Operational and accidental beam losses in hadron colliders can have a serious impact on machine and detector performance, resulting in effects ranging from minor to catastrophic. Principles and realization are described for a reliable beam collimation sys...
National Technical Information Service (NTIS)
A scraper/collimation system is required to localize the beam loss in the Collider of the Superconducting Super Collider to a few predefined locations and by doing so to minimize the irradiation of superconducting magnets, to sustain favorable background conditions in the Interaction Regions (IR), and to reduce the impact of radiation on other equipment, ...
Energy Citations Database
Energy deposition issues are extremely important in the Very Large Hadron Collider (VLHC) with huge energy stored in its 20 TeV (Stage-1) and 87.5 TeV (Stage-2) beams. The status of the VLHC design on these topics, and possible solutions of the problems are discussed. Protective measures are determined based on the operational and accidental ...
DOE Information Bridge
The effect of possible accidental beam loss in the LHC on the IP5 and IP6 insertion elements is studied via realistic Monte Carlo simulations. The scenario studied is beam loss due to unsynchronized abort at an accidental prefire of one of the abort kicker modules. ...
The effect of possible accidental beam loss in LHC on the IP5 insertion elements and CMS detector is studied via realistic Monte Carlo simulations. Such beam loss could be the consequence of an unsynchronized abort or � in worst case � an accidental prefire of one ...
The effect of possible accidental beam loss in LHC on the IP5 insertion elements and CMS detector is studied via realistic Monte Carlo simulations. Such beam loss could be the consequence of an unsynchronized abort or ? in worst case ? an accidental prefire of one of ...
Shielding estimates for the Advanced Photon Source (APS) have been computed utilizing presently available design parameters. Calculations of the resulting radiation fields have been made for several considerations involving normal beam loss, as well as for certain postulated accidental beam ...
The consequences of an accidental beam loss in superconducting accelerators and colliders of the next generation range from the mundane to rather dramatic, i.e., from superconducting magnet quench, to overheating of critical components, to a total destruction of some units via explosion. Specific measures are required to minimize and ...
Dealing with beam loss due to abort kicker prefire is considered for hadron colliders. The prefires occurred at Tevatron (Fermilab) during Run I and Run II are analyzed and a protection system implemented is described. The effect of accidental beam loss in the Large Hadron Collider (LHC) at ...
A high beam power in the proposed Fermilab Proton Drivers--1.2 MW in 16-GeV PD-I and 0.48 MW in 8-GeV PD-II--implies serious constraints on beam losses in these machines. Only with a very efficient beam collimation system can one reduce uncontrolled beam losses in the ...
>The inverse opposing field method depends on the measurement oi the charge carrier beam reflected by an opposing field and permits the measurement of integral energy distributions. Its advantage with respect to the usual opposing field methods consists in the low sensitivity for accidental current oscillations in the region of interest and the ...
Bulk shielding was designed for the proposed Argonne Advanced Photon Source. The shielding is for two linacs, the positron converter, booster synchrotron, and the storage ring. Shielding design limits exposure to 20 mrem/wk for occupational and 25 mrem/y for an individual member of the public from the radiation products, which include high energy neutrons (HEN), giant resonance neutrons (GRN), and ...
The primary goal of ATLAS Beam Condition Monitor (BCM) and Beam Loss Monitor (BLM) is to protect the ATLAS Inner Detector against damaging LHC beam incidents by initiating beam abort in case of beam failures. Poly-crystalline Chemical Vapour Deposition (pCVD) diamond was ...
NASA Astrophysics Data System (ADS)
Beam transport programs are widely used to estimate the distribution of power deposited in accelerator structures by particle beams, either intentionally as for targets or beam dumps or accidentally owing to beam loss incidents. While this is usually adequate for ...
E-print Network
A detailed analysis of machine-induced backgrounds (MIB) in the LHC collider detectors is performed with focus on origin and rates for three sources: tertiary beam halo, beam-gas interactions and kicker prefire. Particle fluxes originating from these operational and accidental beam losses are ...
The radiation transport analysis in the proposed Fermi-lab 1.2 MWProton Driver (PD) [1] is fundamentally important because of the impact on machine performance, conventional facility design, maintenance operations, and related costs. The strategy adopted in the PD design is that the beam losses in the machine are localized and controlled as much as ...
Beam transport programs are widely used to estimate the distribution of power deposited in accelerator structures by particle beams, either intentionally as for targets or beam dumps or accidentally owing the beam loss incidents. While this is usually adequate for ...
Superconducting magnets for accelerators can be accidentally quenched by heat resulting from beam losses in the magnet. The threshold for such quenches is determined by the time structure of the beam loss and by details of the magnet application, construction and cooling. A 4.25 m long ...
Due to rapid progress with the LHC commissioning in 2010, set-up beam intensities were soon surpassed and damage potential was reached. One of the key systems for machine protection is the beam loss monitoring (BLM) system. Around 4000 monitors are installed at likely or critical loss locations. Each monitor has ...
... AD-A253 677 ACCIDENTAL OIL SPILI"4-N,-- ... I and the remaining oil levels in the tank were measured and oil loss was calculated. ...
DTIC Science & Technology
Radiation issues of high-luminosity 2 x 2 TeV and 250 x 250 GeV {mu}{sup +}{mu}{sup -} colliders are considered. A series of dedicated simulations have been performed with the MARS code to understand formation of radiation fields in the complex and to assure that there are ways to meet the stringent regulation requirements. Considered in detail are the main collider arcs, the interaction region ...
A set of calculations performed with the MARS15 code indicates a maximum radiation dose due to muons in the C0 Assembly Building (C0 AB) for a person standing on a ladder in the orbit plane of the Tevatron of 10 mrem and a maximum dose for a person standing on a C0 AB floor < 1 mrem per loss of 2.5 x 10{sup 13} protons of 1 TeV energy in the Tevatron.
Ocular injuries resulting from exposure to laser beams are relatively uncommon since there is normally a low probability of a relatively small-diameter laser beam entering the pupil of an eye. This has been the accident experience to date with lasers used in the research laboratory and in industry. A review of the accident data suggests that at least one ...
... Descriptors : *STRUCTURES, *BLAST, *STEEL, *BEAMS(STRUCTURAL), *COLUMNS(SUPPORTS), *CONCRETE, ACCIDENTS, ASYMMETRY ...
During the accelerator studies period of 12/90-1/91 much study time was dedicated to improving the E760 deceleration ramps. 4 general goals were in mind: (1) Reduce the relative orbit deviations from the nominal reference orbit as much as possible. This reduces the potential error in the orbit length calculation - which is the primary source of error in the beam energy ...
Operational and accidental beam losses in hadron colliders can have a serious impact on machine and detector performance, resulting in effects ranging from minor to catastrophic. Principles and realization are described for a reliable beam collimation system required to sustain favorable background conditions in ...
... led to accidental spin-up of the spacecraft and loss of attitude control gas . ..... SURVEY" Identifies the producer organization of this data product. ...
NASA Website
The radiation protection program at the Superconducting Super Collider Laboratory is described. After establishing a set of stringent design guidelines for radiation protection, both normal and accidental beam losses for each accelerator were estimated. From these parameters, shielding requirements were specified using Monte-Carlo ...
Laser application in different sectors of technology, science and medicine is broadened which has caused an increase in the range of specialists related to production, adjustment and operation. It is found that the biological effect of laser radiation on man affects primarily the eyes. It is shown that infractions of safety rules when working with lasers causes eye damage which varies in severity ...
The properties of continuous-variable teleportation of single-photon states are investigated. The output state is different from the input state due to the non-maximal entanglement in the EPR beams. The photon statistics of the teleportation output are determined and the correlation between the field information ? obtained in the teleportation process and the change in photon ...
... Problem Loss of foveal vision from disease or accidental exposure to bright light seriously impairs visual functions like reading and visual search. ...
... Abstract : Loss of the central visual field, or foveal scotoma, due to accidental exposure to laser light or macular disease can cause serious ...
The High Energy Beam Transport (HEBT) and Ring to Target Beam Transport (RTBT) lines of the Spallation Neutron Source (SNS) include collimation systems that protect the line itself, as well as the systems downstream. Due to the one-pass mechanism in a transfer line, collimation can only provide protection against accidental ...
After discussing the general theory of power loss in beam pipes, the paper works out the power loss specifically for cold sections of beam pipe.
... Beam and Filter Straddle Losses in an ESA Search Radar ... 5. FUNDING NUMBERS Beam and Filter Straddle Losses in an ESA Search Radar ...
... The losses include transmission line losses, mismatches in the feed, and the coupling losses if multiple beams are formed. 37 Page 49. 6.5 56- ...
An equation is derived for calculating the radioactivity of a source from the results of coincidence counting, taking into account dead-time losses and accidental coincidences. The corrections allow for the extension of the set dead time in the (beta) cha...
Monte Carlo calculations were performed to estimate the tritium production in groundwater around the Linear Accelerator (Linac) and the Low Energy Booster (LEB) tunnels at the Superconducting Super Collider Laboratory (SSCL). The calculations were performed using the new version of the Los Alamos High Energy Transport (LAHET) code system (SUPERHET). Most of the tritium activity was found to occur ...
The beam-loss-monitors (BLMs) in the HERA-Proton-ring (HERAp) must fulfil the following requirements: They have to measure losses sensitive and fast enough to prevent the superconducting magnets from beam loss induced quenching; the dynamic range of the m...
... least 7% for beams with bonded tendons. ... loss, type of tendon, time variation ... Descriptors : *STRUCTURAL COMPONENTS, *CONCRETE, *BEAMS ...
This report discusses: energy deposition and radiation shielding in antriproton source at FNAL; radiation issues/problems at RHIC; radiation damage to polymers; radiation effects on optical fibre in the SSC tunnel; capabilities of the Brookhaven Radiation Effects Facility; the SSC interaction region; the FLUKA code system, modifications, recent extension and experimental verification; energy ...
... Title : The Beam-Density Effect on Energy Loss of a Relativistic Charged Particle Beam. Descriptive Note : Final rept. for FY83,. ...
The environmental radiation shielding requirements of the SSC have been evaluated using currently available computational tools that incorporate the well known processes of energy loss and degradation of high energy particles into Monte Carlo computer codes. These tools permit determination of isodose contours in the matter surrounding a source point and therefore the ...
... species, such as accidental capture in fishing gear, ocean sound, ship strikes, and habitat loss. In addition, marine mammals may have an effect on human activities or property. NMFS, in collaboration with...
NBII National Biological Information Infrastructure
... Loss of foveal vision from disease or accidental exposure to bright light seriously impairs visual functions like reading and visual search. ...
... Abstract : Loss of central visual field, or foveal scotoma, due to accidental exposure to laser light or macular disease can cause serious impairments ...
The unprotected human eye is extremely sensitive to laser radiation and can be permanently damaged from direct or reflected beams. Two cases of retinal injury by laser exposure outside hospital setting are reported. Two patients presented in retina clinic in Al-Bahar eye center in Kuwait with complaints of decrease in vision following exposure to unknown light. Case 1 was ...
PubMed
Dead-time losses which occur in connection with pulsed beams differ from the losses which occur for continuous beams. Some statistical distributions are given which are useful for the calculation of the losses, and approximate formulas are given for some cases which arise frequently. ...
The Beam Scraping Monitor (BSM) is used to detect small amounts of beam loss in Jefferson Lab's Continuous Electron Beam Accelerator Facility (CEBAF). The BSM acts as an early warning system that alerts CEBAF operators when the beam loss exceeds 10 to 20 ...
A reference design study for a Mirror Fusion Hybrid Reactor has been completed which examines the tritium handling problems. Breeding pins composed of aluminum alloys contain lithium hydride with a four-year residence time for tritium production. The slip-stream helium tritium capture system is designed to handle a 0.1 percent pin failure and will reduce environmental losses ...
Properties of the disrupted NLC beam at the Interaction Point (IP) and particle loss in the extraction line are analyzed as a function of beam-to-beam position and angular offset at IP. The simulations show that disruption and beam loss maximize when the vertical beam ...
PROOF OF LOSS � ACCIDENTAL DEATH HARTFORD FIRE INSURANCE COMPANY HARTFORD LIFE INSURANCE COMPANY HARTFORD LIFE AND ACCIDENT ISURANCE COMPANY Name of Policyholder Policy Number Name of Insured Address understand that this authorization is valid for a period of one year. I know that I may request to receive
10 Energy 2 2011-01-01 2011-01-01 false Reports of accidental criticality or loss of special nuclear material. 72.74 Section 72.74 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSING...
Code of Federal Regulations, 2011
This paper describes the design and implementation of a beam loss accounting system for the CEBAF electron accelerator. This system samples the beam curent throughout the beam path and measures the beam current accurately. Personnel Safety and Machine Protection systems use this system to turn ...
Loss of the central visual field, or foveal scotoma, due to accidental exposure to laser light or macular disease can cause serious impairments in visually guided performance by either long lasting afterimages from visible radiation or permanent or degene...
The CEBAF accelerator delivers a CW electron beam at fundamental 1497 MHz, with average beam current up to 200 (mu)A. Accurate, stable nonintercepting beam current monitors are required for: setup/control, monitoring of beam current and beam losses for ma...
It is anticipated that radiation heating due to beam loss may place severe constraints on the operation of high energy accelerators which utilize superconducting magnets. Losses on ejection septa, assuming an unbunched beam mode of operation, are unavoida...
Beam-Loss Monitors (BLM) are used with each accelerator in the Superconducting Super Collider complex. The primary purpose of these detectors is to protect the accelerators from damage due to the loss of protons. Although the range of primary beam energie...
During the past 40 years a wide body of biomedical research has been conducted to understand the factors which influence injury to optical radiation-particularly with respect to the eye. A primary motivation for much of this research has been the advent of lasers, since focal damage of the retina from a collimated beam exposure is possible at some distance. A wide range of ...
Legal entanglements prevent publication of details on most laboratory and industrial laser accidents in the USA. Many macular injuries involving the fovea show no signs of recovery after several years. Both single eye (usually the dominant one) and binocular exposures are found usually resulting in large deficits in visual performance. The primary lesion is rarely, if ever, centered in the fovea, ...
A fast instability with beam loss is observed in the Los Alamos Proton Storage Ring (PSR) when the injected beam current exceeds thresholds, with both bunched and unbunched beams. Large coherent transverse oscillations occur before and during beam loss. R...
Beam diagnostic ion chambers are used throughout the SLC to perform a variety of tasks including locating beam losses along the beam direction, determining localized losses from individual bunches in a multibunch beam, and detecting scattered particles fr...
Niobium superconducting rf cavities are proposed for use in the proton LINAC accelerators for spallation-neutron applications. Because of accidental beam loss and continual halo losses along the accelerator path, concern for the degradation of the superconducting properties of the cavities with accumulating damage ...
Niobium superconducting rf cavities are proposed for use in the proton LINAC accelerators for spallation-neutron applications. The potential for accidental beam loss and continual halo losses along the accelerator path cause concern for the degradation of the superconducting properties of the cavities with the ...
... TRANSFER, *UPPER ATMOSPHERE, *PARTICLE BEAMS, DENSITY ... LAUNCHING, IONIZATION, LOSSES, ATMOSPHERES, ATMOSPHERIC ...
... PRESSURE, CHARGED PARTICLES, TARGETS, MONTE ... IONIZATION, FOCUSING, LOSSES, CHANNELS ... LOW ALTITUDE, PARTICLE BEAMS ...
Large hadron accelerators (existing and planned) can have enough stored beam energy to have dangerous effects on the accelerator and its environment in case of uncontrolled beam losses. This report will give examples of different kinds of beam losses together with the response of the ...
... Accession Number : ADA108287. Title : Simple Analysis of Light Ion Beam Losses in Deuterium Plasma Channels. Descriptive ...
... at the cost of some loss of ion beam efficiency. However, the loss is not ... Left unresolved is the connection (if any) between the presumed anode ...
A scraper/collimation system is required to localize the beam loss in the Collider of the Superconducting Super Collider to a few predefined locations and by doing so to minimize the irradiation of superconducting magnets, to sustain favorable background ...
... Accession Number : ADA250878. Title : Beam and Filter Straddle Losses in an ESA Search Radar. Descriptive Note : Technical rept. ...
The article is devoted to results of fine time structure of particle losses in Tevatron with use of fast beam loss monitors (BLM) based on PIN-diodes. An ultimate goal of the new BLMs is to distinguish losses of protons and antiprotons from neighbor bunch...
Program for estimation of the beam losses of light ions due to interaction with the residual gas has been written. The loss of beam intensity is determined by the cross sections for loss processes respecting different ion energies and depends on the pressure of the residual gas. The ...
the ERL, see Fig. 1a, indicate the beam acceleration/deceleration in the linacs. Plateaus seen at 2 beam loss density up to 10pA/m and radiation power of 50mW/m. At the end of deceleration, beam loss of beam particles in storage ring", Soviet Atomic Energy Journal, 22, ...
... The largest single loss within the beam waveguide resonator was due to the coupling holes. When the coupling hole loss ...
... Title : RESULTS OF LOSS FACTOR MEASUREMENTS ON STEEL AND CONCRETE BEAMS USING A VISCOELASTIC OR SAND DAMPING ...
... Each of these stages results in power losses that are thoroughly examined, allowing for the calculation of the likely amount of power delivered. ...
... measurements the photon loss coefficients in ... GALLIUM ARSENIDES, PHOTONS, PUMPING ... ELECTRONICS), ELECTRON BEAMS, ELECTRON ...
The LAMPF II accelerator will require sufficient vacuum to prevent beam loss or beam blowup within the time the beam is in the accelerator. Because this time is quite short (tau
... Beam ... beams. 33 ... Figure 3. Pitch angle distribution showing the three components of the distribution: loss cone component, halo component, and ...
The cryocondensation pumping system for the TFTR neutral beam injectors is described. Topics include hardware design, differential pumping and beam loss, operational modes, and response to massive vacuum breaks.
... (WPI) provided easy control of the pumping power to ... order to ensure that the two pump beams are of ... reflected beam to counter losses in the beam ...
A fast tracking technique for doing beam tail simulations has been applied to a study of beam-beam effects in the SLAC/LBL/LLNL PEP-II B Factory. In particular, the dependence of beam lifetime and particle density distribution due to vacuum pressure, damping times, machine nonlinearity and parasitic crossings has been analyzed. Effects ...
A case of an accidental exposure to a high intensity Q-switched infrared laser beam is described. A paramacular burn, splinter hemorrhages on the disc margin, and vitreous hemorrhage were the initial findings. Later, a paramacular pucker developed, causing reduction in visual acuity to 6/12. Microvascular accident on the disc margin is assumed to be the ...
A transverse damping system is used in the Recycler at Fermilab to damp beam instabilities which arise from large beam intensities with electron cooling. Initial tests of electron cooling demonstrated beam loss due to transverse beam motion when the beam ...
Beam diagnostics at high-intensity facilities feature their own special set of problems and characteristics. Issues peculiar to high-intensity storage rings include beam loss, beam halos, extraction efficiency, beam in the gap, clearing electrodes, and be...
...criticality or loss of special nuclear material. 72.74 Section 72...HIGH-LEVEL RADIOACTIVE WASTE, AND REACTOR-RELATED GREATER THAN CLASS...or loss of special nuclear material. (a) Each licensee shall...any loss of special nuclear material. 1 Commercial...
Code of Federal Regulations, 2010
A slow, linear pressure rise in the drift ducts of the PLT neutral beam systems, and the resulting reionization losses of neutral beam power, are reported and examined. A model is developed for the reionization losses, based on the observed test stand pressure rise and an additional pressure rise due to the ...
A criteria to optimize the beam spacing, in azimuth and in elevation, for a surveillance phased array radar with the electronic beam steering capability is provided. Two loss factors are defined: the Beam Packing Loss (BPL) and the Beam Shape Loss ...
The beam-beam interaction is one of the dominant sources of emittance growth and luminosity lifetime deterioration. A current carrying wire has been proposed to compensate long-range beam-beam effects in the LHC and strong localized long-range beam-beam effects are experimentally investigated in the RHIC collider. Tune shift, ...
... a. Channel "b. Recess v.Ring d. Complete cover - used where avoitc'w-i accidental activation is of primary importance. ... Low Beam 4. Radio 21. ...
... TRANSMISSION THROUGH A FRUSTRATED-TOTAL-REFLECTION DEVICE BY ... LOSSES AND DIFFRACTION OF THE OPTICAL BEAM BY THE ...
The energy loss of a highly relativistic beam transported in an evacuated pipe of finite conductivity is calculated.
The theory of dynamic vacuum pressure evolution in heavy-ion accelerators in presence of beam losses is discussed. Some particular cases are considered in more detail: average pressure evolution, steady-state vacuum pressure profile with account of beam losses, and pressure bumps induced by particle ...
... MATHEMATICS), IMAGES, LOSSES, ELASTIC SCATTERING, ENERGETIC PROPERTIES, PARTICLE TRAJECTORIES, UNITED KINGDOM. ...
Particle losses in scattering were previously calculated for ordinary and strong-focusing accelerators. However, losses for adiabatic beam compression were not accounted for. The problem of beam losses, considering the adiabatic beam compression in a spherical ...
. The laser itself is mounted on an optical bench welded to the telescope fork. Relay optics reflect the beam. Cherry Av., Tucson, AZ 85721 ABSTRACT Laser beams directed into the sky from astronomical observatories. Detection systems are needed to sense aircraft and interrupt the laser beam to prevent accidental
A study of the beam distributions in the 2 mrad and 14/20 mrad extraction lines are presented. Beam losses, energy losses due to synchrotron radiation and spin diffusion are shown. Synchrotron radiation distributions generated by the beam as it traverses ...
Diffusion equation is used to evaluate the beam loss in the presence of aperture limitation resulting from the intrabeam scattering. We discuss the effect of different boundary conditions. Satisfactory beam intensity can be maintained within the proposed RHIC operation time.
Diffusion equation is used to evaluate the beam loss in the presence of aperture limitation resulting from the intrabeam scattering. We discuss the effect of different boundary conditions. Satisfactory beam intensity can be maintained within the proposed ...
. If there is a covered dependent child, your spouse's Principal Sum will equal 50% of your Principal Sum. REHABILITATION BENEFIT Reimburses covered rehabilitation expenses, the lesser of 10% of the Insured's Principal Sum% Loss of thumb and index finger of same hand 25% Quadriplegia 100% Paraplegia 75% Hemiplegia 50% "Member
possible migration of radionuclides due to the chronic or accidental loss either from the pits for solid .... ported in other articles already published or in press. ... absorbing certain radionuclides under well-defined conditions and ...
Organophosphate (OP) compounds comprise a major class of chemicals used as insecticides, primarily by agricultural workers and in chemical warfare. These compounds are highly toxic, and an accidental overdose can result in confusion, loss of reflexes, sei...
or her own living because of mental retardation or a physical handicap which started prior to the date he to by: � A bodily or mental infirmity. � A disease, ptomaine, or bacterial infection.* � Medical is no longer a defined dependent. � When your coverage terminates. Handicapped Dependent Children Life
Safety is the state of mind by which leaders at all levels contribute to force protection. We have to maintain vigilance to ensure we do all we can to prevent accidental losses of soldiers, sailors, marines, airmen, the public, and equipment I, have direc...
A mission-critical failure is defined to be a failure that results in the permanent loss of data from .... be shown by analysis that the probability of accidental impact of any part of the spacecraft on Mars shall be ... 3.4.3.6 Command Accountability. ...
Battlefield and accidental laser-induced retinal injuries can produce significant retinal scarring and permanent vision loss. Lasers have become an integral part of military weapon system. The proliferation of lasers in battlefield and workplace environme...
Circumstances surrounding accidental tanker explosions indicate the need for a safe, universal yet economical technique with which to effectively inert and clean tanks. This research investigates a human factors oriented concept combining material, equipm...
DOE Order (DOE O) 440.1, Worker Protection Management for DOE Federal and Contractor Employees, establishes the framework for an effective worker protection program to reduce or eliminate accidental losses, injuries, and illnesses by providing workers wit...
Using a two-stage survey approach, we identified households that had suffered economic losses in the 12 months because of recent or previous injuries, and we collected detailed information about accident circumstance, nature and severity of the injury, He...
Loss of petroleum products from underground storage tanks, pipelines, and accidental spills are major sources of contamination of unsaturated soils, aquifer solids, and a shallow water table aquifer under the U.S. Coast Guard Air Station at Traverse City,...
Calculations of radiative losses in a thermonuclear plasma for impurity C,O,Fe, Mo ions are carried out to take into account the effect of the injected neutral beams on the radiation of impurity ions. Data on the magnification ratio of radiative losses du...
During the 1994 heavy ion run at Brookhaven a strongly intensity dependent loss for the Au(15+) beam in the AGS Booster was encountered. Coherent instabilities or space charge induced stopband losses were neither expected nor consistent with the data. It ...
Good agreement was obtained between computed values and results from a bench measurement technique for the total loss to parasitic modes in several cylindrical cavities with beam ports. The measurement of loss as a function of time within the current puls...
Beam losses and the resulting component activation at the Los Alamos Proton Storage Ring (PSR) have limited operating currents to about 30 mu A average at a repetition rate of 15 Hz. Loss rates were found to be approximately proportional to the circulatin...
Tritium release objectives below 10 Ci/day have been considered in the case of near term fusion reactors. The reported investigation shows that such low emission goals may not be cost effective in the sense of the established policy to keep releases as low as is reasonably achievable. For a reactor hall of the approximate volume of 150,000 cu m, losses could be kept to such a ...
Leaching of radionuclides produced in soil and rock by high energy proton-induced radiation was studied for the SSC site. Comparison was made with predictions of a Monte Carlo code CASIM and previous results for the Fermilab site. The principal long-lived radionuclides were 3H and 22Na in agreement with Fermilab results. A few other radionuclides were present at lower concentrations in a subset of ...
Leaching of radionuclides produced in soil and rock by high energy proton-induced radiation was studied for the SSC site. Comparison was made with predictions of a Monte Carlo code CASIM and previous results for the Fermilab site. The principal long-lived radionuclides were {sup 3}H and {sup 22}Na in agreement with Fermilab results. A few other radionuclides were present at lower concentrations in ...
Minimization of the beam losses in a multi-MW H{sup -} linac such as ProjectX to a level below 1 W/m is a challenging task. The impact of different mechanism of beam stripping, including stripping in electric and magnetic fields, residual gas, blackbody radiation and intra-beam stripping, is analyzed. Other sources ...
In this note, the authors briefly review the current lattice of the NLC extraction line which was designed for the nominal NLC beam parameters. Then the authors describe the beam parameters for the high luminosity option with larger beam disruption parameter and discuss its effect on beam loss ...
In this note we present results of beam tracking in the NLC extraction line for the NLC option with high luminosity beam parameters (option H). Particle losses for 0.5 TeV and 1 TeV cms energy beams have been computed and examined as a function of beam of...
In this note we present results of beam tracking in the NLC extraction line for the NLC option with high luminosity beam parameters (option H). Particle losses for 0.5 TeV and 1 TeV cms energy beams have been computed and examined as a function of beam offset at the interaction point (IP). ...
This study reports on a review of the safety programs and performance at 13 Department of Energy contractor facilities, involving over one-half million man-years of experience. Safety performance was compared with the size of staff and safety department funding over an 11-year period (1980-1990). Indicators of safety performance were taken as lost workdays, recordable injuries, ...
In order to avoid the effects of long-range beam-beam interactions which produce beam blow-up and deteriorate beam life time, a compensation scheme with current carrying wires has been proposed. Two long-range beam-beam compensators were installed in RHIC rings in 2006. The effects of the compensators have been ...
Identifies diagnostic criteria for Posttraumatic Stress Disorder (PTSD) and describes PTSD symptoms as possible student reactions to sudden, unexpected death by suicide or sudden loss from accidental or deliberate death. Reviews literature on PTSD. identifies phases of recovery, and describes brief strategic intervention for school counselors to use. (NB)
ERIC Educational Resources Information Center
Gold beam injection efficiency decreases in proportional to the beam loss in the AGS Booster. A close look shows that large number of electrons, ions, and neutral particles are created when the gold beam scrapes wall. To investigate the neutral particle production due to the beam ...
