... BEAM STEERING, *PARTICLE BEAMS, *PARTICLE TRAJECTORIES, *PARTICLE ACCELERATORS, MAGNETIC FIELDS, EMITTANCE, PHASE ...
DTIC Science & Technology
When the authors first proposed an accelerator-driven reactor, the concept was opposed by physicists who had earlier used the accelerator for their physics experiments. This opposition arose because they had nuisance experiences in that the accelerator was not reliable, and very often disrupted ...
DOE Information Bridge
... Experiments at Spire and at the Gamble I facility of NRL show that the beam front propagation velocity is not affected by the dielectric guide ...
A successful experiment to accelerate a proton beam to 500 GeV in the Fermilab synchrotron is described.
High current beam conditioning experiments are being conducted on the IBEX accelerator at SNLA with the goal of developing an optimum beam conditioning cell for installation on RADLAC II for 20-MeV, 40-kA hose growth experiments. The IBEX accelerator can ...
National Technical Information Service (NTIS)
When the authors first proposed an accelerator-driven reactor, the concept was opposed by physicists who had earlier used the accelerator for their physics experiments. This opposition arose because they had nuisance experiences in that the accelerator wa...
Investigations on the laser acceleration in vacuum are reviewed including up-date experimental results, projects of new experiments and theoretical prospects of vacuum acceleration schemes for high energies of accelerated particles. Most attention is devoted to analysis of the IFELs with focused laser ...
NASA Astrophysics Data System (ADS)
A brief summary of the talks on accelerator physics presented at this conference, Intersections Between Particle and Nuclear Physics , is given. New accelerator facilities and technologies, beam cooling, and the experiments were part of these discussions.
Energy Citations Database
An experiment was conducted at the Advanced Test Accelerator (ATA) in the spring/summer of 1988 to study the transport of the ''laser guided'' electron beam through the accelerator and beyond. The electron beam was guided from the /approximately/3.75 MeV ...
Advances are reported in the theory and experiments investigating Inertial Confinement Fusion with light ion beams on the Particle Beam Fusion Accelerator II (PBFA II). Impedance of the accelerating gap, electron-ion instabilities, proton beam generation ...
Beam profile monitor (BPM) is widely used at the Brookhaven accelerator test facility (ATF) for machine operation and beam studies. BPM is also critical for many ATF experiments, such as laser acceleration and single - pass FEL experiments where both lase...
The experiments at the GSI for the injection of high current beams into heavy ion accelerators are described. The ion source, the beam extraction, and the beam transport are considered. (ERA citation 10:003140)
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
We report experiments evaluating the beam generation by the new 4-MV RLA injector and the subsequent beam transport and acceleration through the ET-2 post-accelerating cavity. Beams of 15 to 20 kA current were produced and successfully accelerated ...
Ion acceleration has now been demonstrated with the IFA-2 collective ion accelerator system. The IFA-2 system is described, photoionization experiments are summarized, and ion results are presented. Using a 1 MeV electron beam and a 30 cm acceleration len...
This report describes beam director elements for an experiment at the Advanced Test Accelerator. The elements described include a vernier magnet for beam aiming, an achromat magnet, and an isolation system for the beam interface. These components are built at small scale for concept testing. ...
A parasitic electron beam facility was developed at the Mark III linear accelerator, Stanford University. The beam was used both for physics experiments and for computer and spark chamber tests even though the beam intensity is very low. A tagged photon b...
, the RF bunchers in the injection beam line, used to enhance the cyclotron transmission by a factor by the beam transport through the injection beam line, the cyclotron accelerator and the extraction beam line aspects of the experiment; it required frequent retuning of ...
E-print Network
The Two-Beam Accelerator (TBA) shows great promise for achieving high accelerating gradients, perhaps >250 MV/m, for such machines as electron linear colliders. This paper presents the results of studies of candidate structures for a TBA. Also, the hardwa...
The Continuous Electron Beam Accelerator Facility (CEBAF) will be a 4-GeV, 200- mu A superconducting recirculating linear accelerator to provide CW electron beams to simultaneous nuclear physics experiments in three end stations. Funded by the Department ...
The Multiple Beam Experiment MBE4 is designed to accelerate four cesium ion beams from 200 kV to about 1 MV using an induction linac and to demonstrate the process of current amplification simultaneously with acceleration. The injected beam is obtained fr...
To successfully provide beam to experiments from the Tevatron requires that we be able to perform many distinct operations on the internal accelerator beam. These include injecting beam, correcting the orbit, accelerating and then squeezing or extracting ...
A 3 MV, 800 kA, 24 ns electron beam accelerator is described and the results of initial switching experiments are discussed. The generator will provide a source for studying the physics of processes leading to electron beam driven, inertially confined fus...
The SLC program is an accelerator experiment and a physics experiment. The progress in the accelerator experiment has been rapid, with injector and damping ring components working, conventional construction on schedule, and technical components in production. Accelerator ...
A plan for exploring the physics and technology of induction linac development is discussed which involves a series of increasingly sophisticated experiments. The first is the single-beam transport experiment, which has explored the physics of a single space-charge-dominated beam. Second is the ...
At the Wakasa Wan Energy Research Center (WERC), we had constructed an accelerator system with a 5 MV tandem accelerator and a 200 MeV proton synchrotron. The tandem machine has 5 beam lines for the MeV order beam experiments. Also the tandem beam is injected to the ...
Jul 16, 2011 ... The equipment consisted of an electron beam accelerator, magneto plasma dynamic (MPD) arcjet, battery/capacitor bank to provide high ...
NASA Website
Oct 14, 2003 ... For each experiment, an accelerator produces beams of protons or heavy ... Since the 1970s, NASA has been using particle accelerators to ...
This report describes the operation statistics of the accelerator facility of the year 2001. The data were collected with the help of the program PROST [1]. Accelerator development and experiments are the topic of separate contributions [2], [3] and [4] to this annual report.
... Descriptors : *NUCLEAR FUSION, *ION SOURCES, *ION ACCELERATORS ... ION BEAMS, X RAY DIAGNOSTICS, CONFIGURATIONS, FOCUSING ...
A series of plasma wakefield acceleration (PWFA) experiments are being conducted with a 30 GeV drive beam from the Stanford Linear Accelerator Center (SLAC). These experiments continue to address the application of meter-scale plasmas to focus and accelerate electrons and ...
A second-generation ionization-front accelerator system (IFA-2) is being brought into operation. Results of IFA-2 IREB optimization experiments, laser-characterization experiments, beam-switch experiments, and laser-deflector experiments are presented. Th...
The heavy ion beam parameters of the initial part of the heavy ion collective accelerator (KUTI-20) are presented. It is shown that the use of special features of collective accelerator provides the performance of experiments in-not easily attainable earl...
A magnetic analyzer and the methods of partial and total absorption in foils are used to measure the energy spectrum of high-current electron beams in experiments on the Impulse accelerator.
An inexpensive beam current integration system is described which measures the total integrated charge in a direct current accelerator beam during electron damage or ion implantation experiments over a wide range of positive or negative beam currents used...
A series of beam experiments is being planned in the Jefferson Lab FEL driver accelerator in order to study multi-pass beam breakup instabilities in the machine and to test the predictions of the numerical code TDBBU. The tests are extensions of previously performed or proposed experiments, and ...
The Holifield Radioactive Ion Beam Facility (HRIBF) includes a cyclotron (ORIC) which provides high-intensity light-ions for producing radioactive atoms, and a 25 MV tandem electrostatic accelerator which is used to accelerate the radioactive-ions for nuclear structure and nuclear astrophysics research. Ion sources and targets ...
The RADLAC program encompasses high power electron beam propagation experiments and accelerator development, both for advanced propagation experiments and to develop compact accelerator options for future charged particle beam weapons (CPBW). Propagation ...
The Beam Experiments Aboard Rockets (BEAR) accelerator experiment imposes several nonstandard requirements on the rf control system. The experiment is entirely hands-off and must operate under local computer control. The rf control system must be extremel...
This Technical Memorandum (TM) summarizes the Fermilab accelerator and accelerator experiment operations for FY 2010. It is one of a series of annual publications intended to gather information in one place. In this case, the information concerns the FY 2010 Run II at the Tevatron Collider, the MINOS and MINER?A ...
Accelerator-based atomic physics experiments at Brookhaven presently use heavy-ion beams from the Dual MP Tandem Van de Graaff Accelerator Facility for atomic physics experiments of several types. Work is presently in progress to develop experiments which will use the ...
The design and current status of experiments to couple the Tapered Hybrid Undulator (THUNDER) to the Lawrence Berkeley National Laboratory (LBNL) laser plasma accelerator (LPA) to measure electron beam energy spread and emittance are presented.
The most successful collective ion acceleration to date has been observed when a relativistic electron beam has been discharged in the Luce diode (dielectric anode) geometry. In these experiments the ratio of peak proton energy to beam kinetic energy has ...
The Argonne Tandem Linac Accelerator System (ATLAS) facility at Argonne National Laboratory provides a wide range of accelerated heavy ions from the periodic table. Frequently, the beam delivery rate of 12 MHz is too fast for the type of experiment on lin...
Mission preparation and support, data reduction and analysis, and modelling of beam phenomenon activities are described with respect to the Space Experiments with Particle Accelerators (SEPAC) project. The SEPAC Electron Beam Accelerator was used in obser...
The present Argonne Tandem-Linac accelerator has operated in a reliable manner during the past year. The accelerator system provided 4402 hours of experimental beam time with a wide variety of heavy-ions. Figure 1 shows the beams which have been provided ...
Significant improvements have been made recently in the generation and focusing of intense proton beams on the PBFA-I accelerator using a magnetically-insulated ion diode. Ions are accelerated from a 15-cm radius cylindrical flashover anode plasma across ...
Analytical and numerical calculations are presented for a reflexing electron beam type of collective ion accelerator. These results are then compared to those obtained through experiment. By constraining one free parameter to experimental conditions, the ...
Recent experiments have explored the use of a free-electron laser (FEL) as a buncher for a microwave two-beam accelerator, and the subsequent driving of a standing-wave rf output cavity. Here the authors present a deeper analysis of the longitudinal dynam...
Idaho State University Physics Department is assisting the Idaho National Engineering Laboratory in the analysis of beam monitor data taken during an electron accelerator experiment conducted at the Lawerence Livermore National Laboratory in 1987. The bea...
Beam transport experiments on Sandia's Recirculating Linear Accelerator (RLA) using a 1.5-MV injector with and without an additional 1.0 MV of acceleration provided by the ET-2 accelerating cavity were concluded this year. Our experimental results show th...
The present paper gives the results of the latest experiments, in which it was possible to obtain a compensated proton beam with a current considerably exceeding the space charge limit. The experiments were performed with the acceleration ring with an H e...
Fixed Field Alternating Gradient accelerators(FFAGs) have been developed for various applications recently. Contrary to the ordinary synchrotron, FFAGs have a large capability of accelerating high current beams because of strong beam focusing to have a large beam acceptance and static magnetic ...
The Advanced Test Accelerator (ATA) is a linear induction electron accelerator whose design parameters are 50 MeV, 10 kA and 70 ns pulse duration. The key physics issues affecting performance of the accelerator involve beam dynamics during transport through the accelerator structure. In this ...
In a first beam dynamics validation experiment for a new Pulse Line Ion Acceleration (PLIA) concept, the predicted energy amplification and beam bunching were experimentally observed. Beam energy modulation of -80 keV to +150 keV was measured using a PLIA input voltage waveform of -21 kV to +12 ...
The Heavy Ion Fusion Accelerator Research Program at Lawrence Berkeley Laboratory has proposed building a 10 MeV Induction Linac Systems Experiment, ILSE, to investigate accelerator physics and beam manipulations which are needed or desirable for an induction linac driver. This paper describes the ...
Over the next three years the research program of the Heavy Ion Fusion Virtual National Laboratory (HIF-VNL), a collaboration among LBNL, LLNL, and PPPL, is focused on separate scientific experiments in the injection, transport and focusing of intense heavy ion beams at currents from 100 mA to 1 A. As a next major step in the HIF-VNL program, we aim for a ...
The design of a negative ion beam transport system is discussed. The ion source and accelerator have produced a 1-A, 8 keV beam of H ions with a pulse length of 30 seconds. The beam was additionally characterized as to electron content, uniformity along the slot, emittance perpendicular to the slot, and the ...
A facility to produce proton-rich radioactive beams for nuclear structure and astrophysics experiments is proposed. This Oak Ridge Exotic Beam (OREB) facility is based on two existing accelerators. Beams of mass up to 80 can be accelerated to energies of about 5 ...
Proton beam stability when in collision with high current electron bunches was of foremost concern during the design stages of the HERA collider[1]. In initial commissioning the beam-beam interaction proved to be a key factor in determining the lifetime of the proton beam. It was quickly ascertained[2] that the proton ...
While prototype experiments with proton-rich radioactive beams have been formed at various existing facilities, investigations with accelerated neutron-rich beams have to await the availability of the next-generation facilities. In this contribution possible future experiments with neutron-rich ...
The construction of the ATLAS superconducting heavy-ion linear accelerator is complete. The first beam acceleration occurred on March 22, 1985. The first experiment with the ATLAS linac took place during the week of October 7, 1985. The project was comple...
An arrangement of an accelerator for Bev proton experiments is described. Both a positive and negative beam are accelerated in a single proton synchrotron, but in opposite directions. They can be made to collide, then, at some target area. (T.R.H.)
Experiments using an electron beam produced by laser-wakefield acceleration have shown that varying the overall beam-plasma interaction length results in current filamentation at lengths that exceed the laser depletion length in the plasma. Three-dimensional simulations show this to be a combination of hosing, ...
PubMed
The 500 nm Free-Electron Laser (ATF) of the Brookhaven National Laboratory is reviewed. We present an overview of the ATF, a high-brightness, 50-MeV, electron accelerator and laser complex which is a users' facility for accelerator and beam physics. A number of laser acceleration and FEL ...
Frequency tuning in the accelerating system of the NAP-M is accomplished according to the signal from a Hall pickup, which is proportional to the magnitude of the magnetic field. Precise frequency tuning is carried out from the radial and phase coordinates of the beam. Monitoring of the beam parameters consists in measuring the ...
The U.S. Heavy Ion Fusion Program is completing a 2-decade effort of small-scale experiments and analysis to explore the beam manipulations and non-neutral plasma physics of the intense beams necessary for a driver. The next step, a proof-of-principle experiment called the "Integrated Beam ...
This Technical Memorandum (TM) summarizes the Fermilab accelerator and accelerator experiment operations for FY 2009. It is one of a series of annual publications intended to gather information in one place. In this case, the information concerns the FY 2009 Run II at the Tevatron Collider, MINOS using the Main Injector Neutrino ...
This Technical Memorandum (TM) summarizes the Fermilab accelerator and accelerator experiment operations for FY 2008. It is one of a series of annual publications intended to gather information in one place. In this case, the information concerns the FY 2008 Run II at the Tevatron Collider, MINOS using the Main Injector Neutrino ...
This Technical Memorandum (TM) summarizes the Fermilab accelerator and accelerator experiment operations for FY 2007. It is one of a series of annual publications intended to gather information in one place. In this case, the information concerns the FY 2007 Run II at the Tevatron Collider, the MiniBooNE and SciBooNE ...
In this paper, we give a brief description of several advanced accelerating structures, such as dielectric loaded waveguides, photonic band gap, metamaterials and improved iris-loaded cavities. We describe wakefields generated by passing high current electron beams through these structures, and applications of wakefields to advanced ...
A plasma-based wakefield acceleration (PWFA) experiment is proposed that will accelerate parts of an SLC bunch by up to 1 GeV/m over a length of 1 m. A single SLC bunch is used to both induce wakefields in the one meter long plasma and to witness the resulting beam acceleration. The proposed ...
The use of existing Fermilab facilities to provide beams for two muon experiments - the Muon to Electron Conversion Experiment (Mu2e) and the New g-2 Experiment - is under consideration. Plans are being pursued to perform these experiments following the completion of the Tevatron Collider Run ...
Space charge effects on beam dynamics in linear accelerators are discussed. Practical linac beam dynamics calculation methods which include space charge effects are discussed. Also, the status of beam performance experiments including space charge studies are summarized. {copyright} {ital 1998 ...
Space charge effects on beam dynamics in linear accelerators are discussed. Practical linac beam dynamics calculation methods which include space charge effects are discussed. Also, the status of beam performance experiments including space charge studies are summarized.
Recent results from light ion fusion experiments on the Particle Beam Fusion Accelerator (PBFA II) are reported. Intense proton beams have been used to drive two different types of targets. In the thermal source targets, the proton beam heated a low-densi...
We present results of progress on the LBL multiple beam induction linac experiment (MBE-4). This machine models the accelerator physics of the electric-focused portion of a driver for heavy ion inertial confinement fusion. Four beams of cesium ions are ac...
Recent progress in the understanding of beam physics and technology factors determining the current and brightness of ion and electron beams in linear accelerators will be reviewed. Topics to be discussed including phase-space density constraints of parti...
Analysis of the recent ATA propagation experiments revealed that there is an inherent ''weakness'' of the ion channel used to guide the beam through the accelerator. This weakness makes matching the beam onto the channel difficult, particularly for high c...
This paper discusses the following topics: beam propagation theory and computations; ATA operations supporting the CPB experimental program; multi-pulse beam propagation experiments; diagnostics development and data handling; and compact accelerator technology development.
An electron beam scanner is described which is used to produce unform scans and steering of the electron beam from a l MeV Van de Graaff accelerator during electron radiation damage experiments. (auth)
An electron beam scanner is described which is used to produce uniform scans and steering of the electron beam from a one MeV Van de Graaff accelerator during electron radiation damage experiments. (Author)
... Descriptors : *Linear accelerators, *Ion accelerators, *Particle accelerator components, *Electron accelerators, *Proton accelerators, Electron beams ...
Generation of accelerating plasma waves using two counter-propagating laser beams is considered. Colliding-beam accelerator requires two laser pulses: the long pump and the short timing beam. We emphasize the similarities and differences between the conventional laser wakefield ...
Several accelerator-based neutron capture therapy applications are under development. These applications include boron neutron capture therapy for glioblastoma multiform and boron neutron capture synovectomy (BNCS) for rheumatoid arthritis. These modalities use accelerator-based charged-particle reactions to create a suitable neutron source. Neutrons are ...
Highlights of recent experimental and theoretical research progress on the high current beam transport of single and multiple beams by the Heavy Ion Fusion Accelerator Research (HIFAR) group at the Lawrence Berkeley Laboratory (LBL) are presented. In the single beam transport experiment (SBTE), ...
The main parameters, program and current state of preparatory works on experiments in a new LEP accelerator-storage ring facility, being constructed at CERN, have been considered. The LEP magnetic system, beam injection system, RF accelerating system and ...
, located at the BNL Accelerator Test Facility (ATF), is to demonstrate laser acceleration of optically. The basic layout for the experiment is depicted in Fig. 1. IFEL PREBUNCHER DRIFT & e-BEAM FOCUSING OPTICS/lens system.) A Nichrome wire in the shape of a single loop is pressed against the outer edge of the ...
This report discusses the following topics: research with multiple- beam experiment MBE-4; induction linac systems experiments; and long- range research and development of heavy-ion fusion accelerators.
The experiments on the synthesis of superheavy elements in the reactions induced by the accelerated zinc ions are described. The experimental technique was intended to registrate the spontaneous fission at operation with the external cyclotron beam. The experimental limits for the production cross sections and lifetimes of ...
An electron accelerator was flown on an Aerobee 350 rocket from Wallops Island, Virginia, in January 1969. At altitude the accelerator put out a series of electron-beam pulses up to 1 sec long aimed downward along the magnetic-field line. Several electron...
Experiments are planned at ANL to study a new accelerating concept that has been developed during the last few years named the WAKEATRON. This requires a very special, simple configuration of the beams and of the rf structure involved. The basic concepts ...
Over the next three years the research program of the Heavy Ion Fusion Virtual National Laboratory (HIF-VNL), a collaboration among LBNL, LLNL, and PPPL, is focused on separate scientific experiments in the injection, transport and focusing of intense heavy ion beams at currents from 100 mA to 1 A. As a next major step in the HIF-VNL program, they aim for ...
High transformer ratio operation of the plasma wake field accelerator requires a tailored drive beam current profile followed by a short witness bunch. We discuss techniques for generating the requisite dual bunches and for obtaining the desired drive beam profile, with emphasis on the FACET experiment at SLAC ...
Brookhaven National Laboratory Accelerator Test Facility is a laser-electron linear accelerator complex designed to provide high brightness beams for testing of advanced acceleration concepts and high power pulsed photon sources. Results of electron beam parameters attained during the ...
This issue includes articles on ion-beam focusing in the Particle Beam Fusion Accelerator; embedded atom theory of metals; new experiments on convective heat loss; and an experiment establishing that molten nitrate salt is an efficient working fluid for g...
Since 1985 the Heavy Ion Fusion Accelerator Research program at the Lawrence Berkeley Laboratory has been studying current amplification and emittance variations in MBE-4, a four-cesium-beam ion induction linac. This experiment models much of the accelera...
To demonstrate the feasibility of producing and utilizing a channeling-radiation beam at a typical medical electron accelerator. The experiment consisted of two distinct stages, designing and assembling an extension to the existing beam line and running the experiment using silicon and diamond ...
This paper summarizes the ongoing studies on the possibilities for transport and RF capture of laser-accelerated proton beams in conventional accelerator structures. First results on the capture of laser-accelerated proton beams are presented, supported by Trace3D, CST particle studio and Warp ...
Intense beam experiments with a high specific deposition power can already be performed using the RFQ accelerator. With such a beam we succeeded for the first time to produce a heavy ion induced plasma. Due to the high deposition power of the beam we had to employ special target techniques ...
At the low energy end of an induction linac HIF driver the beam current is limited by our ability to control space charge by a focusing system. As a consequence, HIF induction accelerator designs feature simultaneous acceleration of many beams in parallel within a single accelerator structure. ...
Progress in the following areas of relativistic electron beam investigations is described: (1) collective ion acceleration experiments using relativistic electron beams and localized ion sources produced by thin films, filaments, puffed gases and vaporization of small diameter wires; and (2) electron ...
The BNL IFEL will be used to optically prebunch the e-beam before sending it into an inverse Cerenkov acceleration (ICA) stage. Prebunching the beam will greatly improve the efficiency of the ICA process. The basic experimental design and preliminary model predictions for the combined ICA/IFEL experiment are ...
The DARHT II accelerator at LANL is preparing a series of preliminary tests at the reduced voltage of 7.8 MeV. The transport hardware between the end of the accelerator and the final target magnet was shipped to LLNL and installed on ETA II. Using the ETA II beam at 5.2 MeV we completed a set of experiments ...
Recent experiments at SLAC have shown that high gradient acceleration of electrons is achievable in meter scale plasmas [1,2]. Results from these experiments show that the wakefield is sensitive to parameters in the electron beam which drives it. In the experiment the bunch length and ...
Generator and diode problems have reduced electron beam parameters for the proof-of-principle autoresonant collective ion acceleration experiment from 3 MeV, 30 kA, and 200 ns to 2.25 MeV, 15 kA, and 100 ns. This reduction limits acceleration of hydrogen ...
Among DOE's goals for inertial confinement fusion is support of construction of a heavy ion facility for demonstration experiments on deuterium tritium (DT) pellets with ion beams of 25 to 100 kJ energy. Three accelerator laboratories (Argonne, Berkeley, and Brookhaven) are actively engaged in accelerator ...
The following topics on charged-particle beam research program are discussed: management and application; beam propagation theory and computations; accelerator theory; ATA operations supporting the CPB experimental program; multiple pulse propagation experiment; diagnostics development and handling; and compact ...
This report discusses the following on charged-particle beam research program: management and application; beam propagation theory and computations; accelerator theory; ATA operations supporting the CPB experimental program; multiple pulse propagation experiment; diagnostics development and handling; and compact ...
This paper discusses the development of ion beam pulse shaping, efficient extraction ion diodes, and efficient plasma channel transport for the particle beam fusion accelerator PBFA II. 10 refs. (ERA citation 13:006998)
... High current electron beam transport in ... Descriptors : *BEAM FORMING, *ELECTRON ACCELERATORS, *ELECTRON BEAMS, HIGH ENERGY ...
The Cooler Synchrotrons and storage ring COSY at the Forschungszentrum Juelich accelerates protons to momenta between 600 MeV/c and 3300 MeV/c [2]. At present the beam is used at four internal and three external target places. In addition, a polarized beam can be produced and accelerated at COSY. A colliding ...
The analogy between geometric optics and Hamiltonian mechanics is used to propose an experiment that simulates the beam propagation in a focusing magnetic lattice of a particle accelerator. A laser beam is reflected several times by a parabolic mirror and the resulting pattern is registered by a photo camera. This ...
The technical description treats the arrangement of the Injector System (made up of an existing High Voltage Marx Generator, a new Four-beam Source array and a Beam Conditioning Unit for matching and steering) and the Accelerator Apparatus which contains the 24 shaped-pulsed accelerating units. Flexibility in ...
This report contains a discussion of the diagnostics required for the beam propagation experiment to be done with the ATA accelerator. Included are a list of the diagnostics needed; a description of the ATA experimental environment; the status of beam diagnostics available at Livermore including recent ...
The Neutrinos at the Main Injector (NuMI) neutrino beam facility began operating at the Fermi National Accelerator Laboratory in 2005. NuMI produces an intense, muon-neutrino beam to a number of experiments. Foremost of these experiments is MINOS--the Mai...
Progress achieved in the understanding and development of collective ion acceleration is presented. Extensive analytic and computational studies of slow cyclotron wave growth on an electron beam in a helix amplifier were performed. Research included precise determination of linear coupling between beam and helix, suppression of ...
This report presents highlights of major projects in the Accelerator Technology (AT) Division of the Los Alamos National Laboratory. Radio-frequency and microwave technology are dealt with. The p-bar gravity experiment, accelerator theory and simulation activities, the Proton Storage Ring, and the Fusion Materials Irradiation Test ...
The linear induction accelerator, RADLAC II, is being upgraded to produce a 20-MeV, 40-kA annular beam. Previously, the accelerator produced a 15-MeV, 15-kA beam. Improvements in the pulsed power, injector design, and magnetic field have resulted in a faster rising, flat-topped voltage pulse. The first ...
Beam tests of the ANL 12 MHz Radio-Frequency Quadruple (RFQ), designed for use as the initial element of an injector system for radioactive beams into the existing ATLAS accelerators, are in progress. Recent high-voltage tests of the RFQ without beam achieved the design intervane voltage of 100 kV CW, enabling ...
Recent experiments and simulations have shown that positron beams propagating in plasmas can be focused and also create wakes with large accelerating gradients. For similar parameters, the wakes driven by positron beams are somewhat smaller compared to the case of an electron beam. Simulations ...
The DARHT-II linear induction accelerator (LIA) accelerates a 2-kA electron beam to more than 17 MeV. The beam pulse has a greater than 1.5-microsecond flattop region over which the electron kinetic energy is constant to within 1%. The beam dynamics are diagnosed with 21 ...
An injector is being developed at LBL that would serve as the front end of a scaled induction linac accelerator technology experiment for heavy ion fusion. The ion mass being used is in the range 10--18. It is a multi-beam device intended to accelerate up to 2 MeV with 500 mA in each beam. The ...
A series of experiments was performed with an Applied-B-italic ion diode on the Particle Beam Fusion Accelerator-I, with peak voltage, current, and power of approximately 1.8 MV, 6 MA, and 6 TW, respectively. The purpose of these experiments was to explore issues of scaling of Applied-B-italic diode operation from ...
An observation of relativistic antihydrogen atoms is reported in this dissertation. Experiment 862 at Fermi National Accelerator Laboratory observed antihydrogen atoms produced by the interaction of a circulating beam of high momentum (3
Modifications made on the ZGS to allow the acceleration of polarized deuterons and the operational experiences with the first production run with this beam are described.
The requirements for a heavy-ion demonstration experiment to achieve useful electric power generation through inertial confinement fusion are discussed. (MOW)
This paper discusses: accelerator physics and special projects; experiments and injectors; magnetic optics and beam diagnostics; accelerator design and engineering; radio-frequency technology; accelerator theory and simulation; free-electron laser technology; accelerator ...
... Accelerators and Colliders; Beam Dynamics; Applications and New Methods of Acceleration; New Methods; Linear Accelerators and Pulsed Power ...
The Relativistic Heavy Ion Collider provides not only collisions of ions but also collisions of polarized protons. In a circular accelerator, the polarization of polarized proton beam can be partially or fully lost when a spin depolarizing resonance is encountered. To preserve the beam polarization during ...
This Technical Memorandum (TM) summarizes the Fermilab accelerator and experiment operations for FY 2006. It is one of a series of annual publications intended to gather information in one place. In this case, the information concerns the FY 2006 Run II at the Tevatron Collider, the MiniBooNE experiments running in the Booster Neutrino ...
Recent experiments at SLAC have shown that high gradient acceleration of electrons is achievable in meter scale plasmas. Results from these experiments show that the wakefield is sensitive to parameters in the electron beam which drives it. In the experiment the bunch lengths were varied ...
We will start with a brief overview of neutrino oscillation physics with emphasis on the remaining unanswered questions. Next, after mentioning near future reactor and accelerator experiments searching for a non zero {theta}{sub 13}, we will introduce the plans for the next generation of long-baseline accelerator neutrino oscillation ...
The propagation of electron beam currents much greater than the space charge limit and collective ion acceleration in evacuated dielectric guides was investigated. Experiments at Spire and at the Gamble I facility of NRL show that the beam front propagation velocity is not affected by the dielectric guide ...
The Fermilab accelerator complex is in the middle of an upgrade plan Fermilab III. In the last phase of this upgrade the luminosity of the Tevatron will increase by at least one order of magnitude. In order to keep the number of interactions per crossing manageable for experiments, the number of bunches will be increased from 6 {times} 6 to 36 {times} 36 ...
The US LHC Accelerator Research Program (LARP) hosted a mini-workshop on beam-beam compensation at SLAC. The workshop reviewed the experience with beam-beam compensation tests, both long-range and head-on, in existing machines (DCI, SPS, Tevatron, DAFNE, KEKB, RHIC), and outlined milestones for the implementation ...
Electron accelerator sources of radiation for industrial processes must maintain constant and reproducible irradiation parameters in order to provide satisfactory dose quality assurance. The advanced control system used in AECL's IMPELATM series of accelerators ensures this by making it possible to decouple the primary accelerator ...
A pulsed high field solenoid was used in a laser-proton acceleration experiment to collimate and transport the proton beam that was generated at the irradiation of a flat foil by a high intensity laser pulse. 1012 particles at an energy of 2.3 MeV could be caught and transported over a distance of more than 240 mm. Strong space charge ...
The Holifield Facility 25URC tandem accelerator will begin accelerating radioactive ion beams (RIBs) for nuclear structure and astrophysics research in 1996. This paper addresses the development of the accelerator to allow optimum operation with the particular challenges associated with RIBs. New diagnostics for ...
Inelastic collisions between accelerated particles and residual gas in the accelerator vessel can cause the residual gas to fluoresce. The gas fluorescence intensity is proportional to the current density of the particle beam. This process provides the foundation for a video diagnostic system to measure the profile and position of ...
A multiaperture multigrid accelerator called "MeV accelerator" has been developed for neutral beam injection system of international thermonuclear experimental reactor. In the present work, long pulse H(-) ion beam acceleration was performed by the MeV accelerator equipped ...
... Descriptors : *ELECTRON ACCELERATORS, *LINEAR ACCELERATORS, USSR, ALIGNMENT, ELECTRON BEAMS, PRECISION ...
We review the current and future accelerator technologies for generation of high brightness radiation beam.
A proof-of-principle experiment on staged all-optical laser wakefield acceleration was performed at the Naval Research Laboratory. Electrons with <1 MeV energy created by the interaction of a 2 TW laser beam with a nitrogen gas jet were injected and accelerated to more than 20 MeV in a plasma wakefield ...
A proof-of-principle experiment on staged all-optical laser wakefield acceleration was performed at the Naval Research Laboratory. Electrons with <1 MeV energy created by the interaction of a 2 TW laser beam with a nitrogen gas jet were injected and accelerated to more than 20 MeV in a plasma wakefield generated ...
The Cyclotron Institute at Texas A&M University is carrying out an upgrade project which will lead to accelerated radioactive ion beams at intermediate energies. The project involves recommissioning a K150 cyclotron for acceleration of stable beams which will be used to produce radioactive ions. Both light-ion ...
Recent activities at the JAEA-Tokai tandem accelerator facility are presented. The terminal voltage of the tandem accelerator reached 19.1 MV by replacing acceleration tubes. The multi-charged positive-ion injector was installed in the terminal of the tandem accelerator, supplying high-current noble-gas ions. A ...
Ion acceleration has now been demonstrated with the IFA-2 collective ion accelerator system. The IFA-2 system is described, photoionization experiments are summarized, and ion results are presented. Using a 1 MeV electron beam and a 30 cm acceleration length, IFA-2 has produced 5 MeV H(+), 10 ...
The principles are given for calculating the parameters of a beam-forming system for an experiment on electron scattering by nuclei at high resolution. The image of the input collimator is formed on the analyzing slit and on the experimental target. This makes it possible to obtain the required energy spread and beam position ...
Inverse Cerenkov acceleration (ICA) has entered a new phase in its development. The issue of staging and rephasing the optical wave with a microbunched electron beam is now being examined. This ability to accelerate over multiple stages is important for scaling laser accelerator devices to higher energies. An ...
The problem of beam background in Squid Polarimetry is not without residual benefits. The authors may deliberately generate beam background by gently kicking the beam at the spin tune frequency. This signal may be used to accomplish a simple and accurate absolute calibration of the polarimeter. The authors present details of ...
Radiotherapy electron beams are more complicated than photon beams due to variations in the beam production, the scattering of low-energy electrons, and the presence contaminant photons. The detailed knowledge of a radiotherapy beam is essential to an accurate calculation of dose distribution for a treatment ...
We report on first measurements of the transverse characteristics of laser-produced energetic ion beams in direct comparison to results for laser accelerated proton beams. The experiments show the same low emittance for ion beams as already found for protons. Additionally, we demonstrate that ...
We report here the low emittance beam transport line for laser acceleration experiments at the Brookhaven Accelerator Test Facility (ATF). In order to preserve the low emittance ({approximately} 10{sup -10} m-rad) 50 MeV electron beam, great care has to be paid to the higher-order effects. The ...
This article describes the prototype target and the requirements for the target mechanism needed to provide a beam of muons to the Muon Ionization Cooling Experiment (MICE) from the ISIS accelerator at RAL. The mechanism has achieved the required 85g acceleration to be able to insert the target into the ISIS ...
The design of a high current heavy ion induction linac driver for inertial confinement fusion is optimized by adjusting the acceleration units along the length of the accelerator to match the beam current, energy, and pulse duration at any location. At the low energy end of the machine the optimum is a large number of electrostatically ...
A novel technique is presented for measuring the six-dimensional beam emittance for high-energy H/sup -/ accelerators in real time. This technique uses the single charge exchange cross section from thin and narrow foils (intercepting 1 to 3% of the beam) as a line source for measuring the divergence and momentum spectra for operating ...
The E-157 plasma wakefield experiment addresses issues relevant to a meter long plasma accelerator module. In particular, a 1.4 m long plasma source has been developed for the experiment. The transverse dynamics of the beam in the plasma is studied: multiple betatron oscillations of the beam ...
This interactive game is from Fermilab's Fermilabyrinth project, which aims to "develop an understanding of the operations and experiments that take place in the Fermilab accelerator and detector halls and the scientific ideas they explore." In it, visitors can add or subtract slabs of lead and uranium to stop all particles in the ...
NSDL National Science Digital Library
A summary is given of operations and experimental work at the Fermilab Accelerator. The entire year's activities for 1977 are briefly reviewed, and facility utilization, operations history research activities, and beam utilization by various experiments a...
Experimental data show improved brightness of Lawrence Livermore National Laboratory's Advanced Test Accelerator both at the injector and at the high-energy output. The effects of matching onto a laser-produced ion channel have been demonstrated, and an i...
The Argonne Wakefield Accelerator (AWA) is an experiment designed to test various ideas related to wakefield technology. Construction is now underway for a 100 nC electron beam in December of 1992. This report updates this progress.
A summary is presented of workshop deliberations on basic scaling, the economic viability of laser drive power for HEP accelerators, the availability of electron beam injectors for near-term experiments, and a few very general remarks on technology issues.
Atomic Physics research with beams from accelerators has continued to expand and the number of papers and articles at meetings and in journals reflects a steadily increasing interest and an increasing support from various funding agencies. An attempt will...
