计算物理 ›› 1996, Vol. 13 ›› Issue (1): 38-42.

• 论文 • 上一篇    下一篇

虚阴极产生微波的一些基本特性

王敏, 李京   

  1. 北京应用物理与计算数学研究所, 北京 100088
  • 收稿日期:1994-07-14 修回日期:1995-10-16 出版日期:1996-03-25 发布日期:1996-03-25
  • 基金资助:
    中国工程物理研究院科学技术基金资助

SOME BASIC PROPERTIEW OF VIRCATOR GENERETING MICROWAVE

Wang Min, Li Jing   

  1. Institute of Applied Physics and Computational Mathematics, Beijing 100088
  • Received:1994-07-14 Revised:1995-10-16 Online:1996-03-25 Published:1996-03-25

摘要: 用Vlasov-Poisson方程对相对论电子束在单板、双板间的传播过程进行了数值模拟,给出了单板模型空间电荷积累最大的位置,不同位置上的电流J、电子数密度n、电场E的振荡频率随入射电子数密度n0、入射速度v0的变化关系,双板模型空间电荷积累最大的位置,JnE的振荡频率随入射流J0及两板间距离的变化关系。虚阴极位置的数值结果与稳态理论给出的结果相近,它的振荡频率符合经验公式(1~√)ωpeb。单板时入射电子数密度按速度服从高斯分布,能散△En/En < 10%时的数值结果给出与单能情况基本相同的结论。

关键词: 相对论电子束, 虚阴极, 振荡

Abstract: The Vlasov-Poisson equations are used to simulate the propagation processes of relativistic electron beam (REB) in one plate or two plates.The position of cumulative maximum space charge,the oscillating frequency,of current J,elrctron number density n and electric field E in different positions versus injecting electron number density n0 and injecting electron velocity v0 in one plate model,and the inject-ing current J0 and the distance between the two plates in two plates model are investigated.Numerical results of virtual cathode position are closed to the results given by stable theory.Its oscillating frequency is in agreement with the empiric expresion (1~√)ωpeb.Numerical simulation result for injecting elec-tron beam density having Guass distribution for volecity,spread of energy ΔEn/En < 10% appears to be in largely conformity with the conclusion of monoenergy case in one plate model.

Key words: relativistic electron beam, vircator, oscillation

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