低速度零散的双阳极磁控注入电子枪设计  

Design of double-anode magnetic injection with low velocity spread

作　　者：胡鹏[1,2] 孙迪敏[1] 蒋艺[1] 陈洪斌[1] 孟凡宝[1] 

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900 [2]中国工程物理研究院研究生部,四川绵阳621900

出　　处：《强激光与粒子束》2013年第3期671-674,共4页High Power Laser and Particle Beams

摘　　要：根据0.14THz共焦波导回旋行波管对电子枪的要求,完成了双阳极磁控注入电子枪的设计。使用PIC软件对理论设计得到的结构参数进行了模拟优化,最终得到该枪的电子注横纵速度比为0.75,纵向速度零散1.33%。讨论了电极形状、阴极磁场、控制极电压及发射电流对电子注性能的影响,结果表明,设计过程中应对它们进行充分的优化。A double-anode magnetic injection gun （MIG） was designed to satisfy demands of the 0.14 THz confocal gyro- travelling-wave tube （TWT）. According to analytic trade-off equations, the initial parameters were determined first, then simula- tions and refinement were done with the PIC software. As a result, the horizontal-to-vertical velocity ratio of this MIG is 0.75, the axial velocity spread is 1.33 %. The effect of some parameters, such as electrode shape, cathode magnetic field, mod-anode voltage and beam current on electron beam performance was discussed. The results indicate, all the parameters should be opti- mized sufficiently.

关 键 词：太赫兹 回旋行波管 双阳极磁控注入枪 横纵速度比 速度零散 

分 类 号：TN129[电子电信—物理电子学]