星载行波管高效率阴极热子组件优化设计  

Optimization of high-efficiency space traveling wave tube's cathode-heater assembly

作　　者：李鑫伟[1,2] 尚新文[1,2] 刘韦[1] 肖刘[1] 俞世吉[1] 苏小保[1] 

机构地区：[1]中国科学院电子学研究所,高功率微波源与技术重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《强激光与粒子束》2015年第5期149-153,共5页High Power Laser and Particle Beams

基　　金：国家高技术发展计划项目

摘　　要：为减小X波段星载脉冲行波管的热子功率,对阴极热子组件结构进行了优化设计,利用ANSYS有限元软件对该阴极热子组件结构进行了热分析,得到结构的稳态温度场分布、阴极温度瞬态解以及加热功率与阴极温度的关系,并与实测结果进行对比,对比结果表明,阴极温度模拟与实验结果误差在1.3%以内,说明了所用模型和方法的可行性。在此基础上通过研究阴极支持筒不同开槽宽度、壁厚及材料下热子加热功率-阴极温度关系,对阴极支持筒进行了优化。模拟结果显示,优化后的阴极热子组件结构加热功率由8.2W降到6.7 W。The structure of the cathode-heater assembly has been changed appropriately in order to reduce the heating power of some X-band space pulsed TWT. Thermal characters of cathode-heater assembly are analyzed using finite element software ANSYS, and its steady-state temperature distribution, cathode temperature transient solution and the relationship between heat- ing power and cathode temperature are obtained. Simulation results are compared with test data, which shows that the calculation error of cathode temperature is within 1.3 %, indicating the model and the methods have been correctly used. Then the structure of the cathode support cylinder is optimized by studying the relationship between heating power and cathode temperature under different slot width, thickness and material. Simulation results show that the optimized cathode-heater assembly＇s heating power is reduced from 8.2 W to 6.7 W.

关 键 词：阴极热子组件 热效率 ANSYS有限元软件 优化设计 

分 类 号：O462.1[理学—电子物理学]