Wave-beam interaction in coaxial relativistic backward wave oscillator

被引：5
作者：
机构：
[1] Northwest Institute of Nuclear Technology, Xi'an 710024
来源：
Teng, Y. (tengy05@mails.tsinghua.edu.cn) | 1600年 / Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China卷 / 24期
关键词：
Coaxial relativistic backward wave oscillator; Finite-difference time-domain method; High power microwave; Output efficiency; Wave-beam interaction;
D O I：
10.3788/HPLPB20122401.0175
中图分类号：
学科分类号：
摘要：
The physical model is established according to the characteristics of coaxial relativistic backward wave oscillator(CRBWO) to study the wave-beam interaction in CRBWO employing the finite-difference time-domain method. The research indicates that the output efficiency of the wave-beam interaction in CRBWO is sensitively dependent on the reflections on both ends of the wave-beam interaction region. And the distribution of the field in CRBWO is beneficial for the promotion of the output efficiency. In the case of electron beam of 500 keV and 4.0 kA, the calculated output efficiency more than 38% through optimizing and the starting time 7 ns agree with those obtained from previous numerical simulation and experiment results very well. The space charge effect can be considered as a small influence on the wave-beam interaction in CRBWO compared with that in hollow relativistic backward wave oscillator.
引用
收藏
页码：175 / 180
页数：5
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共 22 条
  • [1] Swegle J.A., Buford J.N., High-power microwaves at 25 years: the current state of development, 12th International Conference on High-power Particle Beams, pp. 149-152, (1998)
  • [2] Moreland L., Schamiloglu L., Lemke R.W., Et al., Efficiency enhancement of high power vacuum BWO's using nonuniform slow wave structures, IEEE Trans on Plasma Sci, 22, 4, pp. 554-565, (1994)
  • [3] Korovin S.D., Polevin S.D., Roitman A.M., Et al., Efficiency increase of relativistic BWO, Sov Tech Phys Lett, 18, 5, pp. 265-269, (1992)
  • [4] Bugaev S.P., Cherepenin V.A., Kanavets V.I., Et al., Relativistic multiwave Cerenkov generator, IEEE Trans on Plasma Sci, 18, 2, pp. 525-536, (1990)
  • [5] Liu G., Numerical simulation study of a type of coaxial slow wave structure relativistic HPM device, Proceedings of National 5th HPM Academic Conference, pp. 2-6, (2002)
  • [6] Xiao R.-Z., Liu G., Lin Y., Et al., Preliminary experimental research on relativistic high power microwave generator with coaxial slow wave structure, High Power Laser and Particle Beams, 18, 5, pp. 839-842, (2006)
  • [7] Teng Y., Xiao R., Song Z., Et al., High-efficiency coaxial relativistic backward wave oscillator, Rev Sci Instrum, 82, (2011)
  • [8] Xiao R.-Z., Liu G., Lin Y., Et al., Analytic theory of relativistic high power microwave generator with coaxial slow wave structure, High Power Laser and Particle Beams, 18, 2, pp. 241-244, (2006)
  • [9] Teng Y., Tang C., Liu G., Et al., Effects of the parameters of the slow wave structure on the linear growth rate of the coaxial RBWO, High Power Laser and Particle Beams, 21, 4, pp. 507-510, (2009)
  • [10] Liu G., Xiao R., Chen C., Et al., A Cerenkov generator with coaxial slow wave structure, J Appl Phys, 103, (2008)
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