四注行波管周期永磁聚焦系统的优化设计  

Optimal design of periodic permanent magnetic focusing system for four-beam traveling wave tubes

作　　者：程玲莉 王林梅[1] 王敬东 王磊 袁涛 谭福明 Cheng Lingli;Wang Linmei;Wang Jingdong;Wang Lei;Yuan Tao;Tan Fuming(The Ninth Research Institute of China Electronics Technology Corporation,Mianyang 621000,China)

机构地区：[1]中国电子科技集团公司第九研究所

出　　处：《强激光与粒子束》2019年第11期51-57,共7页High Power Laser and Particle Beams

基　　金：国家重大科技专项资助项目（JZX2016-0528/Y191）

摘　　要：根据电子注参数、布里渊磁场公式及周期聚焦系统轴向磁通密度峰值经验公式,计算出永磁聚焦系统轴向峰值磁通密度,利用Ansoft Maxwell 3D软件建立了四注行波管周期永磁聚焦系统仿真模型,对模型结构尺寸进行了参数化分析,研究了周期永磁聚焦系统结构尺寸对聚焦系统通道内磁通密度的影响,确定了磁聚焦系统结构最佳尺寸配合,优化设计出了四注行波管周期永磁聚焦系统。其电子注通道中心轴线上轴向磁通密度峰值B z=309 mT,横向磁通密度B t=2.86 mT,B t/B z=0.92%。According to the electron beam parameters and Brillouin magnetic field formula and the axial magnetic flux density peak empirical formula of the periodic focusing system,the axial peak magnetic flux density of the permanent magnet focusing system is calculated.The simulation model of the permanent magnet focusing system of the four-beam travelling wave tube is established by Ansoft Maxwell 3D software.The structural dimensions of the model are parametrically analyzed,the influence of the structural dimension of the periodic permanent magnet focusing system on the magnetic field in the tunnel is studied,the optimal size matching of the magnetic focusing system is determined,and the periodic permanent magnet focusing system of the four-beam traveling wave tube is optimally designed.The axial magnetic flux density peak B z=309 mT,the transverse magnetic flux density B t=2.86 mT,B t/B z=0.92%on the central axis of the electron beam tunnel.

关 键 词：四注行波管 周期永磁聚焦系统 电子注通道 磁通密度 

分 类 号：TN124[电子电信—物理电子学] TM144[电气工程—电工理论与新技术]