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)
Energy Citations Database
... tools are suitable sources and accelerators of multiply charged ions; x-ray, soft x-ray, and extreme ultraviolet spectrometers; electron spectrometers ...
DTIC Science & Technology
An ion source test facility was constructed for making fundamental measurements of the properties of Penning ion sources. The extracted ion energies from the source can be up to 36 x q (keV), where q is the ion charge. Both negative and multiply charged positive ions were extracted from the source. The facility has high ...
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 ion beam is merged with a photon beam from an undulator to allow ...
There is a growing interest in the use of beams of multiply charged ions produced in special environments like high voltage platforms, Dynamitrons, Van-de-Graaff accelerators or on-line production systems for radioactive beam facilities. A compact 10 GHz ...
National Technical Information Service (NTIS)
Plasma photographs are obtained in the radiation of individual spectral lines of multiply charged carbon, calcium iron, and nickel ions in the region ..cap alpha..approx.100 A. A joint analysis of the photographs of the plasma and of the spectra with spatial resolution has made it possible to trace the acceleration of the ions, to ...
ECR (Electron Cyclotron Resonance) ion sources are now in widespread use for the production of high quality multiply charged ion beams for accelerators and atomic physics experiments, and industrial applications are being explored. Several general charact...
The possibility of simultaneously accelerating particles with a range of charge-to-mass ratios ( ~20%) to the same energy is proposed and demonstrated for a superconducting linac. Uranium ions stripped in a foil with eight charge states have been accelerated through a portion of the ATLAS linac from 286 to 690 MeV, ...
NASA Astrophysics Data System (ADS)
The possibility of simultaneously accelerating particles with a range of charge-to-mass ratios ( approximately 20%) to the same energy is proposed and demonstrated for a superconducting linac. Uranium ions stripped in a foil with eight charge states have been accelerated through a portion of the ATLAS linac from ...
PubMed
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 states of Ar2+ to ...
This report summarizes research progress in accelerator-based studies of atomic structure and decay characteristics of excited states in multiply charged ions. This work involves spectroscopic measurements in visible to extreme ultraviolet wavelength regions of atomic transitions involving Rydberg states and low-lying excited states in ...
Production and acceleration system of multiply charged C60 and C70 fullerene ions are being designed for basic studies on cluster physics. Multiply charged fullerene ions are produced by electron impacts. Ions selected by the analyzing magnet are accelerated up to 100 kV ...
... iteration. Typically, k >> m. If the multiply and add times were ... If the multiply time is signigicantly slower than the add time, as is generally ...
A crossed-beam study of the electron impact excitation and ionization of N(+4) is described. A beam of N(+4) ions with MeV energy is produced in a Van de Graaff accelerator coupled with a gas stripper and separated from other charge states by magnetic and...
Continuous channel electron multiplier with saturated pulse independent of excitation for low energy
NASA Technical Reports Server (NTRS)
A series of abstracts is given on the subjects of theory for multiply charged ions and low- and high-energy collisions involving multiply charged ions. 23 refs.
DOE Information Bridge
The construction and characteristics are given for an electron multiplier designed for recording low-energy charged particles. (tr-auth)
An experimental investigation of the electron impact excitation and ionization cross sections of N(4+) is described. A Van de Graaff accelerator coupled with a gas stripper was used to produce a beam of 2.7 MeV N(4+) ions which were separated from other c...
Heavy-ion beams at the INS SF cyclotron have been developed since the first beam was obtained in 1974. Multiply-charged heavy ions of gaseous material lighter than Ne have been successfully accelerated. An internal ion source for solid material has been m...
A new injection system designed for a variable energy RFQ (radio frequency quadrupole) accelerator was developed from the viewpoint of introducing a high current ion beam into the RFQ. This injection system consists of a high current multiply charged ion source, a sector-type mass-separator, and a magnetic quadrupole triplet. The ion ...
At ISOLDE, CERN, an online PHOENIX ECR charge state breeder is being tested for the investigation of the 1?n scenario for the next generation ISOL postaccelerators. As the program of tests reaches an end, the possible physics experiments with multiply charged radioactive ion beams are being investigated. Especially the use of the ECR ...
The yield of metal ions from an arc source as a function of the temperature of the discharge chamber is studied. Beams of heavy ions have found wide use in diverse areas of science and technology. For example, heavy-ion sources are used in simulation accelerator experiments which greatly expedites the receipt of data on the radiation strength of structural materials for fast ...
Calculations regarding trapping, retention, transfer, and acceleration of charged particles in earth
... Accession Number : AD0646930. Title : NONFERROUS ACCELERATOR OF CHARGED PARTICLES,. Corporate Author ...
An instrument is described for displaying intensity profiles of charged- particle beams that emerge from high-energy accelerators. The intensity vs. position on a strip of 2l scintillation counters each 1 by l cm appears as a histogram on an oscilloscope. The display is accomplished by employing transistor circuits to amplify and integrate the ...
A proposed new facility for the study of highly charged heavy ions is described. The basic elements of APIPIS, the Atomic Physics Ion-Photon Interaction System, are: (1) a source of multiply-charged ions; (2) a linear accelerator; (3) a synchrotron storage ring; and (4) a source of high brightness x rays. The placement of a heavy ion ...
A prototype of the HELIOS-12 single-chamber multiply charged ion source is described, which operates on the principle of electron cyclotron resonance and is designed for pulsed ion accelerators. The magnetic system of the source, which forms both longitudinal and transverse (hexapole) fields, contains only permanent magnets of SmCo/sub ...
Classical radiation from an accelerated charge is reviewed along with the reciprocal topic of accelerated observers detecting radiation from a static charge.
Transmutation of minor actinides and fission products using proton accelerators has many advantages over a transmutor operated in a critical condition. The energy required for this transmutation can be reduced by multiplying the spallation neutrons in a subcritical assembly surrounding the spallation target. The authors have studied the relation between ...
The radio-frequency quadrupole (RFQ) accelerator has been developed to generate high-current ion beams for a wide variety of applications. It has also been suggested that this type of accelerator could be used to produce megawatt ion beams to heat thermonuclear reactor plasmas. For a tokamak reactor, an RFQ accelerator can be designed ...
We present initial results obtained with a plasma wakefield accelerator driven by a train of microbunches. The microbunch train is produced with a masking technique [P. Muggli et al., this conference]. The plasma is produced in a cm-long gas-filled capillary discharge. The plasma density is measured using Stark broadening of the hydrogen H-alpha line. It is adjusted such that ...
... Descriptors : *Linear accelerators, *Particle accelerators, Pulse generators, Charged particles, Inductance, Capacitance, Translations, USSR. ...
... Descriptors : *PARTICLE ACCELERATORS, CYCLOTRONS, IONS, LINEAR ACCELERATORS, MAGNETIC PROPERTIES, MATRICES ...
A mass spectrometer determines the mass of multiply charged high molecular weight molecules. This spectrometer utilizes an ion detector which is capable of simultaneously measuring the charge z and transit time of a single ion as it passes through the detector. From this transit time, the velocity of the single ion may then be derived, ...
Jan 22, 2011 ... Title: Fraction and quenching cross-section measurements of multiply-charged metastable ions by a one-shot gas puff method ...
NASA Website
For the high current injector project at Inter University Accelerator Centre, a high temperature superconducting electron cyclotron resonance (ECR) ion source, PKDELIS, would provide the high charge state ions. The emittance of the ECR ion source is an important parameter to design further beam transport system and to match the acceptances of the ...
The effect of charge exchange processes on the angular distributions of quasi-isotropic beams of multiply charged ions passed through oriented crystals has been numerically simulated and the recently found effects of cooling and heating of the ion beams have been interpreted.
Methods for producing multiply-charged ions at different charge states and energies were discussed in the context of the facilities and capabilities that are part of the atomic physics program at Brookhaven. Examples were given of some of the experiments ...
Charge transfer at electron-volt energies between multiply charged atomic ions and neutral atoms and
... Title : Evaluated Theoretical Cross-Section Data for Charge Exchange of Multiply Charged Ions with Atoms. III. Nonhydrogenic Target Atoms,. ...
... warfare, joint planning, national and international ... a space charge wave accelerator. ... BEAMS, *ION ACCELERATORS, *PLASMA ACCELERATORS ...
A radiation or charged particle detector is described which incorporates a channel multiplier structure to amplify the detected rays or particles. The channel multiplier structure has a support multiplying element with a longitudinal slot along one side. ...
Plasma propulsion is of interest for space exploration because the high exit velocity of the propellant, compared to that of chemical means, generates a high final spacecraft velocity with reduced propellant mass. This project evaluates the viability of using plasma in a magnetic mirror to produce multiply charged ions as propellant. Electron cyclotron ...
ECR (Electron Cyclotron Resonance) ion sources are now in widespread use for the production of high quality multiply charged ion beams for accelerators and atomic physics experiments, and industrial applications are being explored. Several general characteristics of ECR sources explain their widespread acceptance. For use with ...
A secondary emission multiplier having exceptionally high output signal current is described. In previous multiplier tubes the output signal current was limited by the space charge surrounding the electrodes. The present multiplier tubes provides a source of ions within the tube adjacent the anode to ...
DOEpatents
This report describes an accelerated multiplier method for solving the general nonlinear programming problem. The algorithm poses a sequence of unconstrained optimization problems. The unconstrained problems are solved using a rank-one recursive algorithm...
An apparatus for electron multiplication by transmission that is designed with at least one foil having a front side for receiving incident particles and a back side for transmitting secondary electrons that are produced from the incident particles transiting through the foil. The foil thickness enables the incident particles to travel through the foil and continue on to an anode or to a next foil ...
A statistical approach to transfer ionization is used to calculate multiple-ionization probabilities for target ions produced in slow multielectron-capture collisions of multiply charged ions and atoms.
A proportional multiplier is coupled with a scintillation counting device in appropriate combination to detect and count low-energy charged subatomic particles, such as beta particles. The proportional multiplier portion of the combination imposes across ...
Photoionization of multiply charged ions is studied using the merged-beams technique at the Advanced Light Source. Absolute photoionization cross sections have been measured for a variety of ions along both isoelectronic and isonuclear sequences.
The review of the base results on production of multiply charged heavy ions of solids and gases from the PIG ion source with indirectly heated cathode is presented. The main features of the ion source design and operation are described. The results of the...
The important role of indirect-ionization mechanisms in electron-impact ionization of multiply charged ions has been emphasized by some recent experiments conducted with the ORNL-ECR multicharged ion source. Illustrative examples of investigations of the ...
At collision velocities which are slow compared to the motion of the ls hydrogenic electron, electron capture by multiply charged ions from hydrogen atoms is best characterized in terms of a quasimolecular model for the interaction. The capture process is...
Quite early in the mid-70s, it had become apparent that data on recombination of multiply charged ions was urgently needed for accurate modelling of fusion plasmas and coincidentally to test theories of dielectronic recombination which were beginning to d...
Experimental measurements of cross sections for collisions of multiply charged ions with atoms at the lowest attainable collision energies are reported. Emphasis is on electron capture from hydrogen atoms by multiply charged ions at energies below 1 keV/a...
There is a growing interest in the use of beams of multiply charged ions produced in special environments like high voltage platforms, Dynamitrons, Van-de-Graaff accelerators or on-line production systems for radioactive beam facilities. A compact 10 GHz ECR ion source (200 mm long, 170 mm diameter) has been developed and tested. The ...
A low cost, low power ECR ion source designed for the use on a high voltage platform with limited electrical power available, has been developed. To reduce the power consumption of the source the radial and axial magnetic confinement are produced entirely by permanent magnets. An axial magnetic mirror ratio of 2.7 is obtained by a configuration of two times four block magnets. A radial magnetic ...
... Title : THE FLUX OF COSMIC RAY PARTICLES WITH Z > OR = TO 2 ... Abstract : The fluxes of multiply charged cosmic ray particles have ...
to appear in the book The Physics of Multiply and Highly Charged Ions ..... In this scenario highly-stripped solar-wind ions interact ...
... theories is developed for determining the excited level populations and the ionization-recombination balance of multiply-charged atomic ions in an ...
... Descriptors : *IONS, *GRAPHITE, *COATINGS, *ELECTRODES, *COBALT COMPOUNDS, REPRINTS, CATIONS, COMPLEX COMPOUNDS, FILMS ...
... FOURIER TRANSFORMS, FAILURE(ELECTRONICS), ADDITION, ARITHMETIC UNITS, REGISTERS(CIRCUITS), ELECTRONIC MULTIPLIERS. ...
A simple modification was made in thermal of a 2-MV single end Van de Graaff accelerator that allows the acceleration of multiply charged ions. Argon ions of charge 2+ to 5+ were produced, extending the energy range of the machine to 10 MeV. Further improvements to enhance the overall ...
The status of experimental research and ongoing development and upgrade of MEVVA-type ion sources over the last two years since the previous ICIS-95 is reviewed. There are two main application fields for this ion source: heavy ion accelerators and material surface implantation technology. For particle accelerator ion injection to ...
... Accession Number : ADA100936. Title : The Space-Charge Resonance Accelerator. Descriptive Note : Final rept.,. Corporate ...
This paper describes the production of multiply charged ions induced by collisionless multiphoton ionization of rare gases at 532 and 1064 nm. The production of multiply charged ions emphasizes atomic properties and laser characteristics. Multiphoton absorption is expected to selectively excite high ionic energy ...
of the interactions of multicharged ions, charged and neutral molecules, and atoms with electrons, atoms, ions, surfaces, and solids. Our group's research underpins the...
Science.gov Websites
The role played by shock-associated drifts during the diffusive acceleration of charged particles at
The process of charged particle acceleration in interplanetary shocks has been simulated for typical
