中国物理B ›› 2007, Vol. 16 ›› Issue (3): 766-771.doi: 10.1088/1009-1963/16/3/034

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Theoretical analysis of a relativistic travelling wave tube filled with plasma

刘濮鲲1, 谢鸿全2   

  1. (1)Institute of Electronics, Chinese Academy of Sciences,Beijing 100080, China; (2)School of Science, Southwest University of Science and Technology, Mianyang 621010, China
  • 收稿日期:2005-11-30 修回日期:2006-10-11 出版日期:2007-03-20 发布日期:2007-03-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10347009) and Science Foundation of Education Bureau of Sichuan Province, China (Grand No~2003B019).

Theoretical analysis of a relativistic travelling wave tube filled with plasma

Xie Hong-Quan(谢鸿全)a)† and Liu Pu-Kun(刘濮鲲)b)   

  1. a School of Science, Southwest University of Science and Technology, Mianyang 621010, China; b Institute of Electronics, Chinese Academy of Sciences,Beijing 100080, China
  • Received:2005-11-30 Revised:2006-10-11 Online:2007-03-20 Published:2007-03-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10347009) and Science Foundation of Education Bureau of Sichuan Province, China (Grand No~2003B019).

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摘要： A cold and uniform plasma-filled travelling wave tube with sinusoidally corrugated slow wave structure is driven by a finite thick annular intense relativistic electron beam with the entire system immersed in a strong longitudinal magnetic field. By means of the linear field theory, the dispersion relation for the relativistic travelling wave tube (RTWT) is derived. By numerical computation, the dispersion characteristics of the RTWT are analysed in different cases of various geometric parameters of the slow wave structure and plasma densities. Also the gain versus frequency for three different plasma densities and the peak gain of the tube versus plasma density are analysed. Some useful results are obtained on the basis of the discussion.

关键词: RTWT, plasma, annular electron beam, dispersion characteristic, gain

Abstract: A cold and uniform plasma-filled travelling wave tube with sinusoidally corrugated slow wave structure is driven by a finite thick annular intense relativistic electron beam with the entire system immersed in a strong longitudinal magnetic field. By means of the linear field theory, the dispersion relation for the relativistic travelling wave tube (RTWT) is derived. By numerical computation, the dispersion characteristics of the RTWT are analysed in different cases of various geometric parameters of the slow wave structure and plasma densities. Also the gain versus frequency for three different plasma densities and the peak gain of the tube versus plasma density are analysed. Some useful results are obtained on the basis of the discussion.

Key words: RTWT, plasma, annular electron beam, dispersion characteristic, gain

中图分类号:  (Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.))

  • 84.40.Fe
52.40.Db (Electromagnetic (nonlaser) radiation interactions with plasma)