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...
National Technical Information Service (NTIS)
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 ...
Table sugar samples were irradiated with accelerated carbon ions and fast neutrons. Electron paramagnetic resonance (EPR) analysis performed after the irradiation revealed a complex spectrum similar to that observed after gamma-ray irradiations. The total concentration of the paramagnetic centers induced by ...
PubMed
Collective carbon ion acceleration in relativistic electron beam of Start accelerator is studied. It is shown that ion acceleration is performed by a virtual cathode potential well moving self-consistently with the motion of ion flux front and ...
The primary life-limiting mechanism for state-of-the-art ion thrusters is erosion of the accelerator
NASA Technical Reports Server (NTRS)
One of the research problems presented by GANIL, the planned, large, French national heavy ion accelerator, is the stripping of heavy ions with carbon foil. The first part of an experimental study of this problem is reported. Definitions, according to GAN...
Interaction III occurs when a molybdenum atom set in motion by the collision cascade from an incom- ing xenon ion strikes a carbon surface atom. This pro- ...
NASA Website
Ultrasonic inspection of the first set of accelerator grid laminates uncovered intraply delaminations which were resolved in the second set by using an improved ...
... Descriptors : *Linear accelerators, *Ion accelerators, *Particle accelerator components, *Electron accelerators, *Proton accelerators, Electron beams ...
DTIC Science & Technology
... (Author). Descriptors : *ION ACCELERATORS, ELECTROMAGNETS, ION BEAMS, FOCUSING, RINGS, USSR, LINEAR ACCELERATORS. ...
The compact, high current, 2.45 GHz microwave-driven plasma ion source which was built for the Chalk River TASCC facility is presently being adapted for testing as a gas ion source for accelerator mass spectrometry, at the Woods Hole Oceanographic Institution accelerator mass spectrometer. The special requirements ...
Energy Citations Database
The results of several years of operation with heavy to very heavy ions in the GANIL accelerators, along with specific measurements concerning stripping through carbon foils, led to a set of valuable recipes for predicting the characteristics required to ...
A discussion is given of the advantages and disadvantages of thin carbon foil strippers for heavy ion beams from tandem electrostatic accelerators. Foil lifetimes were increased by radiative heating and by the evaporation of a thin layer of gold on the foil. (PMA)
Carbon ion beams have superior dose distribution allowing selective irradiation to the tumor while minimizing irradiation to the surrounding normal tissues. Furthermore, carbon ions produce an increased density of local energy deposition with high-energy transfer (LET) components, resulting in radiobiological ...
Theoretical investigations show that linearly and radially polarized multiterawatt and petawatt laser beams, focused to subwavelength waist radii, can directly accelerate protons and carbon nuclei, over micron-size distances, to the energies required for hadron cancer therapy. Ions accelerated by radially polarized ...
NASA Astrophysics Data System (ADS)
We report stable laser-driven proton beam acceleration from ultrathin foils consisting of two ion species: heavier carbon ions and lighter protons. Multidimensional particle-in-cell simulations show that the radiation pressure leads to very fast and complete spatial separation of the species. The laser pulse does ...
An injector of intense beams of carbon ions is described. The device uses an array of carbon plasma guns to inject ions directly into a magnetically insulated acceleration gap. Ion currents exceed 3 kA with beam energies between 100 and 300 keV (for C+) and 200 and 600 keV ...
A novel numerical modeling of field ionization in PIC (Particle In Cell) codes is presented. Based on the quasistatic approximation of the ADK (Ammosov Delone Krainov) theory and implemented through a Monte Carlo scheme, this model allows for multiple ionization processes. Two-dimensional PIC simulations are performed to analyze the cut-off energies of the laser-accelerated ...
for a carbon RFQ. The FETS RFQ field map is generated by the RFQSIM code using the first eight terms The PAMELA project aims to design an ns-FFAG accelerator for cancer therapy using protons and carbon ions [1]. For the injection system for carbon ions, an RFQ is one option ...
E-print Network
The use of mechanically slackened, or wrinkled, foils as stripper foils in the tandem electrostatic accelerator is discussed as a means of increasing foil life is discussed. Performance of such foils is shown. (GHT)
DOE Information Bridge
A new heavy ion injector linac is proposed for providing heavy ion beams to a fixed field alternating gradient (FFAG) accelerator in Kyushu University. A combination of the new intense laser source based injector and the FFAG will be able to accelerate high current ion beams with 100 Hz of a ...
Operational problems in the production and acceleration of /sup 14/C beams for nuclear structure research in Los Alamos National Laboratory's Van de Graaff accelerators are discussed. Methods for the control of contamination in ion sources, accelerators and personnel are described. Sputter source target ...
... warfare, joint planning, national and international ... a space charge wave accelerator. ... BEAMS, *ION ACCELERATORS, *PLASMA ACCELERATORS ...
