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Through the particle-in-cell simulation and experimental investigation, the relation between the cathode ablation and the input voltage waveform of a magnetically insulated transmission line oscillator (MILO) is analyzed. And the key factor that results in the cathode ablation is found. The figures and process that the electron beam bombards back the cathode are obviously presented. By waveform adjustment of the low impedance accelerator, the reverse voltage of the input voltage to MILO is restrained, and the cathode ablation problem of the MILO driven by the low impedance accelerator is solved. Analysis results show that the electron beam which has been hauled from the cathode by the right direction voltage moves back, which the reverse voltage with adequate amplitude driven, and the beam bombards back the the cathode. The reverse current is formed and the cathode of the MILO device is ablated. Therefore, the reverse voltage immediately following the down slope of the input voltage is a key factor.
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Keywords:
- magnetically insulated transmission line oscillator /
- high power microwave /
- cathode ablation /
- reverse voltage
[1] Lemke R W, Clark M C 1987 IEEE Trans. Plasma Sci. 62 3436
[2] Clark M C, Marder B M, Bacon L D 1988 Appl. Phys. Lett. 52 78
[3] Chen D B, Fan Z K, Dong Z W, Xu Z, Zhou H J, Guo Y H, He H, Gong H T, An H S 2007 High Power Laser and Particle Beams 19 820 (in Chinese) [陈代兵, 范植开, 董志伟, 许州, 周海京, 郭焱华, 何琥, 龚海涛, 安海狮 2007 强激光与粒子束 19 820]
[4] Chen D B, Fan Z K, Zhou H J, Gao F Q, He H, Guo Y H, Wang D, Wang X D, Gong H T, An H S 2007 High Power Laser and Particle Beams 19 1352 (in Chinese) [陈代兵，范植开，周海京, 高凤琴, 何琥, 郭焱华, 王冬, 王晓东, 龚海涛, 安海狮 2007 强激光与粒子束 19 1352]
[5] Chen D B, Wang D, Meng F B, Fan Z K 2009 IEEE Trans. Plasma Sci. 37 23
[6] Chen D B, Wang D, Meng F B, Fan Z K, Qin F, Wen J 2009 IEEE Trans. Plasma Sci. 37 1916
[7] Chen D B, Wang D, Fan Z K, Meng F B, An H S, Gong H T, Qin F 2009 Acta Phys. Sin. 58 4548 (in Chinese) [陈代兵, 王冬, 范植开, 孟凡宝, 安海狮, 龚海涛, 秦奋 2009 58 4548]
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[9] Wang D, Chen D B, Fan Z K, Deng J K 2008 Acta Phys. Sin. 57 4875 (in Chinese) [王冬, 陈代兵, 范植开, 邓景康 2008 57 4875]
[10] Fan Y W, Zhou H, Zhong H H, Su T, Ji T, Yang H W, Luo L 2010 High Power Laser and Particle Beams 22 587 (in Chinese) [樊玉伟, 周恒, 钟辉煌, 舒挺, 季涛, 杨汉武, 罗玲 2010 强激光与粒子束 22 587]
[11] Gong Y B, Zhang Z, Wei Y Y, Meng F B, Fan Z K, Wang W X 2004 Acta Phys. Sin. 53 3990 (in Chinese) [宫玉彬, 张章, 魏彦玉, 孟凡宝, 范植开, 王文祥 2004 53 3990]
[12] Benford J, Swegle J A, Schamiloglu E 2007 High Power Microwave (2nd Ed.) Taylor & Francis Group
[13] Zhou C M, Liu G Z, Liu Y G 2007 High Power Microwave Source (Beijing: Atomic Energy Press) (in Chinese) [周传明, 刘国治, 刘永贵 2007 高功率微波源 (北京: 原子能出版社)]
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[1] Lemke R W, Clark M C 1987 IEEE Trans. Plasma Sci. 62 3436
[2] Clark M C, Marder B M, Bacon L D 1988 Appl. Phys. Lett. 52 78
[3] Chen D B, Fan Z K, Dong Z W, Xu Z, Zhou H J, Guo Y H, He H, Gong H T, An H S 2007 High Power Laser and Particle Beams 19 820 (in Chinese) [陈代兵, 范植开, 董志伟, 许州, 周海京, 郭焱华, 何琥, 龚海涛, 安海狮 2007 强激光与粒子束 19 820]
[4] Chen D B, Fan Z K, Zhou H J, Gao F Q, He H, Guo Y H, Wang D, Wang X D, Gong H T, An H S 2007 High Power Laser and Particle Beams 19 1352 (in Chinese) [陈代兵，范植开，周海京, 高凤琴, 何琥, 郭焱华, 王冬, 王晓东, 龚海涛, 安海狮 2007 强激光与粒子束 19 1352]
[5] Chen D B, Wang D, Meng F B, Fan Z K 2009 IEEE Trans. Plasma Sci. 37 23
[6] Chen D B, Wang D, Meng F B, Fan Z K, Qin F, Wen J 2009 IEEE Trans. Plasma Sci. 37 1916
[7] Chen D B, Wang D, Fan Z K, Meng F B, An H S, Gong H T, Qin F 2009 Acta Phys. Sin. 58 4548 (in Chinese) [陈代兵, 王冬, 范植开, 孟凡宝, 安海狮, 龚海涛, 秦奋 2009 58 4548]
[8] Chen D B, Wang D, Qin F, Wen J, Jin X, An H S, Zhang X K 2012 Acta Phys. Sin. 61 012901 (in Chinese) [陈代兵, 王冬, 秦奋, 文杰, 金晓, 安海狮, 张新凯 2012 61 012901]
[9] Wang D, Chen D B, Fan Z K, Deng J K 2008 Acta Phys. Sin. 57 4875 (in Chinese) [王冬, 陈代兵, 范植开, 邓景康 2008 57 4875]
[10] Fan Y W, Zhou H, Zhong H H, Su T, Ji T, Yang H W, Luo L 2010 High Power Laser and Particle Beams 22 587 (in Chinese) [樊玉伟, 周恒, 钟辉煌, 舒挺, 季涛, 杨汉武, 罗玲 2010 强激光与粒子束 22 587]
[11] Gong Y B, Zhang Z, Wei Y Y, Meng F B, Fan Z K, Wang W X 2004 Acta Phys. Sin. 53 3990 (in Chinese) [宫玉彬, 张章, 魏彦玉, 孟凡宝, 范植开, 王文祥 2004 53 3990]
[12] Benford J, Swegle J A, Schamiloglu E 2007 High Power Microwave (2nd Ed.) Taylor & Francis Group
[13] Zhou C M, Liu G Z, Liu Y G 2007 High Power Microwave Source (Beijing: Atomic Energy Press) (in Chinese) [周传明, 刘国治, 刘永贵 2007 高功率微波源 (北京: 原子能出版社)]
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