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Investigation on an S-band relativistic klystron oscillator

Huang Hua Gan Yan-Qing Lei Lu-Rong Jin Xiao Ju Bing-Quan Xiang Fei Feng Di-Chao Liu Zhong

Investigation on an S-band relativistic klystron oscillator

Huang Hua, Gan Yan-Qing, Lei Lu-Rong, Jin Xiao, Ju Bing-Quan, Xiang Fei, Feng Di-Chao, Liu Zhong
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  • Abstract views:  3752
  • PDF Downloads:  870
  • Cited By: 0
Publishing process
  • Received Date:  29 April 2007
  • Accepted Date:  06 July 2007
  • Published Online:  20 March 2008

Investigation on an S-band relativistic klystron oscillator

  • 1. 中国工程物理研究院应用电子学研究所,绵阳 621900

Abstract: The physics of modulation and rf extraction of an S-band relativistic klystron oscillator is studied in this paper via experiment, theory, and simulation. It is found that the intense relativistic electron beams (IREBs) can be intensely current-modulated when the IREBs drift through three pillboxes with high coupling. After bunching in the downstream the modulated IREBs can excite high-power microwave in the triaxial cavity. These properties, which have short oscillating time, compact geometry and high beam-wave conversion efficiency, were encouraging. Using a 1 MV, 13 kA, 40 ns electron beam and a 0.9 kGs leading magnetic field, 3.5 GW radiated power was extracted in 20 ns FWHM pulses at 2.86 GHz. The efficiency was 27%, and the instantaneous bandwidth was 2%. The radiated power was 3.4 GW when the repetition rate IREBs was 20 Hz. The experimental results agree well with the simulations.

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