中国物理B ›› 2004, Vol. 13 ›› Issue (3): 373-378.doi: 10.1088/1009-1963/13/3/020

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Energy loss of a fast-electron beam due to the excitation of collective oscillation in hot plasma

马瑾怡1, 邱锡钧1, 朱志远2   

  1. (1)Department of Physics, Shanghai University, Shanghai 200436, China; (2)Shanghai Institution of Nuclear Research, Shanghai 201800, China
  • 收稿日期:2003-03-07 修回日期:2003-08-21 出版日期:2005-07-06 发布日期:2005-07-06
  • 基金资助:
    Project supported by the Knowledge Innovation Project of Chinese Academy of Sciences (Grant No. KJCX2-SW-N02).

Energy loss of a fast-electron beam due to the excitation of collective oscillation in hot plasma

Ma Jin-Yi (马瑾怡)a, Qiu Xi-Jun (邱锡钧)a, Zhu Zhi-Yuan (朱志远)b   

  1. a Department of Physics, Shanghai University, Shanghai 200436, China; b Shanghai Institution of Nuclear Research, Shanghai 201800, China
  • Received:2003-03-07 Revised:2003-08-21 Online:2005-07-06 Published:2005-07-06
  • Supported by:
    Project supported by the Knowledge Innovation Project of Chinese Academy of Sciences (Grant No. KJCX2-SW-N02).

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摘要： Energy loss due to a fast-electron beam interacting with the hot plasma at a high density is analysed theoretically. By splitting the particle density fluctuations into the individual part due to the random thermal motion of the individual electrons and the collective part due to plasma－wave excitation, we are concerned with the collective interaction of the relativistic plasma electrons resulting from the Coulomb interactions. Consequently, we derive the frequency of the hot plasma and the "Debye length" with the modification of the relativistic effect. And finally we calculate the energy loss of a fast-electron beam due to the excitation of collective oscillation in the hot plasma.

Abstract: Energy loss due to a fast-electron beam interacting with the hot plasma at a high density is analysed theoretically. By splitting the particle density fluctuations into the individual part due to the random thermal motion of the individual electrons and the collective part due to plasma－wave excitation, we are concerned with the collective interaction of the relativistic plasma electrons resulting from the Coulomb interactions. Consequently, we derive the frequency of the hot plasma and the "Debye length" with the modification of the relativistic effect. And finally we calculate the energy loss of a fast-electron beam due to the excitation of collective oscillation in the hot plasma.

Key words: fast-electron beam, excitation of collective oscillation, hot plasma

中图分类号:  (Particle beam interactions in plasmas)

  • 52.40.Mj
52.35.-g (Waves, oscillations, and instabilities in plasmas and intense beams) 52.27.Ny (Relativistic plasmas)