中国物理B ›› 1994, Vol. 3 ›› Issue (1): 26-35.doi: 10.1088/1004-423X/3/1/003

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THE PROCESS OF SPACE CURRENT NEUTRALIZATION OF INTENSE RELATIVISTIC ELECTRON BEAM UNDER AN EXTERNALLY APPLIED MAGNETIC GUIDE FIELD

刘乃泉1, 谢羲1, 刘国治2   

  1. (1)Department of Modern Applied Physics, Tsinghua University, Beijing 100084, China; (2)Northwest Institute of Nuclear Technology, Xi'an 710024, China
  • 收稿日期:1992-09-07 出版日期:1994-01-20 发布日期:1994-01-20

THE PROCESS OF SPACE CURRENT NEUTRALIZATION OF INTENSE RELATIVISTIC ELECTRON BEAM UNDER AN EXTERNALLY APPLIED MAGNETIC GUIDE FIELD

LIU GUO-ZHI (刘国治)a, LIU NAI-QUAN (刘乃泉)b, XIE XI (谢羲)B   

  1. a Northwest Institute of Nuclear Technology, Xi'an 710024, China; b Department of Modern Applied Physics, Tsinghua University, Beijing 100084, China
  • Received:1992-09-07 Online:1994-01-20 Published:1994-01-20

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摘要： The process of space current neutralization of intense relativistic electron beam under an externally applied magnetic guide field is discussed in this paper. Ionization by electron avalanching and by beam electrons impact and recombination is included in the calculation of plasma density buildup, with plasma heating by return current and two- stream instability taken into account. A code to evaluate the process of space current neutralization was set up. The calculations demonstrate that the optimum gas pressure increases as peak beam current increases and it decreases as the risetime of beam pulse increases.

Abstract: The process of space current neutralization of intense relativistic electron beam under an externally applied magnetic guide field is discussed in this paper. Ionization by electron avalanching and by beam electrons impact and recombination is included in the calculation of plasma density buildup, with plasma heating by return current and two- stream instability taken into account. A code to evaluate the process of space current neutralization was set up. The calculations demonstrate that the optimum gas pressure increases as peak beam current increases and it decreases as the risetime of beam pulse increases.

中图分类号:  (Relativistic plasmas)

  • 52.27.Ny
41.75.Ht (Relativistic electron and positron beams) 52.35.Qz (Microinstabilities (ion-acoustic, two-stream, loss-cone, beam-plasma, drift, ion- or electron-cyclotron, etc.)) 52.25.Fi (Transport properties) 52.40.Mj (Particle beam interactions in plasmas)