one with too ...
Fundamental machine characteristics are covered: acceptance of the machine and mean circulating life; beam dimensions; characteristics of the intersection zone; instability and coherent beam motion; and the Touschek effect.
NASA Astrophysics Data System (ADS)
Longitudinal acceptance of the Spallation Neutron Source superconducting linac is computed with a longitudinal model. Beam Current Monitor and Beam Loss Monitors are utilized in the beam acceptance measurements, and the measured results show close agreement with the model. Based on the ...
Energy Citations Database
In a conventional beam-foil spectroscopy experiment, radiation from an ion beam is viewed by a spectrometer after the beam has passed through a thin foil. The plane of the foil is usually perpendicular to the ion beam, and the radiation accepted by the sp...
National Technical Information Service (NTIS)
Transmissometers always accept a certain portion of the forward scattered light. The error in the beam attenuation coefficient c-lambda due to this acceptance varies with the small angle scattering function, single scattering albedo, and instrumental desi...
We report on computer studies to determine the acceptance of the Electron Beam Ion Source Test Stand (EBTS) at BNL. Knowledge of the acceptance is a useful guide in selecting a source of primary ions, and in designing a transfer line which best matches the primary ion beam to the acceptance of ...
Though linac beam intensity is sufficient (about 15mA) optical beam properties were improved in order to fit the renewed Saturne transverse acceptance with a good factor of security. The low energy beam line located between the preinjector and the linac w...
... 2.6 Acceptance Criteria ... ground, the transducer is placed on the weld surface and moved along the weld axis with the sound beam directed parallel ...
ACCEPTANCE CRITERIA (V). Modulation Index. II. Modulation Index (compounded from the 4RT product, beam shear and wavefront non-uniformity), is one of the ...
An approximate method is described to evaluate the maximum acceptable residual magnetic field in the background of a neutral beam. 5 refs., 8 figs.
... are isolated and evaluated in the I' and Q', Opposing Beams, System Noise ... Brief excerpts from the Radar Acceptance Test logbook are included, to ...
In this work, we present a technique to measure the acceptance of a circular accelerator extending a previous method by the measurement of particle loss. Here, we apply an rf voltage to transversely excite a coasting heavy ion beam in the SIS-18 synchrotron at GSI. The resulting growth of the transverse beam width causes particle loss ...
for a planar waveguide grating cou- pler. Our results show that. by appropriately focusing the incident. Gaussian beam, the acceptance angle of the coupler ...
... representation has received only limited acceptance because of the ... The beams were analyzed with shear-span- to ... Table 1 show the beam size and ...
Jun 16, 2011 ... Description: In this study, glulam beam manufacturers in the United ... A strong marketing campaign could increase the acceptance of these ...
Treesearch
... We have studied H(-) beams from two types of ion ... converging one so that the output beam from the ... can be matched into the acceptance ellipse of ...
... In the 19 July 2007 acceptance letter, one of ... concrete columns and the bottom of the existing beam. ... the walls tributary to the cantilever beams at the ...
... roughly equal amplitudes in all of the-wrong beams. ... occurred which was visible in a beam but invisible ... at-the center of the acceptance region, the ...
... to the total power in the Gaussian beam divided by the beam area at the lI/e ... undergoing acceptance voting by the involved committee members. ...
... degrades due to the finite detector acceptance angle and ... a function of scattering depth, beam energy, and ... with the use of ion beams heavier than ...
... Scanning Laser Beam System Permits Full Format Coverage ... This final report therefore deals with the results of final acceptance testing and how the ...
... the noise in an electron beam with a ... LP transformation equations have gained wide acceptance for the ... problems in the "O t-type electron beams. ...
... angles and the resulting beam nadir angle ... green and infrared scanning beams, and two ... Airborne laser bathymetry -- acceptance grows in 1998/99 ...
... beam tubes, electron beams with mixed properties and the improved low noise conventional TW and BW tubes should find rapid acceptance if the ...
... power (dtendLe) when used with well-collimated narrow beams. ... ter, for acceptance by the Fabry-Perot. The choice of beam expansion fac- ...
... attenuation of airplane response to beam bends, noise ... of the three autopilots to provide acceptance on Category 1 and 2 ILS beams is investigated. ...
... An accepted measure of beam quality from the accelerator ... transverse rms emittance [Ref. 241 ... For extremely relativistic beams, x' corresponds to an ...
... concept of the Elastic Pitch Beam in the ... TAIL HELICOPTER ROTORS, AERODYNAMIC CONFIGURATIONS, ACCEPTANCE TESTS, FLIGHT ...
The cause of lag is primarily the beam acceptance or the time/beam energy required to transfer the information contained in the storage target ...
... 7. Slaughtering building with top beam and column ... not construct the tie beams in accordance ... standards, including any acceptance tests performed ...
... than normal amount of owner acceptance and contractor ... shown outside the cross beam spans (see ... 1) is attached to the cross beams and provides ...
... Thus, the acceptance angle is smaller and consequently more of the power ... The difficulty in measuring beam quality of laser beams exiting fibers ...
... al., 1990, 1991a,b). Such wide acceptance of NITINOL ... dynamic performance of the composite beams will be ... performance of the entire beam will be ...
... of a uniform 4n beam, ,"" = 4,, where n ... are treated as elastic beams for "stiffness ... organizational success and international acceptance of NASTRAN ...
Attempts to measure high electron beam brightness at low values of beam energy are plagued by the effects of space charge forces. These forces can substantially lower the phase space acceptance of various brightness measuring devices. This report consider...
... channel, and difference channel antenna beam pattern characteristics. ... SYSTEMS, *ANTENNA ARRAYS, ACCEPTANCE TESTS, SPECIFICATIONS ...
... of the model was an accelerator with 60 +/-% 5 percent phase acceptance under conditions of central rod potential, angular momentum, and transit ...
... Each beam describes radio frequency emission parameters and (optionally ... model radar systems that involve frequent activation and deactivation of ...
... for Reregistration .....93 Attachment 5. EPA Acceptance Criteria .....97 ... Indoor sites include beams, girders and struts where ...
EPA Pesticide Factsheets
SIM uses an external metrology systems consisting of 14 beam ... the geometry of SIM requires a fiducial with greater angular acceptance to accommodate the ...
... the date on which acceptance testing began at Ball. ..... The autocollimator projects a light beam to a precision mirror mounted on the Master ...
... The outer ring heat complies with SKF material acceptance specifications ... Lz and that the electron beam surface hardening was applied only ...
... THIS OPTICAL SYSTEM PERMITS ACCEPTANCE OF IONS SCATTERED AT 138 ... THE DIAMETER OF THE ION BEAM CAN BE VARIED FROM ...
A general description of the treatment of the Bevatron injection problem is presented, and the programs are described. The program INJECT for the acceptance calculation determines what beam can be accepted into the machine as a coasting beam. The rf trapping calculation, PHASE, tells what ...
... system consists of a commercially available flux gate magnetometer and a single solar cell with a fan-shaped acceptance beam. The computing ...
... The measuring system consists of a commercially available flux gate magnetometer and a single solar cell with a fan-shaped acceptance beam. ...
The design of a large acceptance superconducting toroidal pion channel with solid angle greater than 1 sr and momentum acceptance of several percent is presented. Measurements of characteristics of negative pion production with an electron beam including ...
The longitudinal acceptance of the Spallation Neutron Source superconducting linac is computed with a longitudinal model. A beam current monitor and beam loss monitors are utilized in a new beam acceptance measurement technique, and the measured results show close agreement with the model. ...
A set of two large acceptance (20 to 140 mrad) horns have been designed and built to form a parallel beam of 3 GeV/c pions and kaons for the production of an intense, dichromatic neutrino beam. A set of beam plugs and collimators determined the momentum o...
The low momentum beam described is to be a unique source of antiprotons as well as kaons. The discussion covers (1) choice of production angle; (2) secondary beams; (3) the use of sector dipole magnets for minimizing aberrations; (4) beam bending magnets; (5) beam separators; and (6) beam ...
Studies of beam transport through the planned ORNL 25 MV folded tandem accelerator demonstrate efficient utilization of phase-space acceptance and the feasibility of injecting bunched beams from the tandem accelerator into the Oak Ridge Isochronous Cyclot...
This paper presents theoretical analyses of three subjects pertinent to electron beam experiments. First, a new technique for injecting a beam from a triaxial diode is described, and calculations of the phase space acceptance are shown. Second, the intera...
A method has been developed to analyze the beam dynamics of the radiofrequency quadrupole accelerating structure. Calculations show that this structure can accept a dc beam at low velocity, bunch it with high capture efficiency, and accelerate it to a velocity suitable for injection into a drift tube linac.
The report covers fundamental machine characteristics; acceptance of the machine and mean circulating life; beam dimensions; characteristics of the intersection zone; instability and coherent beam motion; and the Touschek effect. 12 references, 14 figures...
The Beam Delivery System of the ILC has many stringent and sometimes conflicting requirements. To produce luminosity, the beams must be focused to nanometer size. To provide acceptable detector backgrounds, particles far from the beam core must be collimated. Unique beam diagnostics and ...
In the TESLA superconducting linear collider project, collisions occur at zero crossing angle. The option to rapidly dump the spent beams after the collision has been favoured recently to avoid the inconveniencies of large beam losses and beam line activation. For these reasons, the design of the beam and ...
E-print Network
The beam abort system proposed for the Fermilab Tevatron Accelerator will extract the proton beam from the ring in a single turn (approximately 20/mu/s) and direct it to an external beam dump. It is the function of the beam dump to absorb the unwanted beam and limit the escaping radiation to ...
Apparatus for forming and utilizing a sequence of electron beam segments, each of the same temporal length (substantially 15 nsec), with consecutive beams being separated by a constant time interval of the order of 3 nsec. The beam sequence is used for simultaneous inputs to a plurality of wiggler magnet systems that also ...
DOE Information Bridge
The beam attenuation serves as a proxy for particulate matter and is a key parameter in visibility algorithms for the aquatic environment. It is well known, however, that the beam attenuation is a function of the acceptance angle of the transmissometer used to measure it. Here we compare eight different transmissometers with four ...
PubMed
We measured the Tevatron beam admittance by the means of exciting the beam with noise and causing emittance growth. The noise power was about 3W with a bandwidth of 100Hz and centered either in the horizontal betatron frequency or vertical betatron frequency. We were able to controllably blow the beam emittance up quickly. From the ...
We describe a proposed method to funnel ion beams using a new form of the radio-frequency quadrupole (RFQ) structure. This RFQ accepts two bunched ion beams and combines them into a single final beam with interlaced microstructure pulses. It also provides uninterrupted periodic transverse focusing to facilitate the ...
Effects of Axial Magnetic Field on Neutral Beam Etching by Low-Angle Forward-Reflected Neutral Beam; accepted November 2, 2004; published December 17, 2004) A low axial magnetic field was applied using the LAFRN beam system for SF6 gas were investigated. As a result of applying a low axial magnetic
The beam delivery system for the linear collider focuses beams to nanometer sizes at its interaction point, collimates the beam halo to provide acceptable background in the detector and has a provision for state-of-the art beam instrumentation in order to reach the ILCs physics goals. This ...
Beam brightness has been measured experimentally using collimators and emittance selectors. The acceptance of both of these devices must be known to infer a brightness measurement. A computer code has been written to determine the effect of space charge and magnetic field on the acceptance of these devices. The region of validity of ...
The process of channeling of charged particle beams in bent crystals is described, including the effects of angular acceptance, spatial acceptance, normal dechanneling, bending dechanneling, and surface acceptance. Some bending applications that have been tried and future possibilities are reviewed. 29 refs., 30 ...
The vertical acceptance of the Photon Factory storage ring had been limited by a narrow vacuum chamber at an insertion device. To increase the acceptance, the vertical betatron function at the device was reduced. This modification resulted in an increase of the beam lifetime by a factor of 1.5 and enabled one to operate the ring ...
It is shown that the degree of polarization of a beam in electron storage rings can be limited by nonlinear effects. The strength of a nonlinear effect depends on theamplitude of the particles. Particles performing synchrotron and betatron oscillations with high amplitudes can contribute over proportionally to depolarization. As aresult, the emittance of a ...
Arrays of identical polyimide cantilever beams have been fabricated with nickel-chrome strain gauges covering an increasing portion of the beam. In contrast to accepted beam models, testing showed that gauge factor increased 136% for polyimide beams as the strain gauge extended over a larger ...
For injection of beams into circular machines with different horizontal and vertical emittance acceptance, the injection efficiency can be increased if these beams are flat, i.e., if they feature unequal transverse emittances. Generation of flat electron beams is well known and has been demonstrated already in ...
The transverse acceptance of the ATF damping ring, estimated from the beam current decay and the time-dependent vacuum pressure, is smaller than the design value. The authors have measured its dependence on sextupole settings, linear coupling, global orbi...
S1 ACCEPTANCE TEST. 0313. TC 2/3 ISIL DRY RUN. 0307. ASSEMBLY WORK. 1206. ACCEPTANCE CLEANUP. 02 09. TC 2/3/4 PREPS .... RBVM -Radiator Beam Valve Module ...
... Title : Final Acceptance Testing of the Texas Instruments (TI) ASR-8/MTD (AN/GPN ... at a true altitude of 16,300 feet and an active beam antenna tilt of ...
... these accepted procedures is often a prerequisite for acceptance of risk management tools in a regulatory context. ... H. Walter, and L. H. Grimmea. 2003. The BEAM-project: Prediction and assessment of mi...
NBII National Biological Information Infrastructure
For designing high intensity linear accelerators all known effects for emittance increase should be avoided, like mismatch, beam instabilities and reorganization of the particle distribution due to the field energy. In order to have a reasonable accelerating gradient and to avoid instabilities, in many cases the longitudinal acceptance is too small at the ...
Attempts to measure high electron beam brightness at low values of beam energy are plagued by the effects of space charge forces. These forces can substantially lower the phase space acceptance of various brightness measuring devices. This report considers several models for the effects of space charge upon the ...
and, therefore, the beam acceptance" is different for both metals. This allows studies at very low target voltages of only a part of one volt. ...
... in formal species identification and description is gaining acceptance for certain types of biodiversity assessment (Oliver and ... Laboratories 1999). A three-CCD camera incorporates a beam splitter that...
Accepting Proposals for Beam Time at ORNL's HFIR and SNS Facilities Workshops and Events Neutron Powder Diffraction Workshop - August 31 - September 2, 2011 Introduction to the...
... of any of the ship's extreme points can be calculated for any beam and relative ... in intended track and rudder use resulted in the acceptance of fewer ...
The combination of solar energy collectors in synchronous orbit with receiving stations on Earth, linked by microwave power-transmitting beams, could be economic, safe and environmentally acceptable.
... 21 8. Wave Follower System in Operation with the Wave-Slope Sensor ..... 26 9. Sketch of Laser Beam Acceptance Cones . .... 27 10. ...
Devising low-cost strategies to mitigate the effects of the atmosphere on laser- beam propagation has been a key impediment to the acceptance of free-space ...
The medium gain antenna beam is a fan extending from 85 to 95 degrees from the .... and +/- 30 ppm at 3 years following acceptance test for the transponder. ...
Because the beam acceptance limit rilim is a function of altitude and decreases rapidly relative to tilt error reduction, it was found that the localizer ...
A numerical simulation is performed to study the dimensions of the phase and radial acceptance limits in uranium ions of different charge which are accelerated simultaneously.(AIP)
beam acceptance angle. In order to make the measurements, these two components are raised to 15 feet above ground and separated by 500 feet. The amount ...
... is dependent on the aberration coefficient, acceptance angle and specific energy spread (dE/E) of the beam. The aberration ...
May 6, 1994 ... 34BWG1, 34-meter diameter beam waveguide antenna (DSS 24, 34 and 54) .... PAT, Performance Acceptance Test. PBK, Playback ...
Jun 13, 2001 ... These are acceptance-level tests for workmanship. .... This is also an issue for beam testing and cosmic ray testing. ...
ODAS figure of the measured RCS as an object traverses the beam. ...... SNR acceptance threshold effectively was higher than originally expected as a result ...
pinhole cameras which have an instantaneous fan beam acceptance angle of 4? FWHM which extends from the spacecraft spin axis to anti--spin axis. ...
... plays a part in host plant selection and acceptance and in the control of feeding in the ... The stimulus delivery was recorded on the second beam of the oscilloscope. The contaminated air was continuousl...
... use of an ablative radome concept for use with a Ku-band circularly polarized shaped beam ground mapping radar antenna. Acceptance of the ...
... takes into account absorption at the 10 um and 5 Um wavelengths, beam shape and pulse profile. We also examine the angular acceptance of the ...
Devising low-cost strategies to mitigate the effects of the atmospheric on laser beam propagation has been a key impediment to the acceptance of free-space ...
further by a subcommittee of the APS Scientific Advisory Committee; the final decision on acceptance is made by the APS Deputy Director. Although a new BTR must be submitted each...
horizontal width of the east and north beam plots was increased and, ... 45 WS, and AMU) dealing with the Status Report and System Acceptance Test Plan. ...
versions of the Green's function code, when coupled with multiple elastic scattering in terms of acceptance functions (Shavers et al., 1993), showed great ...
... processed in these devices displayed excessive acceptance bandwidths (-10nm) and ... techniques, compelling us to investigate e-beam polling in ...
TO AVCO FOR FINAL ACCEPTANCE AND ASSEMBLY INTO THE SRB BEAM. B. THE ORIGINAL PROBLEM WAS THAT BENNETT HEAT TREATING EXCEEDED THE TIME ...
... Abstract : For today's large acceptance spectrometers, precise knowledge of ... constructed at the Continuous Electron Beam Accelerator Facility ...
Since these data have not been corrected for antenna beam width or for the time ..... an angular acceptance of roughly 10 degrees, and had energy resolution ...
each beam can be calculated from the ground range values in Table 3.1. For stripmap mode, ..... tion of the operational acceptance review, ...
Search Criteria: Search Field: All > Results : All > Search Term: (Beam Acceptance) [x]. Sort results by: NASA Center | Date Added to NTRS | Publication ...
rod limits the beam acceptance. Further increase of the sensitivity re quires a larger instrument where hi, h2 and L are increased in proportion ...
When RHIC is filled with bunches of intense ion beams a pressure rise is observed. The pressure rise exceeds the acceptable limit for operation with the design intensities. Observations of events leading to a pressure rise are summarized. Relevant paramet...
Using a generally accepted model we present a comprehensive analysis (within the page limitation) of an Euler- Bernoulli beam with PZT sensor-actuator and pure rate feedback. The emphasis is on the root locus - the dependence of the attainable damping on ...
acceptance of all detailed action plans in May, as shown in Ex- hibit 3.3-1. ...... box beams. F132. F10.8-2. The current design of the box beam in the ...
A phase control system for the FEL portion of Two-Beam Accelerator is proposed. The control keeps the phase error within acceptable bounds. The control mechanism is analyzed, both analytically in a ''resonant particle'' approximation and numerically in a ...
The beam and shell elements found in many linear elastic finite element codes accept integrated cross sectional properties as input, and produce solutions using classical beam and shell theory. These theories are built upon the equation of resultant force...
Nov 9, 2007 ... NASA photo by Gus Schalkham. Vance Brand accepted the 2007 SpotBeam award Former astronaut Vance Brand of NASA's Dryden Flight Research ...
... free-electron laser was rapidly gaining acceptance as a ... of high-current, low-emittance beams, the result ... Since the optical beam is maintained at a ...
.There is offered a matching device at the input of an accelerator with quadrupole spatial-uniform hiqh-frequency focusing, which removes phase dependence of the accelerator acceptance and essentially reduces the growth of the beam emittance in the accele...
The construction of the ATLAS Positive-Ion Injector (PII) is complete and beam acceleration tests are underway. The PII consists of an ECR ion source, on a high-voltage platform, providing beam to a low-velocity-acceptance, independently-phased, supercond...
Results of a theoretical and experimental study into the variation of coupling efficiency with a grating angle are presented for various beam focusing conditions for an integrated optical grating coupler. The study shows that the acceptance angle of the g...
Photoproduction of(eta) and(eta)(prime) mesons has been studied at the Continuous Electron Beam Accelerator Facility (CEBAF) Large Acceptance Spectrometer (CLAS) using a tagged photon beam incident on a hydrogen target with photon energies from the respec...
Calculations are performed in a kinematic single-particle approximation to describe the beam emittance for the I-100 and MEGAN accelerators.(AIP)
The beam lifetime of the 1.3 GeV storage ring TLS (Taiwan Light Source) at SRRC was studied. Contributions of the gas scattering lifetime and Touschek scattering lifetime were measured. Effects of insertion devices, RF energy acceptance, chromaticity sett...
... Large beam diameters are ad- put ... con- 1064 nm radiation from the 532 nm pump beams. tent reducing the angular acceptance requirements of the ...
...earth that is illuminated by the main beam width of the antenna (which is the angular...distance between half power points of the beam). (iii) Optical intersatellite...drawings. Supporting documentation such as acceptance criteria, and specifications, may...
Code of Federal Regulations, 2010
A set of two large acceptance (20 to 140 mrad) horns have been designed and built to form a parallel beam of 3 GeV/c pions and kaons for the production of an intense, dichromatic neutrino beam. A set of beam plugs and collimators determined the momentum of the particles which pass through the horns. The cooling and ...
The ILC [1] Damping Ring to the Main Linac beamline (RTML) contains three extraction lines (EL). Each EL can be used both for an emergency abort dumping of the beam and tune-up continual train-by-train extraction. Two of the extraction lines are located downstream of the first and second stages of the RTML bunch compressor, and must accept both compressed ...
The possibility of using superconducting magnets on primary and secondary beams is studied both physically and economically. After a description of the magnets (dipoles and quadrupoles) and of the evaluation of their cost, their advantages to shorten beam transports and to reduce their costs are shown. Some special applications on secondary ...
There is a strong interest in physics with radioactive ion beams, which has triggered a number of projects where nuclear physics installations are upgraded with accelerators for low charge state radioactive beams. A survey of the status of these projects is given with emphasis on the low energy linacs, which are limiting the acceptance ...
for the electric field magnitudes rele- vant for the accepted beam parameters and the exponen- tial atmospheresTHE EFFECT OF A SELF-INDUCED ELECTRIC FIELD ON ELECTRON BEAM DIFFERENTIAL SPECTRA IN FLARING, BD7 1DP ABSTRACT The effect of a self-induced electric field on beam elec- tron distributions
An antiproton beam can be polarized in a storage ring by spin-dependent interaction with an internal polarized gas target. This method requires long beam and polarization lifetimes to ensure acceptable beam intensity with a high degree of beam polarization. In this paper relevant properties and ...
This memo describes the physical properties of the currently operating N-Center wide band neutrino beam---commonly called the triplet train, following a past tradition of a triplet lens configuration. In reality, in order to gain a larger momentum acceptance and to minimize the angular divergence of the beam, a quadruplet ...
Current low momentum (about 500 MeV/c) high acceptance (about 5 msr) kaon beam lines feature high ratios of charged contaminant particles to kaons. The results of computer calculations on scattering and pion production from K/sup 0/ /SUB S/ decay are presented to indicate some of the sources of this contamination. Criteria for the design of ...
LAMPF now operates reliably producing 500 mu A of H exp + beam and a few mu A of H exp - beam or 10 nA polarized H exp - beam. Beam loss in the accelerator is quite acceptable at these currents. This level of performance has been achieved through solution...
The construction and operation of the system to transfer the 500 MeV proton beam from the fast cycling booster synchrotron to the main ring are described. The observations of beam properties in the transfer process show that the emittances of the beam extracted from the booster are properly transformed to the ...
A beam transport system for a Heavy Ion Medical Accelerator is presented. The design allows for ease of tuning, similarity of tuning between different beam lines, and future expansion of the number of beamlines. An option for generating secondary beams with acceptable transmission losses to all treatment areas is ...
Fabrication and characterization of microscale sandwich beams Francisco Arias, Paul J.A. Kenis, Cambridge, Massachusetts 02138 (Received 10 July 2000; accepted 20 November 2000) Microscale sandwich beams structurally efficient, lightweight microscale beams and panels. I. INTRODUCTION Sandwich construction
This paper describes the optimization of a variable energy degrader design for the Midwest Proton Radiotherapy Institute (MPRI) (The Indiana University Midwest Proton Radiation Institute, in: Proceedings of the 2001 Particle Accelerator Conference, PAC-2001, Chicago, 2002, p. 645). To optimize the energy degrader design we investigate the choice of an optimal material for the degrader, the ...
Beams consisting of closely spaced bunches, crossing at a small angle, represent the simplest way to achieve high luminosity with a moderate beam current and an acceptable peak event rate without resorting to the use of dipole magnets at, or very close, to the interaction point (IP). The elements of a procedure to derive ...
With the advent of modern fast cycling synchrotrons capable of delivering high intensity heavy ion beams up to uranium, the production of secondary radioactive ion beams (RIBs) with sufficient intensity has become feasible. The basic production mechanism is the fragmentation of near relativistic heavy ion beams on light targets. The ...
A scheme has been developed to produce a well-confined rectangular beam-intensity distribution of greatly enhanced uniformity from initially-peaked intensity distributions such as Gaussian or parabolic distributions without beam scraping. This scheme employs a system of linear and nonlinear transport-line elements. The linear elements prepare the ...
The authors examine beam-cavity interaction physics relevant to mildly relativistic, intense-beam klystron amplifiers. This is an interesting but difficult regime of operation, because of the combination of high beam current and low voltage. The advantage of this regime is that it is relatively easy to access high ...
Longitudinal phase space acceptance amd transverse phase space properties were studied with the proton beam of the alternating-gradient synchrotron linac injector. This was done both with amd without beam bunching preceding the linac. The experimentally observed beam acceptance agrees ...
The installation of the WASA detector at the cooler synchrotron COSY opened the possibility to search for ?-mesic helium with high statistics and high acceptance. A search for the 4He-? bound state is conducted via an exclusive measurement of the excitation function for the dd-->3Hep?- reaction varying continuously the beam momentum around the threshold ...
Scanning film densitometry routinely used for obtaining dosimetric information about therapy treatment beams is subject to several sources of inaccuracies. The most significant of these are described and appropriate methods of testing are presented. This establishes the need for adequate acceptance testing followed by a quality assurance program if these ...
A low current, large bore, epoxy impregnated superconducting quadrupole magnet was constructed at Argonne National Laboratory as a possible prototype for secondary beam use. The quadrupole magnet was placed in the Fermilab P-West High Intensity Area beam for beam quenching tests. Tests were performed by targetting a primary proton ...
A sign-selected dichromatic neutrino beam using conventional magnets presently in use at NAL is described. The beam has a solid angle acceptance of ten mu sr and can focus charged hadrons up to a momentum of 170 GeV/c. The beam can be used to select either neutrinos or anti-neutrinos: when focused for ...
A beam permit module has been developed to concentrate RHIC, subsystem sensor outputs, permit beam, and initiate emergency shutdowns. The modules accept inputs from the vacuum, cryogenic, power supply, beam loss, and superconducting magnet quench detection systems. Modules are located at equipment locations around ...
Requirements are provided for NSLS beam line front ends and vacuum interlocks. Guidelines are provided for UHV beam line vacuum systems, including materials, vacuum hardware (pumps, valves, and flanges), acoustic delay lines and beam line fast valves, instrumentation, fabrication and testing, and the NSLS cleaning facility. Also ...
When a positron`s energy deviation {delta}E/E exceeds the rf acceptance, or when it receives an angular kick for the betatron motion that exceeds some limiting admittance, the positron will be lost. The main contributions to the total beam lifetime come from single Coulomb and Touschek scattering. In this report we investigate the dependence of the ...
When a positron's energy deviation delta E/E exceeds the RF acceptance, or when it receives an angular kick for the betatron motion that exceeds some limiting admittance, the positron will be lost. The main contributions to the total beam lifetime come from single Coulomb and Touschek scattering. In this report we investigate the dependence of the residual ...
A design study has recently been conducted for exploring the feasibility of a relativistic-klystron two-beam accelerator (RK-TBA) system as a rf power source for a 1 TeV linear collider. The author present, in this paper, the beam dynamics part of this study. They have achieved in their design study acceptable transverse and ...
A Von Ardenne type ion source and lens system was developed for use as a preinjector to the 18-Mev strongfocusing linear accelerator. Proton beams of 120 ma at an ion production efficiency of 83% were obtdined. A magnetic beam- confining system was built and a beam of 85 ma was transported 82 inches. The ...
A Von Ardenne type ion source and lens system is developed for use as a preinjector to the 18-Mev strongfocusing linear accelerator. Proton beams of 120 ma at an ion production efficiency of 83% are obtained. A magnetic beam- confining system is built, and a beam of 85 ma is transported 82 in. The beam ...
One of the two ILC Interaction Regions will have a large horizontal crossing angle which would allow to extract the spent beams in a separate beam line. In this paper, the extraction line design for 20 mrad crossing angle is presented. This beam line transports the primary e{sup +}/e{sup -} and beamstrahlung photon ...
The beam transport system for the CEBAF Industrial FEL includes a two-pass transport of the beam with acceleration from injector to wiggler, followed by energy recovery transport from wiggler to dump. From that context, the authors discuss the general problem of multi-pass energy-recovery beam transport for FELs. Tunable, ...
Electronic laser beam profiling is now a widely accepted method to measure the mode quality and spatial profile of a laser beam. For the most part, profiling has been limited to the unfocused or 'raw' beam, because the energy density or irradiance in the vicinity of focus is high enough to destroy almost any ...
The Argonne Tandem uses Pelletron chains, NEC accelerator tubes, and a dual closed-corona system. Its main function is to be an injector for a superconducting linear accelerator. As long as the transverse and longitudinal emittances are within the acceptance of the linac, the output beam quality of the tandem-linac system is essentially determined by the ...
The results of atomic beam production studies are presented. Improved cooling of the atoms before jet formation in the dissociator cold nozzle apparently reduces the atomic beam velocity spread and improves beam focusing conditions. A carefully designed sextupole separating (and focusing) magnet system takes advantage of the high ...
The transverse acceptance of the ATF damping ring, estimated from the beam current decay and the time-dependent vacuum pressure, is smaller than the design value. The authors have measured its dependence on sextupole settings, linear coupling, global orbit distortions, local orbit bumps, rf frequency, rf voltage, and on the working point in the tune ...
The acceptance of lattice A (6.5 T) of the SSC Reference Designs Study is determined for ten different sets of random errors as various multipole orders are set to zero. On the basis of 400 turn studies it is concluded that all multipole orders in the dipoles are important. Further studies show that the beam crossing dipoles limit the ...
We present results on the acceptance, trigger efficiencies and resolutions expected for bottom events produced by a 900 GeV proton beam on a fixed target. Also examined is the question of a central hole in such a detector, its impact on acceptance and radiation damage. 4 refs., 3 figs.
A large acceptance mass separator (LAMS) is presented; it is characterized by its large acceptance (up to 100 (pi) mm.mrad) and its simplicity. It is well suited to the beams of low energy spread which are given by the ECR ion sources and its insertion in...
Project-X is the proposed high intensity proton facility to be built at Fermilab, US. Its Superconducting Linac, to be used at first stage of acceleration, will be operated in continuous wave (CW) mode. The Linac is divided into three sections on the basis of operating frequencies & six sections on the basis of family of RF cavities to be used for the acceleration of beam ...
The possibility of achieving the high muon fluxes suggested in recent work on muon colliders has revived interest in the idea of using muon storage rings for neutrino production. Through proper design of the lattice, a significant fraction of the stored muons can be converted into an intense, low-divergence beam of neutrinos. This work examines the incorporation of a long, ...
Colliding round, rather than flat, beams promises to more than double the luminosity of electron-positron colliders. In simulations, round beams have been capable of producing large tune shifts, much greater than produced by flat beams, with acceptable beam blowup. The purpose of this work was ...
An upgrade program is being carried out at Los Alamos to increase the peak beam current from the present H{sup {minus}} injector to provide 200 {mu}A average current for the proton storage ring at LANSCE. In order to meet this objective, the injector must provide at least 30% more current than presently available. More optimal operation however, requires a factor of two higher ...
The redesign of the transition region (TR) that functions as a transport section for the H/sup +/ and H/sup -/ beams between the LAMPF 201.25-MHz drift-tube (DT) and 805-MHz side-coupled (SC) linacs providing a 7.98 cm longer flight path for one beam so that both beams have the correct phase for capture in the SC linac is described. In ...
A low current, large bore, epoxy impregnated superconducting quadrupole magnet was constructed as a possible prototype for secondary beam use. Beam quenching tests were performed by targetting a primary proton beam directly onto the quadrupole coil and by using the quadrupole in its anticipated role as part of the first stage flux ...
European effort on charge breeders is mainly dedicated to present and future Radioactive Ion Beam facilities. The main projects are High Intensity and Energy-ISOLDE at CERN, SPIRAL2 at GANIL, and EURISOL. Most of the experimental developments are funded by the European programs EURONS (European Nuclear Structure) and EURISOL (European Isotope Separation On-Line Radioactive Ion ...
Over the last few years several upgrades have been built and commissioned at LAMPF. In addition two new facilities have been proposed. In particular, new facilities exist using the polarized beam, including a new intense optically pumped ion source beam, a neutron time-of-flight facility, and a medium-resolution spectrometer. A superconducting rf buncher ...
A 30 K polarized atomic beam source has been designed and tested under contract for a commercial manufacturer** NTG Neue Technologien GmbH u Co.KG, 6460-Gelnhausen-Hailer, Germany. . In order to optimize the dissociator and the sextupole system, a simple method for measuring the ...
robot, the Beam Assembly Tele- operator (BAT), was designed around those same assembly tasks on the tip of the beam accepts the node's T-shaped connector. (c) The Ranger robot in this scenario. The complete assembly sequence consists of six steps. The leg first moves to position the arm near the beam
#12;Ingredients of a Neutrino Factory � Proton Driver � ~8 GeV protons � Target, Capture � � � Drift/Buncher solenoid � Drift and � � Progressively increase rf voltage to bunch beam � Rotate bunches � align to equal energies � Cool the beam � Purpose of FE: Reduce beam phase-space volume to meet the ...
Beam divergence and waist measurements of laser diodes by near-field scanning optical microscopy W�schlikon, Switzerland Received 23 August 1996; accepted for publication 3 December 1996 We demonstrate the use of near-field in the transverse plane at near field and as a function of distance from the facet. The divergence of the laser ...
This paper introduces a new method for stacking beams in the longitudinal phase space. It uses RF barriers to confine and compress beams in an accelerator, provided that the machine momentum acceptance is a few times larger than the momentum spread of the injected beam. This is the case for the Fermilab Main ...
with an additional insert made of Hevimet for shaping the beam pro#12;le. The thickness was determined so as to stop, and is an assembly of 22 plastic scintillating counters. K + and #25; + beam pro#12;les were obtained in coincidence minimized systematic errors while maintaining high acceptance. Key words: Separated stopped K ...
