[1] [1] Zhu Danni. Simulation design of an Xb highimpedance relativistic klystron amplifier[D]. Changsha: National University of Defense Technology, 2013: 12

[2] [2] Barker R J, Schamiloglu E. Highpower microwave sources technologies[M]. Translation Group f 《High Power Microwave Sources Technologies》, trans. Beijing: Tsinghua University Press, 2005

[3] Huang Hua, Gan Yanqing, Lei Lurong, . Investigation on an S-band relativistic klystron oscillator[J]. Acta Physica Sinica, 57, 1765-1770(2008).

[4] [4] Li Shifeng, Huang Hua, Duan Zhaoyun, et al. Simulation of Kab gigawatt coaxial extended interaction relativistic klystron amplifier[C]20th CVE of Chinese Institute of Electronics. 2016: 15

[5] Liu Zhenbang, Huang Hua, Jin Xiao, . Design of X-band high-power high-gain multiple-beam relativistic klystron amplifier[J]. High Power Laser and Particle Beams, 32, 103004(2020).

[6] [6] Sprehn D, Caryotakis G, Eppley K, et al. PPM focused Xb klystron development at the Stanfd Linear Accelerat Center[C]Pulsed RF Sources f Linear Colliders. 1996: 29.

[7] Wei Yuanzhang, Li Shifeng, Wang Zhanliang, . Periodic permanent focusing magnet of relativistic klystron[J]. High Power Laser and Particle Beams, 30, 063007(2018).

[9] [9] Malykhin A V, Nevsky P V, Pasmannik V I, et al. Highpower multibeam klystron with reversive magic focusing system[C]Proceedings International University Conference ''Electronics Radiophysics of UltraHigh Frequencies''. 1999: 5659.

[10] [10] Akimov P I, Balabanov A K, Chudin V G, et al. Cb multibeam klystron with reversal focusing system on permanent mags f electron accelerats[C]Proceedings of the 10th International Vacuum Electron Sources Conference (IVESC). 2014: 12.

[11] [11] Komarov D A, Yakushkin E P, Paramonov Y N, et al. Development of a Cb high power amplifier Klystron f linear electron accelerats[C]Proceedings of the 18th International Vacuum Electronics Conference. 2017: 12.

[12] [12] Lin Jiawen. Research on permanent magic packaging technology of Sb relativistic klystron[D]. Chengdu: University of Electronic Science Technology of China, 2021: 3264

[13] [13] Electronic Tube Design Hbook Editial Committee. Microwave electron tube magic circuit design hbook[M]. Beijing: National Defense Industry Press, 1984

[14] [14] Ding Yaogen. They computer simulation of highpower klystron[M]. Beijing: National Defense Industry Press, 2008

[15] [15] Ding Yaogen. Design, manufacture application of high power klystron[M]. Beijing: National Defense Industry Press, 2010

[16] Ding Yaogen. Study on electron optics system of multi-beam klystron[J]. Journal of Electronics, 22, 485-491(2000).

[17] [17] Lin Bingchu, Wang Jianru. Electron optics[M]. Beijing: Tsinghua University Press, 2002

[18] Gu Ruonan, Li Xiangqiang, Kong Long, . Analysis of transmission characteristics of the intense relativistic electron beam under PPM focusing system[J]. Information Technology, 14-17(2017).