中国物理B ›› 2013, Vol. 22 ›› Issue (6): 67803-067803.doi: 10.1088/1674-1056/22/6/067803

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Mode stability analysis in the beam-wave interaction process for a three-gap Hughes-type coupled cavity chain

罗积润a, 崔健b, 朱敏a, 郭炜a   

  1. a Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
    b College of Electronic Information and Control Engineering, North China University of Technology, Beijing 100124, China
  • 收稿日期:2012-10-29 修回日期:2012-11-24 出版日期:2013-05-01 发布日期:2013-05-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11205162).

Mode stability analysis in the beam-wave interaction process for a three-gap Hughes-type coupled cavity chain

Luo Ji-Run (罗积润)a, Cui Jian (崔健)b, Zhu Min (朱敏)a, Guo Wei (郭炜)a   

  1. a Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
    b College of Electronic Information and Control Engineering, North China University of Technology, Beijing 100124, China
  • Received:2012-10-29 Revised:2012-11-24 Online:2013-05-01 Published:2013-05-01
  • Contact: Luo Ji-Run E-mail:luojirun@mail.ie.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11205162).

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摘要： Based on space-charge wave theory, the formulae of the beam-wave coupling coefficient and the beam-loaded conductance are given for the beam-wave interaction in an N-gap Hughes-type coupled cavity chain. The ratio of the nonbeam-loaded quality factor of the coupled cavity chain to the beam quality factor is used to determine the stability of the beam-wave interaction. As an example, the stabilities of the beam-wave interaction in a three-gap Hughes-type coupled cavity chain are discussed with the formulae and the CST code for the operations of the 2π, π, and π/2 modes, respectively. The results show that stable operation of the 2π, π, and π/2 modes may all be realized in an extended-interaction klystron with the three-gap Hughes-type coupled cavity chain.

关键词: three-gap Hughes-type coupled cavity chain, coupling coefficient, beam-loaded conductance, beam quality factor, stability

Abstract: Based on space-charge wave theory, the formulae of the beam-wave coupling coefficient and the beam-loaded conductance are given for the beam-wave interaction in an N-gap Hughes-type coupled cavity chain. The ratio of the nonbeam-loaded quality factor of the coupled cavity chain to the beam quality factor is used to determine the stability of the beam-wave interaction. As an example, the stabilities of the beam-wave interaction in a three-gap Hughes-type coupled cavity chain are discussed with the formulae and the CST code for the operations of the 2π, π, and π/2 modes, respectively. The results show that stable operation of the 2π, π, and π/2 modes may all be realized in an extended-interaction klystron with the three-gap Hughes-type coupled cavity chain.

Key words: three-gap Hughes-type coupled cavity chain, coupling coefficient, beam-loaded conductance, beam quality factor, stability

中图分类号:  (Microwave and radio-frequency interactions)

  • 78.70.Gq
84.40.-x (Radiowave and microwave (including millimeter wave) technology) 84.40.Fe (Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.))