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This paper described a high-order mode oscillation phenomenon, in the simulation of four-cavity intense relativistic klystron amplifier(IRKA). And we have analyzed the cause of this kind of oscillation, and explored the suppression methods for the whole tube. Two-dimensional and three-dimensional electromagnetism simulation software are used to study the influence of parameter’s changes (such as the oscillation frequency of cavities, the cavity Q value, the length of drift tube, and the characteristic impedance) on the high-order mode oscillation. The effectiveness of the high-order mode oscillation suppression methods is verified by simulation. Then, by optimizing the structure of IRKA, we have achieved an output microwave with a power of 2.13 GW, a gain of 60 dB and an efficiency of 26% in simulation, and the high-mode oscillation is avoided effectively. Finally, an output microwave with a power of 1.9 GW, a gain of 61 dB, and an efficiency of 24% is gained in the experiment.
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Keywords:
- four-cavity intense relativistic klystron /
- electromagnectism /
- high-order mode oscillation /
- avoided
[1] Benfoed J, Swegle J High Power Microwave. (New York: Taylor and Francis Group) (in America)
[2] Ding Y G 2008 Theory and Computer Simulation of High Power Klystron(Beijing: National Defense Industry Press) p2 (in Chinese) [丁耀根 2008 大功率速调管的理论与设计模拟 (北京: 国防科技工业出版社)第2页]
[3] Luo J R, Cui J, Zhu M 2013 Chin. Phys. B 22 067803
[4] Becker U, Krieterstein B, Weiland T, Dohlus M, Ko K 1996 Proceeding of European Particle Accelerator Conference Baroelona, 1996 p1274. 会议文集 地理时间
[5] Ding Y G 1992 Journal of Electronics 14 409 (in Chinese) [丁耀根 1992 电子科学学刊 14 409]
[6] Zhang R, Wang Y 2006 High Power Laser Particle Beams 18 1129 (in Chinese) [张瑞, 王勇 2006 强激光与粒子束 18 1129]
[7] Fan Z K 1999 High Power Laser Particle Beams 11 633 (in Chinese) [范植开 1999 强激光与粒子束 11 633]
[8] Dong Y H, Ding Y G, Xiao L 2005 Acta Phys. Sin. 54 5629 (in Chinese) [董玉和, 丁耀根, 肖刘 2005 物理学报 54 5629]
[9] Rowe J E 1965 Nonlinear electron-wave interaction phenomena (London: Academic Press) p324 (in England)
[10] Slater J C 1946 Rev. Mod. Phys. 18 441
[11] Nusinovich G, Read M, Song L Q 2004 Phys. Plasmas 11 4893
[12] Xie J L, Zhao Y X 1996 Bunching theory of klystron (Beijing: Science Press) p63 (in Chinese) [谢家麟, 赵永翔 1996速调管群聚理论(北京: 科学出版社)第63页]
[13] Li Z H, Meng F B, Chang A B, Huang H, Ma Q S 2005 Acta Phys. Sin. 54 3578 (in Chinese) [李正红, 孟凡宝, 常安碧, 黄华, 马乔生 2005 物理学报 54 3578]
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[1] Benfoed J, Swegle J High Power Microwave. (New York: Taylor and Francis Group) (in America)
[2] Ding Y G 2008 Theory and Computer Simulation of High Power Klystron(Beijing: National Defense Industry Press) p2 (in Chinese) [丁耀根 2008 大功率速调管的理论与设计模拟 (北京: 国防科技工业出版社)第2页]
[3] Luo J R, Cui J, Zhu M 2013 Chin. Phys. B 22 067803
[4] Becker U, Krieterstein B, Weiland T, Dohlus M, Ko K 1996 Proceeding of European Particle Accelerator Conference Baroelona, 1996 p1274. 会议文集 地理时间
[5] Ding Y G 1992 Journal of Electronics 14 409 (in Chinese) [丁耀根 1992 电子科学学刊 14 409]
[6] Zhang R, Wang Y 2006 High Power Laser Particle Beams 18 1129 (in Chinese) [张瑞, 王勇 2006 强激光与粒子束 18 1129]
[7] Fan Z K 1999 High Power Laser Particle Beams 11 633 (in Chinese) [范植开 1999 强激光与粒子束 11 633]
[8] Dong Y H, Ding Y G, Xiao L 2005 Acta Phys. Sin. 54 5629 (in Chinese) [董玉和, 丁耀根, 肖刘 2005 物理学报 54 5629]
[9] Rowe J E 1965 Nonlinear electron-wave interaction phenomena (London: Academic Press) p324 (in England)
[10] Slater J C 1946 Rev. Mod. Phys. 18 441
[11] Nusinovich G, Read M, Song L Q 2004 Phys. Plasmas 11 4893
[12] Xie J L, Zhao Y X 1996 Bunching theory of klystron (Beijing: Science Press) p63 (in Chinese) [谢家麟, 赵永翔 1996速调管群聚理论(北京: 科学出版社)第63页]
[13] Li Z H, Meng F B, Chang A B, Huang H, Ma Q S 2005 Acta Phys. Sin. 54 3578 (in Chinese) [李正红, 孟凡宝, 常安碧, 黄华, 马乔生 2005 物理学报 54 3578]
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