... (Author). Descriptors : *ION ACCELERATORS, ELECTROMAGNETS, ION BEAMS, FOCUSING, RINGS, USSR, LINEAR ACCELERATORS. ...

... Descriptors : *Linear accelerators, *Ion accelerators, *Particle accelerator components, *Electron accelerators, *Proton accelerators, Electron beams ...

... Title : Investigation of Ion Beam Production and Acceleration Using Linear Electron Beams and a Pulse Powered Plasma Focus. ...

... warfare, joint planning, national and international ... a space charge wave accelerator. ... BEAMS, *ION ACCELERATORS, *PLASMA ACCELERATORS ...

... Abstract : Analytical and numerical calculations are presented for a reflexing electron beam type of collective ion accelerator. ...

... Descriptors : (*ION BEAMS, SCATTERING), IONS, ARGON, ENERGY, DISTRIBUTION, PARTICLE ACCELERATOR TARGETS, COPPER, ...

... Descriptors : *ION ACCELERATORS, *LINEAR ACCELERATORS, ELECTRIC FIELDS, CATHODES, ELECTRON BEAMS, INSTABILITY, SPACE ...

... SEE), Latchup, Cyclotron, Accelerator, Lawrence ... ION ACCELERATORS, *CYCLOTRONS, TEST AND EVALUATION, FREQUENCY, IONS ...

... possibility that at high current densities an ... ACCELERATORS), SPACE CHARGE, MAGNETIC FIELDS ... EMISSION, TUNGSTEN, IONS, ION BEAMS ...

This thesis deals with the transport and acceleration of intense ion beams in single-ended Van de Graaff accelerators and the multiple beam rf accelerator MEQALAC (Multiple Electrostatic Quadrupole Array Linear Accelerator). Ch. 2 discusses several ...

... Descriptors : *NUCLEAR FUSION, *ION SOURCES, *ION ACCELERATORS ... ION BEAMS, X RAY DIAGNOSTICS, CONFIGURATIONS, FOCUSING ...

beam to packets of sub-microsecond duration and accumulating beam current in the Proton Storage Ring, and distributing the ion beams to various targets, at which either...

... ION BEAMS, *CYCLOTRON RESONANCE, *PLASMA ... ENERGY, PARTICLES, ELECTROMAGNETIC ... Categories : PARTICLE ACCELERATORS ...

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)

The possibility for small emittance beam formation from the ion ring beam of the collective accelerator is considered. It is shown that by means of a toroidal magnet with azimuthal field and a special form of surfaces the collective accelerator beam could...

The effect of nonlinear ion space charge forces on the ion beam parameters of the heavy ion collective accelerator is considered. It is shown that the effect of space charge forces of ions accumulated in the electron ring leads to increasing the transvers...

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 ...

... Magnetic Analysis of a Beam of Positive Ions, Accelerated by a Voltage of 5-30 kv, After ... argon or krypton atom, or a hydrogen or nitrogen molecule. ...

... (Author). Descriptors : *ION BEAMS, *ION ACCELERATORS, *LINEAR ACCELERATORS, COMPUTERIZED SIMULATION, PLASMAS(PHYSICS ...

... Accession Number : ADD006327. Title : Collective Ion Accelerator with Foil-Less Beam Extraction Window. Descriptive Note : Patent,. ...

An apparatus for accelerating heavy ions to high energies and directing the accelerated ions at a target comprises a source of singly ionized heavy ions of an element or compound of greater than 100 atomic mass units, means for accelerating the heavy ...

The process of ion accumulation in the relativistic electron beams with the account of ion-ion recharge and ionization is calculated. The accumulation of nitrogen ions from the residual gas during the compression of electron rings in heavy ion accelerator...

The desirable features of an ion beam extraction and acceleration modeling code are outlined, and features of the BEAM (Beam Extraction and Acceleration Modeling) code are described. Examples of typical calculations are given and plans for future development are presented. ...

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 ...

The beamline structure is proposed to transport the intense ion beam extracted from the collective ion accelerator and to inject it into heavy ion synchrotron. In the leading part of the channel containing special magneto-optical elements, the matched ion...

The construction of an ion source testing device is described which can be used as injector for the Munich MP-tandem accelerators. Studies of the existence of double negative charged ions are described. Uranium ion beams were produced in a sputtering sour...

Holifield Radioactive Ion Beam Facility An Office of Science User Facility What is HRIBF Science Initiatives Accelerators Beams Equipment & Detectors Accepted Experiments Schedule...

The absence of time structure and the excellent beam and beam transport properties of tandem electrostatic accelerators make them an attractive choice for the acceleration of a large class of radioactive ion species produced with the ISOL technique. In th...

Techniques for producing intense negative ion beams are discussed. These beams are required for intense neutral beam development at energies greater than 150 keV. Handling, acceleration, and stripping of negative ion beams are described.

The three major components of the BNL Heavy-Ion beam facility are described. The tandem accelerator is the ion source, the AGS serves as booster, and to be bulity RHIC completes the facility. (AIP)

... This smaller cluster is likely due ... With larger clusters, lower energy per ... GROWTH, *ION BEAMS, *CLUSTERING, IONS, ACCELERATION, ENERGY ...

... A system which uses a beam of low energy positive ions to shape and ... together with a description of the linear positive ion accelerator developed ...

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 ...

Current research is described on pulsed power ion accelerators for inertial fusion, i.e., ion diodes and collective accelerators. Particle beam energy and power requirements for fusion, and basic deposition characteristics of charged particle beams are di...

Since the superconducting heavy ion linac ATLAS is an ideal post-accelerator for radioactive beams, plans are being developed for expansion of the facility with the addition of a driver accelerator, a production target/ion source combination, and a low q/...

Cooling and acceleration of ions by lasers has gained increasing attention over the last years. The common interest is to further increase the luminosity of ion beams, either by shrinking the phase space occupied by the beam, or simply via increasing the number of particles. Recently, laser ...

One of the objectives of the BNL Neutral Beam Development Group is to accelerate negative hydrogen ion beams to energies of several hundreds of kilovolts. In a first attempt, negative ions, produced from surface plasma sources, are extracted at around 15 ...

Laser-ion guiding is currently deployed on the Advanced Test Accelerator (ATA). Beam profiles are measured as a function of time by detecting optical emissions from foils inserted into the beam path. The beam size is observed to grow with time into the pu...

... Descriptors : *BETATRONS, *PROTON ACCELERATORS, COMPRESSION, STABILITY, ION BEAMS, MAGNETIC INDUCTION, HIGH ENERGY ...

A new method is proposed for collectively accelerating bunches of ions with an intense relativistic-electron beam. By varying the beam energy in time, acceleration of a slow Doppler-shifted cyclotron wave can be accomplished, without accompanying degradation of the beam ...

A program library based on the macro particle method for numerical simulation and optimization of multi-component ion beam transportation from ion sources to RFQ accelerators is presented. The latest version of library was applied for simulations of transverse dynamics of an argon ion ...

... 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 ...

... DEUTERON BEAMS, *PROTON BEAMS, IONS ... VALUE, GENERATORS, DECAY, BRASS, TITANIUM ... FISSION PROD PARTICLE ACCELERATORS ...

... Lithium ions emitted thermally from a betaeucryptite source are accelerated and focused into a ribbon beam by an electric field designed to ...

The acceleration of ions to many times the electron beam energy when an intense relativistic electron beam is injected through a localized ion source into an otherwise evacuated drift tube has been theoretically and experimentally studied. We present a si...

Several methods for imaging using accelerated heavy ion beams are being investigated at Lawrence Berkeley Laboratory. Using the HILAC (Heavy-Ion Linear Accelerator) as an injector, the Bevalac can accelerate fully stripped atomic nuclei from carbon (Z = 6...

In this paper we give an introductory discussion of high intensity hadron accelerators with special emphasis on the high intensity feature. The topics selected for this discussion are: Types of acclerator - The principal actions of an accelerator are to confine and to accelerate a particle beam. Focusing - This is ...

Ion beams injected into the ionosphere are known to produce waves related to the normal modes of the

A virtual cathode collective acceleration configuration is examined for use as a pulsed, intense ion injector. Numerical calculations of the collective acceleration have shown peak ion energies of several times that of the electron beam energy. This is co...

Apr 1, 1994... ELECTROSTATIC ENGINES; IMPINGEMENT; ION BEAMS; ION ENGINES; ION IMPACT; MATHEMATICAL MODELS; ACCELERATORS; CHARGE EXCHANGE; IONS; XENON; ...

This review is devoted to processes in electron-ion beams and rings. The fundamentals of the distribution-function moments method in electron-ion beam physics and its applications to the dynamics of multicomponent beams with noncoincident dimensions are presented. Ion ...

... can lead to serious emittance growth. ... ion channel motion on beam transport in ... Compact accelerators, Charged particle beams, Relativistic electron ...

Beam commissioning of a new 4 rod RFQ has started at Brookhaven National Laboratory (BNL). The RFQ will accelerate intense heavy ion beams provided by an Electron Beam ion Source (EBIS) up to 300 keV/u. The RFQ will accelerate a range of Q/M from 1 to ...

Photoionization of multiply charged ions is studied using the merged-beams technique at the Advanced Light Source. An ion beam is created using a compact 10-GHz all-permanent-magnet ECR ion source and is accelerated with a small accelerator. The ...

Selected examples of advanced accelerator concepts are reviewed. Such plasma accelerators as plasma beat wave accelerator, plasma wake field accelerator, and plasma grating accelerator are discussed particularly as examples of concepts for accelerating relativistic ...

One of the objectives of the BNL Neutral Beam Development Group is to accelerate negative hydrogen ion beams to energies of several hundreds of kilovolts. In a first attempt, negative ions, produced from surface plasma sources, are extracted at around 15 keV and accelerated ...

Numerical and analytic studies of collective ion acceleration in intense relativistic electron beams are presented. Investigation of autoresonant acceleration has shown that radial beam inhomogeneities distort the slow cyclotron wave into a surface-locali...

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)

Penning ion source and the positive ions are .accelerated across the beam acceleration gap and subsequently strike the titaniurn-tritiurn target. ...

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 preci...

The Ionization Front Accelerator (IFA) is a collective ion accelerator for which high-gradient particle acceleration has now been demonstrated. In the IFA, the space charge field at the front of an intense relativistic electron beam is controlled by a las...

An ion implantation device for creating a large diameter, homogeneous, ion beam is described, as well as a method for creating same, wherein the device is characterized by extraction of a diverging ion beam and its conversion by ion beam optics to an ...

An ion implantation device for creating a large diameter, homogeneous, ion beam is described, as well as a method for creating same, wherein the device is characterized by extraction of a diverging ion beam and its conversion by ion beam optics to an ...

The ionization of residual gas by an electron beam in an accelerator generates ions that can resonantly couple to the beam through a wave propagating in the beam-ion system. Results of the study of a beam-ion instability [1,2] are presented for a multi-bunch train taking ...

The effect of space charge forces on a small emittance beam shaping from the intense ion ring beam of the collective accelerator is considered. It is shown that the linear part of space charge forces could be compensated by changing parameters of forming ...

An ion acceleration mechanism is proposed in which ions are trapped and accelerated by a negative energy space charge wave. Under certain conditions, an electron beam propagating down a slowly converging metal guide can be accelerated. A low phase velocity space charge wave ...

The absence of time structure and the excellent beam and beam transport properties of tandem electrostatic accelerators make them an attractive choice for the acceleration of a large class of radioactive ion species produced with the ISOL technique. In this paper, considerations on the use of ...

A two year design study has been completed for medical ion accelerators with beams of sufficient range and intensity for therapy. The particles of main interest were ions between carbon and neon, but the generation of proton and neutron beams was studied ...

The term beta-beam has been coined for the production of a pure beam of electron neutrinos or their antiparticles through the decay of radioactive ions circulating in a storage ring. This concept requires radioactive ions to be accelerated to a Lorentz ga...

A method for performing accelerator mass spectrometry, includes producing a beam of positive ions having different multiple charges from a multicharged ion source; selecting positive ions having a charge state of from +2 to +4 to define a portion of the beam of positive ...

The US is developing the physics and technology of induction accelerators for heavy-ion beam-driven inertial fusion. The recirculating induction accelerator repeatedly passes beams through the same set of accelerating and focusing elements, thereby reduci...

Calculations are performed in a kinematic single-particle approximation to describe the beam emittance for the I-100 and MEGAN accelerators.(AIP)

There is an increasing interest in radioactive ion beams for astrophysics and nuclear physics research and applied programs. This interest has led to an International Conference on Radioactive Nuclear Beams and a Workshop on the Science of Intense Radioac...

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 ...

A superconducting heavy-ion accelerator is being installed to boost the energies of beams from the ANU 14UD pelletron. The design of the beam transport system and the calculated beam characteristics are described. Features include a waist-to-waist transve...

Accelerator systems capable of driving inertial fusion targets are described. They are based on linear induction accelerator technology coupled with new methods of beam transport using electron neutralization of ion space charge. The resulting accelerator...

The main ion beams acceleration facilities and research fields of the Institute of Modern Physics (IMP) are briefly introduced. Some of the experimental instruments, typical works and the obtained results on the materials research with swift heavy ions at the IMP accelerators are presented.

A cold-cathode penning ion gauge (PIG) source built with permanent magnet for the production of intense O- ion beam has been developed for the simultaneous acceleration of O- and O+ ion beams in a 1MV RFQ accelerator. O- ion ...

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 ...

An advanced technique, the ion beam tritium labelling method (IBTL), used for labelling proteins, peptides and other nonvolatile organic compounds is introduced. In this method the excited tritium ion beam is accelerated and then bombs a solid sample targ...

Neutral beam systems based on negative ions have been considered because of a high expected power efficiency. Methods for the production, acceleration and neutralization of negative ions will be reviewed and possibilities for an application in neutral beam lines explored.

The computer code BEAM is described, together with an outline of the formalism used for the ion optics calculation. The purpose of the code is to obtain the optimum parameters of devices, with which the ion beam is transported through the system without l...

A method is proposed in which an amplitude-modulated, rotating magnetic field is applied to an accelerated ion beam in a gas neutralizer to defocus the resultant neutral and ion beam in a controlled manner to control the intensity of the neutral beam alon...

The use of slow cyclotron beam waves is examined as a means of accelerating ions in intense relativistic electron beams. Field magnitudes of between 10/sup 5/-and 10/sup 6/ V/cm seem achievable in the near term, and while these will never reach the levels of beam front mechanisms, such as ...

Linear accelerators driven by pulse forming networks and utilizing beam neutralization may be useful for obtaining high-current ion beams for inertial fusion applications. Such accelerators may be subject to longitudinal velocity bunching instabilities. These instabilities are studied with a ...

The Holifield Radioactive Ion Beam Facility (HRIBF) construction project has been completed and the first radioactive ion beam has been successfully accelerated. The project, which began in 1992, has involved numerous facility modifications. The Oak Ridge Isochronous Cyclotron has been ...

Discussions are given of the general arrangements of the injection system, the principles of the Alvarez structure of the proton accelerator, the ion source, the 500-kev pre-accelerator, beam focusing between the source and the accelerator, the beam buncher, ...

A virtual cathode collective acceleration configuration is examined for use as a pulsed, intense ion injector. Numerical calculations of the collective acceleration have shown peak ion energies of several times that of the electron beam energy. This is consistent with a variety of experiments. ...

A virtual cathode collective acceleration configuration is examined for use as a pulsed, intense ion injector. Numerical calculations of the collective acceleration have shown peak ion energies of several times that of the electron beam energy. This is consistent with a variety of experiments. ...

Recent proposals for using plasma wakefield accelerators (PWFA) as a component of a linear collider have included intense electron beams with densities many times in excess of the plasma density. The beam's electric fields expel the plasma electrons from the beam path to many beam ...

A combined electron- and ion-beam system employing a double-chamber plasma source and a single accelerator column has been developed to provide focused electron and positive-ion beams simultaneously, with no need for a separate electron source or accelerating column for sample neutralization. ...

There are only a very few critical parameters which determine the size, performance and cost of a heavy ion accelerator. These are the mass of the heaviest ion desired, the maximum range of this heaviest ion in tissue, and the highest intensity desired. Other parameters, such as beam emittance, ...

The existing superconducting linac ATLAS is in many respects an ideal secondary beam accelerator for an ISOL (Isotope separator on-line) type radioactive beam facility. Such a facility would require the addition of two major accelerator elements: a low charge state injector for the existing heavy ...

The dual ion beam accelerator system has been developed for simulation studies of neutron radiation damage of structural materials for nuclear fusion and fission reactors. One accelerator is used to accelerate two different kinds of ions, which are generated in the ...

Vacuum arc ion sources, Penning ion sources, and filament driven multicusp ion sources are used for the production of high current ion beams of a variety of metallic and gaseous ions at the GSI accelerator facility. For accelerator ...

Vacuum arc ion sources, Penning ion sources, and filament driven multicusp ion sources are used for the production of high current ion beams of a variety of metallic and gaseous ions at the GSI accelerator facility. For accelerator ...

An ion source is described which produces, accelerates, and focusses ion beams for such elements as Mo, Pd, Fe, and Cu. An ionized vapor of the element is drawn to a negatively charged electrode of the same element where ions are sputtered off and extracted by a magnetic field. (T.R.H.)

Neutral Injection was first used forty years ago for the acceleration of He ions by tandem accelerators, before the advent of the negative He ion source. Later, almost universal sputter-negative-ion sources were developed and the use of neutral injection fell into disuse for nuclear physics ...

Negative halogen ions have recently been proposed as a possible alternative to positive ions for heavy ion fusion drivers because electron accumulation would not be a problem in the accelerator, and if desired, the beams could be photo-detached to neutral...

An ion bean buncher was developed at ANL for bunching all ion species through a tandem accelerator. Transit time variations through the tandem, caused by ripple and fluctuations in the injection and lens power supplies and terminal voltage, and to varying voltage distributions in the accelerating tube, cause a ...

In order to determine position, dimensions and intensities of multiply charged ion beams at the mVINIS Ion Source, a novel method was developed based on a fluorescent screen and a commercial digital TV camera. The spatial characteristics of multiply charged ion beams (for example the ionization ...

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 ...

We address the problem of developing system models that are suitable for studying the control of the longitudinal beam dynamics in induction accelerators for heavy ions. In particular, we present the preliminary results of our efforts to devise a general ...

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...

The acceleration of heavy ions to relativistic energies (T greater than or equal to 1 GeV/amu) at the beam intensities required for fundamental research falls clearly in the domain of synchrotons. Up to date, such beams have been obtained from machines or...

A relatively long-pulse width (0.1--1 [mu]s) intense ion beam accelerator has been built for materials processing applications. An applied [ital B][sub [ital r

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 ...

... the absorbing material. There are differences in the radial energy deposition densities for radiation beams of the same LET among accelerated ion species because of a difference in their electric charge an...

The purpose of the program was to investigate physical phenomena associated with high flux ion beam generation and to develop technology for intense ion beam accelerators with pulselengths in the ms range. At the time the work was initiated, the chief are...

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 ...

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 ...

A review is given of problem areas in beam transmission which are frequently encountered during the design, operation and upgrading of electrostatic accelerators. Examples are provided of analytic procedures that clarify accelerator ion optics and lead to...

Several practical aspects of rf acceleration (by a MEQALAC accelerator, for example) of positive and negative ions for MFE neutral injection were considered. The beam transport, gas flow, differential pumping, and compatibility with MFE beam lines were ex...

Cumulative beam breakup in linear accelerators has been studied extensively for the case of infinitely short bunches. While this model is appropriate for high energy accelerators, in high-current ion accelerators the bunch length can occupy a significant ...

... Descriptors : *TRITIUM, *PARTICLE ACCELERATOR TARGETS, *NEUTRON FLUX, SOURCES, DEUTERON REACTIONS, TRITON BEAMS, ION ...

... CARLO METHOD, COMPUTER APPLICATIONS, MULTIPLE BEAMS( RADIATION), SPIN RESONANCE, BETATRONS, SYNCHROTRONS, ION ...

A system is described that combines geometrical and electrostatic focusing to provide high ion extraction efficiency and good focusing of an accelerated ion beam. The apparatus includes a pair of curved extraction grids (16,18) with multiple pairs of aligned holes positioned to direct a group of beamlets (20) along ...

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 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...

A virtual cathode collective acceleration configuration is examined for use as a pulsed, intense ion injector. Numerical calculations of the collective acceleration show peak ion energies of several times that of the electron beam energy. The late time behavior is to ...

Since the superconducting heavy ion linac ATLAS is an ideal post-accelerator for radioactive beams, plans are being developed for expansion of the facility with the addition of a driver accelerator, a production target/ion source combination, and a low q/m pre-accelerator ...

There is a growing interest in the scientific community in the use of accelerators to produce relativistic heavy ion beams for a number of purposes. It now appears that relativistic heavy ion collisions may provide an opportunity to study nuclear matter far from equilibrium density, pressure, and temperature. Heavy ...

To date, most resources for ion beam fusion have been devoted to development of accelerators and target physics; relatively few resources have gone into ion beam transport development. Because of theoretical studies and substantial experience with electron beam transport, ...

A new beam line for radiotherapy and radiosurgery with accelerated helium-ion beams has been set up at the Bevalac. The new treatment room has been equipped with a very precise patient positioner in order to utilize the superior dose localization properties of light-ion ...

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 scheme for collectively accelerating ions trapped in a space charge wave supported by an intense relativistic electron beam is disussed. In this scheme ions are trapped in the potential well of a low phase velocity space charge wave and accelerated by g...

A double-foil target is proposed for laser ion acceleration with thin targets to take advantage of high efficiency of such targets while avoiding beam degradation in late stage of acceleration. Laser heating of electrons co-moving with the ion beam is stopped by the second ...

A highly charged heavy ion injector using an all permanent magnet type electron cyclotron resonance ion source (ECRIS) has been constructed in the high voltage terminal of the vertical and folded type 20UR Pelletron tandem accelerator at Japan Atomic Energy Agency at Tokai. The new in-terminal injector made it possible to ...

ATLAS, the Argonne Tandem-Linac Accelerator System, is a project to upgrade the existing Argonne superconducting linac heavy-ion booster which began providing beams of heavy-ions for experimental nuclear research in 1979. When completed ATLAS will provide beams of heavy ...

The original purpose of this research was an investigation into the use of slow space charge waves on weakly relativistic electron beams for ion acceleration. The work had three main objectives namely, the development of a suitable ion injector, the growth and study of the properties of slow space charge waves on ...

The paper reviews the literature on collective ion acceleration in high-current electron beams. Consideration is given to ion acceleration: (1) during propagation of a high-current electron beam in low-pressure gas, (2) in vacuum diodes with dielectric anodes, (3) during ...

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, ...

support for the Los Alamos Neutron Science Center (LANSCE). AOT's R&D efforts include plasma physics, ion beam generation; accelerator physics, engineering, design;...

... source. Mercury ion beams of 0.03 to 0.44 ampere were operated at net accelerating voltages of 900 to 6100 volts. A multihole ...

A variable energy, constant current ion beam accelerator structure is disclosed comprising an ion source capable of providing the desired ions, a pre-accelerator for establishing an initial energy level, a matching/pumping module having means for focusing means for ...

Certain features of the focusing instability of an electron beam in a longitudinal magnetic field of arbitrary strength in the presence of an ion component are examined from the viewpoint of the possible use of this instability for collective acceleration of ions in accelerons. The dispersion relation for a ...

The present work investigates the computer analysis of the ion beam properties produced by a Freeman type system. The extraction for such system is composed of four electrodes that permit to keep a fixed output energy by means of two accelerating gaps and one decelerating gap. The latter allows reducing the beam ...

During the past two years, significant experimental and theoretical progress has been made in the U.S. heavy ion fusion science program in longitudinal beam compression, ion-beam-driven warm dense matter, beam acceleration, high brightness beam transport,...

The authors discuss the physical, chemical, and structural changes occurring in a number of metals and alloys under irradiation by ion beams, and the potential for using ion beams to optimize such properties as corrosion resistance and microhardness and such processes as crystal doping and annealing. They present ...

The current density distribution in an ion beam is close to the Gauss error curve. The ion beam pulsates with a frequency equal to the frequency of acceleration. A aitempt is made to explain the pre-axial density peak and pre- anxial luminescence. It is postulated that the diameter of ...

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...

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...

Adiabatic ion bunching is achieved in a cyclotron axial ion injection system through the incorporation of a radio frequency quadrupole system, which receives ions from an external ion source via an accelerate-decelerate system and a focusing einzel lens s...

For storing heavy ion beams in storage rings or accelerating them with synchrotrons, high frequency cavities accomplish the important roles. In the Institute for Nuclear Study, University of Tokyo, the heavy ion storage ring called TARN and the cooler syn...

With the development of the new arc-heated cathode PIG type source, heavy-ion acceleration in the SF cyclotron has been drastically augmented, which means that a stable routine operation is being realized as well as the number of ion species being increas...

... for Research Development Test and Evaluation ... limit of heavy charged beams ... ACCELERATORS, NEUTRALIZATION, ION SOURCES, PARTICLE ...

... ments are required. Beam extraction and ion instability growth and satu- ... of low v/y beams in IFR channels. The parameters used in the simulations ...

This contribution will provide an overview of the experimental nuclear astrophysics projects pursued with stable and radioactive beams at the CSM accelerator laboratory, the Holifield Radioactive Ion Beam Facility (HRIBF) at ORNL and at the TRIUMF facility in Vancouver.

This report discusses the following experimental and theoretical developments: traveling wave tube amplifiers; coaxial beam amplifiers; ferroelectric ceramics; and microwave systems. (LSP)

... In the case of REX-ISOLDE, the post accelerator at the CERN-ISOLDE radioactive beam facility, a unique system for beam preparation is used. ...

Four accelerator parameters were found to control the condition of the electron beam entering the Intergrated Fast Reactor (IFR). These parameters were the matching of the electron beam to the ion channel, the laser timing, the benzene pressure at the ent...

A high current low emittance high charge state heavy ion beam source is being developed. This is designed to deliver HIF (heavy ion fusion) driver accelerator scale beam. Using high-charge-state beam in a driver accelerator for HIF may increase the ...

Method and apparatus for monitoring characteristics of a high energy neutral beam. A neutral beam is generated by passing accelerated ions through a walled cell containing a low energy neutral gas, such that charge exchange neutralizes the high energy ion beam. The neutral ...

+ ion beam, accelerated by the continuously tuned co-propagating laser, as a function of the beam the #12;nal beam velocity is determined by the counter-propagating laser. From a) to c) the frequency detuning (#12;g. 2a), the ion beam comes into ...

The design and performance of a simple two element electrostatic lens which maintains good beam focal quality for the acceleration and deceleration of heavy ion beams, of high intensity, over a wide range of energy ratios is described. Experimental result...

A high current low emittance high charge state heavy ion beam source is being developed. This is designed to deliver HIF (heavy ion fusion) driver accelerator scale beam. Using high-charge-state beam in a driver accelerator for HIF may increase the ...

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)

Reflection and acceleration of resonant particles by solitons have been studied numerically in an ion-beam plasma system based on a hybrid code. A soliton whose velocity is less than the beam velocity is amplified first in a self-similar way because of the beam bunching up to the onset of reflection and then is ...

The current limits of magnetic focusing systems are examined and approximate formulas for long solenoids and periodic channels with short lenses (solenoids and quadrupole doublets) are derived. The characteristics and limitations of conventional sources, pulsed ion diodes, and collective-field accelerators for the generation of intense, energetic ...

The results of the calculation of the dynamics of 48Ca+6 ion beam acceleration in the central region of the U-400 cyclotron with an inner PIG type ion source are presented. The acceleration coefficients for two different positions of the ion source-puller...

Accelerator technology development is presented for heavy ion drivers used in inertial confinement fusion. The program includes construction of low-velocity ''test bed'' accelerator facilities, development of analytical and experimental techniques to characterize ion ...

The acceleration of ions to many times the electron beam energy when an intense relativistic electron beam is injected through a localized ion source into an otherwise evacuated drift tube has been theoretically and experimentally studied. We present a simple picture of the ...

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 self-similar solution of the ion energy distribution agrees ...

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 self-similar solution of the ion energy distribution agrees ...

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 self-similar solution of the ion energy distribution agrees ...

Dynamics of particles in linear ion accelerator is investigated. Self-consistent distribution of phase density is obtained for intense ion beams in which longitudinal dimensions of buncher by far exceed the transverse ones. Inconsistency is considered of ...

A plan has been developed to inject ion beams from the Brookhaven Tandem or a cyclotron added to the Tandem into the AGS. This beam could then be injected into a relativistic heavy ion collider. The availability of many CBA components adds to the attractiveness of this proposal.

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...

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, ...