中国物理B ›› 2006, Vol. 15 ›› Issue (9): 2042-2045.doi: 10.1088/1009-1963/15/9/025

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Analysis of the axial electric field in a plasma-loaded-helix travelling wave tube

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 621002, China
  • 收稿日期:2006-03-04 修回日期:2006-03-27 出版日期:2006-09-20 发布日期:2006-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10347009) and the Science Foundation of Education Bureau of Sichuan Province, China (Grant No 2003B019).

Analysis of the axial electric field in a plasma-loaded-helix travelling wave tube

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 621002, China; b Institute of Electronics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2006-03-04 Revised:2006-03-27 Online:2006-09-20 Published:2006-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10347009) and the Science Foundation of Education Bureau of Sichuan Province, China (Grant No 2003B019).

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摘要： A helix type slow wave structure filled with plasma is immersed in a strong longitudinal magnetic field. Taking into account the effect of the plasma and the dielectric, the system is separated radially into three regions. By means of the sheath model and Maxwell equation, the distribution of the electromagnetic field is established. Using the boundary conditions of each region, the dispersion relation of the slow wave structure is derived. The trend of change for the radial profile of the axial electric field is analysed respectively in different plasma densities, plasma column radius and dielectric constant by numerical computation. Some useful results are obtained on the basis of the discussion.

关键词: helix travelling wave tube, plasma, axial electric field

Abstract: A helix type slow wave structure filled with plasma is immersed in a strong longitudinal magnetic field. Taking into account the effect of the plasma and the dielectric, the system is separated radially into three regions. By means of the sheath model and Maxwell equation, the distribution of the electromagnetic field is established. Using the boundary conditions of each region, the dispersion relation of the slow wave structure is derived. The trend of change for the radial profile of the axial electric field is analysed respectively in different plasma densities, plasma column radius and dielectric constant by numerical computation. Some useful results are obtained on the basis of the discussion.

Key words: helix travelling wave tube, plasma, axial electric field

中图分类号:  (Acoustical properties of liquids)

  • 62.60.+v
43.35.Bf (Ultrasonic velocity, dispersion, scattering, diffraction, and Attenuation in liquids, liquid crystals, suspensions, and emulsions) 61.20.-p (Structure of liquids) 65.20.-w (Thermal properties of liquids)