325 MHz微波栅控高压型热阴极电子枪的设计研究  

Design of 325 MHz RF grid-controlled high voltage thermionic cathode electron gun

作　　者：夏乾旭 赵全堂[1,2] 宗阳 曹树春[1,2] 李中平[1,2] 申晓康 张子民[1,2] Xia Qianxu;Zhao Quantang;Zong Yang;Cao Shuchun;Li Zhongping;Shen Xiaokang;Zhang Zimin(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049.China)

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]中国科学院大学核科学与技术学院,北京100049

出　　处：《强激光与粒子束》2021年第4期110-116,共7页High Power Laser and Particle Beams

基　　金：国家重点研发计划项目(2016YFE0104900)。

摘　　要：高重复频率、高平均流强的电子枪具有十分广泛的应用。设计了一台束团重复频率为325 MHz在CW模式工作的微波栅控高压型热阴极电子枪,并详细论述了该类型微波栅控电子枪的实验原理。在该类型电子枪的设计中,首先需要利用仿真模拟软件EGUN、POISSON(PoissonSuperfish)、GPT(General Particle Tracer)完成300 kV直流高压电子枪的结构设计,并进行束流动力学验证计算。为将微波馈入该直流电子枪的阴栅极之间,进行了该微波栅控电子枪的供电系统设计,完成了从射频功率源到同轴热阴极的阻抗匹配方案,设计了一种325 MHz双模式同轴供电器件,并进行了验证与分析。The electron gun with high repetition rate and high average current has a very wide range of applications.This paper presents the design of a microwave grid-controlled high-voltage thermionic electron gun working in CW mode with a bunch repetition rate of 325 MHz and elaborates the experimental principles of this kind of electron guns.Firstly,simulation software EGUN,POISSON(Poisson Superfish)and GPT(General Particle Tracer)are used to accomplish the structure design of a 300 kV high-voltage DC electron gun and beam dynamics verification.Secondly,to feed the microwave into the gap between the cathode and the grid of the electron gunefficiently,design of a power supply with a scheme of impedance matching from the radio frequency power source to the cathode is completed.Accordingly,a 325 MHz dual-mode coaxial power supply device is designed,and its feasibility is verified and analyzed..

关 键 词：微波栅控电子枪 阻抗匹配 束流动力学 稳态高压平台 

分 类 号：TL53[核科学技术—核技术及应用]