Results 251 to 260 of about 309,738 (293)

Ion analysis of rf-excited deuterium ion sources

Nuclear Instruments and Methods, 1971
Measurements have been made of the D1+, D2+ and D3+ ion output from glass- and alumina-walled rf ion sources designed for use in high-output sealed-off D/T neutron generators. Although in a sealed-off neutron generator, the ion source necessarily contains a large ecoled metal surface to absorb highpower secondary electrons from the ion accelerator ...
D.S. Stark, A.W.J. Manley
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Characteristics of multiantenna rf ion source

Review of Scientific Instruments, 2006
We have developed a new multiantenna rf ion source for neutral beam injection and studied the effects of different antennas, connected in parallel, on the hydrogen plasma characteristics. The four-antenna elements 20 cm long are installed inside the 35×35×21 cm3 rectangular bucket chamber. The maximum rf power of 40 kW at 9 MHz is used. The ion current,
T. Shoji, Y. Oka
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Characteristics of multiantenna rf ion source

Review of Scientific Instruments, 2004
A multiantenna rf ion source is studied. The new antenna system is developed to reduce the rf voltage on the antenna compared to that of the conventional loop antenna, which can reduce high voltage rf breakdown on antennas. The antenna was installed in a 1/6 scale ion source for the neutral beam injector (NBI) (H−) used in large helical devices.
Y. Oka, T. Shoji, M. Hamabe, Y. Sakawa, T. Suzuki, K. Ikeda, O. Kaneko, K. Nagaoka, M. Osakabe, Y. Takeiri, K. Tsumori, E. Asano, T. Kawamoto, T. Kondo, M. Sato   +14 more
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The Frankfurt RF-driven ion source

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2000
Abstract An RF-driven volume ion source based on the high efficiency ion source (HIEFS) has been developed at the Institut fur Angewandte Physik in Frankfurt. The RF-driven ion source operates at a frequency of 3.5 MHz with a maximum duty factor of 10%.
P Beller, R Hollinger, H Klein, A Maaser, K Volk, M Weber   +5 more
openaire   +1 more source

An RF ion source model for H-production

Plasma Sources Science and Technology, 2019
A 1D model of an RF driven ion source based on ionisation by thermal electrons is presented. The RF source differs from traditional filament and arc ion sources because there are no primary electrons present, and is simply composed of an antenna region (driver) and a main plasma discharge region.
I Turner, A J T Holmes, J Zacks, R McAdams   +3 more
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rf Absorption and Ion Heating in Helicon Sources

Physical Review Letters, 2002
Experimental data are presented that are consistent with the hypothesis that anomalous rf absorption in helicon sources is due to electron scattering arising from parametrically driven ion-acoustic waves downstream from the antenna. Also presented are ion temperature measurements demonstrating anisotropic heating (T( perpendicular)>T(parallel)) at the ...
J L, Kline, E E, Scime, R F, Boivin, A M, Keesee, X, Sun, V S, Mikhailenko   +5 more
openaire   +2 more sources

RF Negative Ion Sources and Polarized Ion Sources

2016
The requirement of a neutral beam injection system with hydrogen or deuterium beam energy up to 1 MeV for the ITER project has recently triggered new research on negative ion sources, from production to acceleration and neutralization before the injection in the tokamak.
N. Ippolito, F. Taccogna, P. Minelli, V. Variale, N. Colonna   +4 more
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Thermal model of RF ion thrusters and ion sources

Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques, 2015
A model for calculating the temperature in an ion source with plasma heating by a radio-frequency MHz electromagnetic field is presented. The heat fluxes caused by the discharge plasma distributed over the ion-source surfaces are determined. In the model it is accepted that the heat transfer between ionsource elements is performed by radiation and heat
V. K. Abgaryan, K. I. Kruglov
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Structure design and analysis of RF ion source for negative ion source test facility

Review of Scientific Instruments, 2019
A negative ion source acts as a critical part in a neutral beam injector (NBI). A high current ion source is required for the high-power NBI. In this paper, a prototype radio frequency (RF) ion source and its test facility are developed in the Institute of Plasma Physics, Chinese Academy of Sciences, to demonstrate the key technology of the high power ...
Yuming Gu, Yahong Xie, Jianglong Wei, Yongjian Xu, Jun Li, Caichao Jiang, Lizhen Liang, Yuanlai Xie, Chundong Hu   +8 more
openaire   +2 more sources

RF H⁻ Ion Source with Saddle Antenna

2010
In this project we are developing an RF H⁻ surface plasma source which will synthesize the most important developments in the field of negative ion sources to provide high pulsed and average current, high brightness, good lifetime, high reliability, and higher power efficiency.
Dudnikov, Vadim, Dudnikova, Galina, Johnson, Rolland, Stockli, Martin, Welton, Robert   +4 more
openaire   +1 more source