Enhancements of Cherenkov Radiation by Two Electron Beams

被引：3
作者：
Liu, Wenxin [1 ]
Liu, Pu-Kun [1 ]
Yong, Wang [1 ]
Yang, Ziqiang [2 ]
机构：
[1] Chinese Acad Sci, Inst Elect, Beijing 100190, Peoples R China
[2] Univ Electron & Sci China, Sch Phys Elect, Chengdu 610054, Peoples R China
来源：
IEEE TRANSACTIONS ON PLASMA SCIENCE | 2012年 / 40卷 / 03期
基金：
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词：
Cherenkov radiation; dispersion equation; particle-in-cell simulation; two electron beams (TEBs);
D O I：
10.1109/TPS.2011.2181423
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
An approach to the enhancement of Cherenkov radiation source driven by two electron beams (TEBs) is presented in this paper. The Cherenkov radiation source is composed of a cylindrical grating, and TEBs with a velocity separation are concentric and separated. By a field matched method, the dispersion equation is derived with a linearized fluid theory and solved by numerical calculation. The numerical results show that a considerable enhancement of growth rate is realized at an optimized voltage ratio due to two stream instability. Moreover, with a help of 2-D particle-in-cell simulations, the improvement of output power induced by the two stream instability is demonstrated, and the decreased of output power is observed as the increased distance of two electron beams.
引用
收藏
页码：835 / 842
页数：8
相关论文
共 25 条
[1]  
[Anonymous], 1987, High Power Microwave Devices
[2]  
[Anonymous], 1958, CERENKOV RAD ITS APP
[3]  
[Anonymous], 1984, Electrodynamics of Continuous Media
[4]   RELATIVISTIC PLASMA MICROWAVE ELECTRONICS - STUDIES OF HIGH-POWER PLASMA-FILLED BACKWARD-WAVE OSCILLATORS [J].
CARMEL, Y ;
LOU, WR ;
ANTONSEN, TM ;
RODGERS, J ;
LEVUSH, B ;
DESTLER, WW ;
GRANATSTEIN, VL .
PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1992, 4 (07) :2286-2292
[5]  
Di Jun, 2005, Journal of University of Electronic Science and Technology of China, V34, P485
[6]  
FAINBERG YB, 1959, SOV PHYS-TECH PHYS, V4, P487
[7]   Multiple-beam free-electron lasers [J].
Freund, HP ;
Douglas, D ;
O'Shea, PG .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2003, 507 (1-2) :373-377
[8]  
Gorbatenko M. F., 1964, SOV PHYS-TECH PHYS, V8, P798
[9]  
Haddad G. I., 1963, IEEE T ELECTRON DEV, VED-10, P389
[10]  
Igant D. W., 1970, PHYS REV A, V1, P872
123