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Study on Nonlinear Theory and Code of Beam-Wave Interaction for Gyroklystron

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Abstract

A nonlinear self-consistent theory of beam-wave interaction for gyroklystron with multiple cavities is analyzed in this paper. The electron motion equations and transient electromagnetic field equations in a complex form are deduced in detail. A calculation code including a time-dependent description of the electromagnetic fields and a self-consistent analysis of the electrons is designed and the corresponding software implementation is achieved using Fortran language. An example is presented for the operation of the code, namely a four-cavity, Ka-band gyroklystron operating in the TE011 mode at the fundamental of the cyclotron frequency. The numerical results show that a maximal saturated peak output power of 330 kW, corresponding to 39% efficiency and a saturated 3-dB bandwidth of 325 MHz is achieved with a 72.8 kv, 11.8 A electron beam at a focused magnetic field of 13 kG and a beam velocity ratio of 1.63 when the speed spread is 5%. By comparison, the numerical results agree with the experimental results.

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Authors and Affiliations

  1. Research Institute of High Energy Electronics University of Electronic Science and Technology of China, Chengdu, 610054, China

    Guo Jianhua, Yu Sheng, Li Xiang & Li Hongfu

Authors
  1. Guo Jianhua
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  2. Yu Sheng
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  3. Li Xiang
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  4. Li Hongfu
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Correspondence to Guo Jianhua.

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Foundation item: This project is supported by the Chinese hi-tech development

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Jianhua, G., Sheng, Y., Xiang, L. et al. Study on Nonlinear Theory and Code of Beam-Wave Interaction for Gyroklystron. J Infrared Milli Terahz Waves 32, 1382–1393 (2011). https://doi.org/10.1007/s10762-011-9831-4

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  • DOI: https://doi.org/10.1007/s10762-011-9831-4

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