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In this paper, in order to overcome the self-excited oscillation in the high-gain relativistic klystron amplifier, an X-band high-gain relativistic klystron amplifier (RKA) is designed driven by the relativistic beam with its current at a kA-level. The corresponding diode impedance is 800 Ω. Its output power reaches 284 MW at the frequency of 9.47GHz, and the gain and efficiency are 50.6 dB and of 37.4% respectively when the beam voltage is of 800 kV. And for the obtained GW-level RF power in low-impedance pulsed power sources, the power microwave combination technology of off-axis eight-tube high-gain RKA is used. In the three-dimensional model, the microwave output of this kind of RKA is almost constant when the device is at off-axis 54 mm. Simulation is based on the 4.5 T superconducting magnet which is 4.5 m long in the laboratory, and the eight-tube high-gain RKA is simulated using a magnet with the microwave output of 284 MW. Then an eight to one power combiner is designed using HFSS software, and the combiner with eight-tube high-gain RKAs is simulated by a three-dimensional model. Its output power is 1.84 GW, with a gain of 50.7 dB and efficiency of 28.8% respectively.
[1] Serlin V, Frideman M 1994 IEEE Trans. Plasma Sci. 22 692
[2] Benford J, Swegle J 1992 High Power Microwave (2nd Ed.) (New York: Taylor and Francis Group) pp35-82
[3] Rarber R J, Schamiloglu E (translated by Liu G Z, Zhou Z M) 2005 High Power Microwave Sources and Technologies (Beijing: Tsinghua University Press) pp57-63 (in Chinese) [巴卡R J, 谢米洛格鲁E著 (刘国治, 周传明译) 2005 高功率微波源与技术 (北京: 清华大学出版社) 第57–63页]
[4] Friedman M, Krall J 1988 J. Appl. Phys. 55 3353
[5] Sun P, Ding Y G, Zhao D 2007 High Power Laser Particle Beams 19 807 (in Chinese) [孙鹏,丁耀根,赵鼎 2007 强激光与粒子束 19 807]
[6] Liu S G 1989 Relativistic Electronics (Beijing: Science Press) pp101-102 (in Chinese) [刘盛纲 1989 相对论电子学 (北京:科学出版社) 第101–102页]
[7] Wu Y, Xie H Q, Xu Z 2014 Chin. Phys. C 38 017001
[8] Chen Y D, Wu Y, Xie H Q, Li Z H, Zhou Z G 2013 Acta Phys. Sin. 62 104104 (in Chinese) [陈永东, 吴洋, 谢鸿全, 李正红, 周自刚 2013 62 104104]
[9] Luo J G, Cui J, Zhu M, Guo W 2013 Chin. Phys. B 22 067803
[10] Xu X, Wei Y Y, Shen F, Huang M Z, Tang T, Duan Z Y, Gong Y B 2012 Chin. Phys. B 21 068402
[11] Cheng H, Xie H Q, Liu Y H, Li Z H, Wu Y 2014 Acta Phys. Sin. 63 018402 (in Chinese) [成会, 谢鸿全, 刘迎辉, 李正红, 吴洋 2014 63 018402]
[12] Sun P, Ding Y G, Zhao D 2007 High Power Laser Particle Beams 19 1865 (in Chinese) [孙鹏,丁耀根,赵鼎 2007 强激光与粒子束 19 1865]
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[1] Serlin V, Frideman M 1994 IEEE Trans. Plasma Sci. 22 692
[2] Benford J, Swegle J 1992 High Power Microwave (2nd Ed.) (New York: Taylor and Francis Group) pp35-82
[3] Rarber R J, Schamiloglu E (translated by Liu G Z, Zhou Z M) 2005 High Power Microwave Sources and Technologies (Beijing: Tsinghua University Press) pp57-63 (in Chinese) [巴卡R J, 谢米洛格鲁E著 (刘国治, 周传明译) 2005 高功率微波源与技术 (北京: 清华大学出版社) 第57–63页]
[4] Friedman M, Krall J 1988 J. Appl. Phys. 55 3353
[5] Sun P, Ding Y G, Zhao D 2007 High Power Laser Particle Beams 19 807 (in Chinese) [孙鹏,丁耀根,赵鼎 2007 强激光与粒子束 19 807]
[6] Liu S G 1989 Relativistic Electronics (Beijing: Science Press) pp101-102 (in Chinese) [刘盛纲 1989 相对论电子学 (北京:科学出版社) 第101–102页]
[7] Wu Y, Xie H Q, Xu Z 2014 Chin. Phys. C 38 017001
[8] Chen Y D, Wu Y, Xie H Q, Li Z H, Zhou Z G 2013 Acta Phys. Sin. 62 104104 (in Chinese) [陈永东, 吴洋, 谢鸿全, 李正红, 周自刚 2013 62 104104]
[9] Luo J G, Cui J, Zhu M, Guo W 2013 Chin. Phys. B 22 067803
[10] Xu X, Wei Y Y, Shen F, Huang M Z, Tang T, Duan Z Y, Gong Y B 2012 Chin. Phys. B 21 068402
[11] Cheng H, Xie H Q, Liu Y H, Li Z H, Wu Y 2014 Acta Phys. Sin. 63 018402 (in Chinese) [成会, 谢鸿全, 刘迎辉, 李正红, 吴洋 2014 63 018402]
[12] Sun P, Ding Y G, Zhao D 2007 High Power Laser Particle Beams 19 1865 (in Chinese) [孙鹏,丁耀根,赵鼎 2007 强激光与粒子束 19 1865]
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