Ka波段回旋行波管阴极组件研制  

Development of Cathode Assemblies for Ka-Band Gyro-TWTs

作　　者：王辉[1] 刘本田[1] 邵文生[1] 李季[1] 

机构地区：[1]北京真空电子技术研究所,北京100015

出　　处：《真空电子技术》2015年第6期14-17,共4页Vacuum Electronics

摘　　要：环形阴极组件是回旋管磁控注入枪的关键部件,其性能直接影响了电子枪乃至整管的特性。本文对用于Ka波段回旋行波管的环形覆膜阴极组件进行了初步研究。热模拟分析和实验结果表明,阴极表面的温度分布比较均匀;表面测量和分析显示,阴极表面的粗糙度大约为0.3μm,膜层均匀不连续地分布在表面,保证了发射能力和电子注的高质量。整管测试结果显示,阴极可以提供10-13 A的发射电流,满足了整管要求。最后对阴极发射不均匀性进行了分析。Annular cathode assembly is a key component in magnetron injection gun（MIG） for a GyroTWT and it has an important influence on the performance of the electron gun as well as the whole tube.In this paper,a preliminary study is made on M-type annular cathode assemblies for Ka-band Gyro-TWTs.Both thermal analysis and experimental results show that the temperature distribution on cathode surface is uniform,and osmium coated on cathode surface forms discontinuous but uniform film with a roughness of0.3 μmm,all these ensure the cathodes good emission ability and high quality electron beams.The cathode assemblies deliver 10~13 A current which can meet the requirements of the tubes.Finally,the nonuniformity of cathode emission is analyzed.

关 键 词：阴极组件 均匀性 粗糙度 覆膜 模拟分析 

分 类 号：TN124[电子电信—物理电子学]