A study on the high-order mode oscillation in a four-cavity intense relativistic klystron amplifier

作者：Liu, Ying-Hui^*; Niu, Xin-Jian; Jia, Nan; Li, Zheng-Hong; Wang, Hui; Cheng, Hui; Yang, Xiao-Chuan; Duan, Yaoyong

来源：Physics of Plasmas, 2016, 23(7): 072110.

DOI：10.1063/1.4953449

The high-order mode oscillation is studied in designing a four-cavity intense relativistic klystron amplifier. The reason for the oscillation caused by high-order modes and a method to suppress these kinds of spurious modes are found through theoretical analyses and the study on the influence of major parameters of a high frequency structure (such as the oscillation frequency of cavities, the cavity Q value, the length of drift tube section, and the characteristic impedance). Based on much simulation, a four-cavity intense relativistic klystron amplifier with a superior performance has been designed, built, and tested. An output power of 2.22GW corresponding to 27.4% efficiency and 61 dB gain has been obtained. Moreover, the high-order mode oscillation is suppressed effectively, and an output power of 1.95GW corresponding to 26% efficiency and 62 dB gain has been obtained in our laboratory. Published by AIP Publishing.

• 单位
  电子科技大学; 中国工程物理研究院; 中国空气动力研究与发展中心; 中国人民武装警察部队学院