Volume 26 Issue 02
Jan.  2014
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Article Navigation >  High Power Laser and Particle Beams  > 2014  >  26(02): 023002
Liu Jie, Ding Yongkun, Tian Jinshou, et al. Modular remote-controllable anisotropic focusing streak camera[J]. High Power Laser and Particle Beams, 2012, 24: 2405-2410. doi: 10.3788/HPLPB20122410.2405
Citation: Lei Chaojun, Yu Sheng, Li Hongfu, et al. Design and numerical simulation of a 94 GHz gyrotron with gradually tapered cavity[J]. High Power Laser and Particle Beams, 2014, 26: 023002. doi: 10.3788/HPLPB201426.023002
shu

Design and numerical simulation of a 94 GHz gyrotron with gradually tapered cavity

doi: 10.3788/HPLPB201426.023002
  • 1.

    The Chinese People’s Armed Police Force Academy,Langfang 065000,China;

  • 2.

    Terahertz Science and Technology Research Center,University of Electronic Science and Technology of China,Chengdu 610054,China

  • Received Date: 2013-06-04
  • Rev Recd Date: 2013-09-13
  • Publish Date: 2014-02-15
    Abstract
  • Through analysing the coupling coefficient of the generalised telegraphists equations, an optimized 94 GHz gyrotron with gradually tapered cavity is designed. An output power of about 120 kW,corresponding to 41% efficiency, and an oscillation frequency of 94.099 GHz are achieved with a 50 kV, 6 A helical electron beam with a pitch angle of 1.4 at a guiding magnetic field of 3.548 5 T. Compared with the line-joint cavity, the purity of the operating mode is enhanced above 27 dB and the efficiency increases about 7% in the gyrotron with gradually tapered cavity. The efficiency of the beam-wave interaction calculated by the code based on the self-consistent nonlinear theory is in well accord with that simulated by PIC.
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