Radiation Enhancement of a Relativistic Backward-Wave Oscillator Driven by Two Annular Electron Beams

被引：5

作者：

Liu, Wenxin ^{[1
]}

Yang, Ziqiang ^{[2
]}

Wang, Yong ^{[1
]}

Liu, Pukun ^{[3
]}

Zhao, Chao ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Elect, High Power Source & Technol, Beijing 100190, Peoples R China

[2] Univ Electron & Sci China, Sch Phys Elect, Chengdu 610054, Peoples R China

[3] Peking Univ, Sch Elect Engn & Comp Sci, Beijing 100871, Peoples R China

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2014年 / 42卷 / 01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); 中国科学院基金;

关键词：

Radiation enhancement; relativistic backward-wave oscillator (RBWO); two electron beams; two-stream instability (TSI); PLASMA MICROWAVE ELECTRONICS; LINEAR-THEORY; POWER; AMPLIFIER; GENERATION; RESONATOR;

D O I：

10.1109/TPS.2013.2290327

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：

The radiation enhancement of a relativistic backward-wave oscillator (RBWO) driven by two annular electron beams is demonstrated in this paper. The slow-wave structure of RBWO is composed of a cylindrical grating with rectangular corrugation. The concentric electron beams are maintained with a velocity difference to initiate two-stream instability (TSI). The dispersion equations of the RBWO are derived and solved numerically for the growth rate of microwave signal. Compared with the single beam device, an enhancement in the growth rate is observed for the two beam case and that is attributed by the TSI. This theoretical observation is verified by 2-D particle in cell simulation and experiment. The experimental results show that the output power of 150 MW for a signal-beam device is enhanced to 200 MW for the two beam case and duration of microwave pulse is also enlarged from 10.6 to 16.8 ns. The efficiency of the devices is similar to 6%.

引用

页码：42 / 50

页数：9

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