强激光与粒子束2011，Vol.23Issue(11)：3069-3072,4.DOI:10.3788/HPLPB20112311.3069
一种提高相对论返波管功率容量的方法
A method for improving power capability of relativistic backward wave oscillator
摘要
Abstract
This paper analyzes and simulates the RF breakdown in relativistic backward wave oscillator(RBWO). The RF breakdown which occurs on the surface of resonant reflector and slow wave structure(SWS) is induced by field emission. A method is proposed for reducing the surface field intensity, which utilizes cascade feedback reflector and trapezoid SWS with chamfering. The trapezoid SWS is axially lengthened at the minimum radius place for weakening field intensity so that the power capability of RBWO is increased availably. Simulation results indicate that the field intensity reduces from 1 400 to 570 kV/cm on the cascade feedback reflector, and from 1 100 to 780 kV/cm on the trapezoid SWS. Experiment results indicate that the microwave power and the pulse duration increase. A microwave with a power of 2. 2 GW and a pulse duration of 45 ns is obtained in the experiment with the improved structure of RBWO, when the diode voltage is 765 kV.关键词
相对论返波管/射频击穿/功率容量/谐振反射器/慢波结构Key words
relativistic backward wave oscillator/ RF breakdown/ power capability/ resonant reflector/ slow wave structure分类
信息技术与安全科学引用本文复制引用
张晓微,肖仁珍,陈昌华,张黎军,张立刚..一种提高相对论返波管功率容量的方法[J].强激光与粒子束,2011,23(11):3069-3072,4.基金项目
国家高技术发展计划项目 （）
