中国物理B ›› 2003, Vol. 12 ›› Issue (11): 1235-1240.doi: 10.1088/1009-1963/12/11/309

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Three-dimensional nonlinear theory of travelling wave tubes and simulation

李斌, 杨中海   

  1. School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
  • 收稿日期:2002-06-28 修回日期:2003-06-06 出版日期:2005-03-16 发布日期:2005-03-16
  • 基金资助:
    Project supported by the National High Technology Development Program of China (Grant No 863-410-7).

Three-dimensional nonlinear theory of travelling wave tubes and simulation

Li Bin (李斌), Yang Zhong-Hai (杨中海)   

  1. School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2002-06-28 Revised:2003-06-06 Online:2005-03-16 Published:2005-03-16
  • Supported by:
    Project supported by the National High Technology Development Program of China (Grant No 863-410-7).

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摘要： A three-dimensional (3D) nonlinear theory of travelling wave tubes (TWTs) is developed, which includes a fundamental radio frequency (RF) and harmonics. When the instantaneous bandwidth exceeds an octave, the harmonic is generated and the mutual coupling between the harmonic and the fundamental RF can be observed in TWTs due to nonlinear interaction between the electron beam and the RF. At low frequencies the harmonic has an obvious effect. Based upon Tien's disc model, a plastic 3D super-particle model is proposed to improve the nonlinear analysis of TWTs. Numerical results employing a periodic magnetic focusing field are presented.

Abstract: A three-dimensional (3D) nonlinear theory of travelling wave tubes (TWTs) is developed, which includes a fundamental radio frequency (RF) and harmonics. When the instantaneous bandwidth exceeds an octave, the harmonic is generated and the mutual coupling between the harmonic and the fundamental RF can be observed in TWTs due to nonlinear interaction between the electron beam and the RF. At low frequencies the harmonic has an obvious effect. Based upon Tien's disc model, a plastic 3D super-particle model is proposed to improve the nonlinear analysis of TWTs. Numerical results employing a periodic magnetic focusing field are presented.

Key words: TWTs, nonlinear theory, harmonic, simulation

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

  • 84.40.Fe
42.65.-k (Nonlinear optics) 41.75.Fr (Electron and positron beams) 02.60.Cb (Numerical simulation; solution of equations)