期刊
PHYSICS OF PLASMAS
卷 16, 期 3, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.3080200
关键词
ionisation; plasma collision processes; plasma simulation; plasma transport processes; vircators
资金
- Israel Ministry of Science, Culture and Sport
- Russian Foundation for Basic Research [06-02-72007-MNTI-a]
- Dynastiya Foundation
- RFBR [09-02-00255]
The effect of mobile ion background on the dynamics of a planar virtual cathode with retarding field is investigated. The ions appear in the diode gap due to ionization of a neutral gas by the electron beam. Detailed examination of the self-consistent processes of the virtual cathode dynamics, gas ionization, and ions motion is performed using the particle-in-cell simulation. It is shown that the presence of ions leads to the virtual cathode neutralization, its displacement, and subsequent anew formation. The microwave generation has the form of a sequence of pulse packets, whose duration depends on the value of the retarding potential and the kind of gas.
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