强流相对论电子束双腔纵向自调制研究  

Longitudinal self-modulation of an intense relativistic electron beam in a two-cavity system

作　　者：胡旻[1] 祝大军[1] 刘盛纲[1] 

机构地区：[1]电子科技大学物理电子学院,成都610054

出　　处：《物理学报》2005年第6期2633-2637,共5页Acta Physica Sinica

基　　金：国家863高技术发展计划项目(批准号:2004AA832102)资助的课题.~~

摘　　要：当强流相对论电子束在类双腔速调管系统中传输时,会发生自调制现象.利用这一现象可以在无微波注入的情况下得到较好的微波输出,这是一种由强流相对论效应引起的自激振荡.利用这一原理有可能研制出一类新型的微波器件.对强流相对论电子束在这种物理机制作用下发生起振的条件及传输机理进行了理论分析,并进行了数值模拟.优化结果显示,利用4kA,500kV的强流相对论电子束,可得到0.99GHz,800MW的微波输出,效率约40%.Self-modulation may appear on an intense relativistic electron beam(IREB) traversing a two-cavity klystron system. It is caused by the intense relativistic effect. RF output can be obtained without RF input. Based on this mechanism, a new type of high-power microwave source is suggested. The oscillation condition of the intense relativistic election beam, traverse mechanism and PIC simulation are presented. After optimization design, a 800MW output peak microwave power was observed at a frequency of 0.99GHz, while an electron beam of voltage 500kV, current 4kA is injected. The efficiency is about 40%.

关 键 词：强流相对论电子束 自调制 反馈机制 数值模拟 自激振荡 

分 类 号：TN62[电子电信—电路与系统]