束流预调制型同轴虚阴极振荡器的初步理论分析  

Analysis of coaxial vircator with beam premodulation by solving Green function

作　　者：张永鹏[1,2] 张余川[2] 宋志敏[2] 

机构地区：[1]清华大学工程物理系高能辐射成像国防重点学科实验室,北京100084 [2]西北核技术研究所,西安710024

出　　处：《强激光与粒子束》2009年第4期516-520,共5页High Power Laser and Particle Beams

摘　　要：利用求解格林函数的方法,对束流预调制型同轴虚阴极振荡器进行了初步理论分析。分析结果表明,相同参数入射电子束同轴虚阴极振荡器的束波转换效率正比于预调制深度的平方,提高预调制的深度可以很好地提高束波转换效率;任意的束波互作用区结构参数和入射束流分布参数,都会存在一个对应工作状态下最大束波转换效率的最佳预调制频率,合理选择预调制频率可以优化同轴虚阴极振荡器的微波输出。Coaxial vircator with beam premodulation is analyzed by solving Green＇s function, and the relationships of beamwave conversion efficiency to premodulation depth and frequency are obtained. Analysis results show that beam-wave conversion efficiency is in direct proportion to second power of premodulation depth for the same injecting beam, and there is a certain premodulation frequency corresponding to a maximal efficiency for every injecting beam and beam-wave interaction area combination. Finally, enhancing premodulation depth and choosing a reasonable premodulation frequency as efficacious ways to improve beam- wave conversion efficiency are suggested.

关 键 词：同轴虚阴极振荡器 束流预调制 格林函数 束波互作用 

分 类 号：TN128[电子电信—物理电子学] O441[理学—电磁学]