基于热阴极的相对论返波管电子枪设计  

Design of electron gun of relativistic backward wave oscillator based on thermionic cathode

作　　者：刘军乐 邵文生[1] 于志强[1] LIU Junle;SHAO Wensheng;YU Zhiqiang(Beijing Vacuum Electronics Research Institute,Beijing 100015,China)

机构地区：[1]北京真空电子技术研究所,北京100015

出　　处：《太赫兹科学与电子信息学报》2018年第1期131-134,共4页Journal of Terahertz Science and Electronic Information Technology

摘　　要：近年来热阴极特别是钪系阴极得到充分发展,有望成为高功率微波的电子源。提出一种基于热阴极的新型"面包圈"式电子枪模型,以此电子枪作为相对论返波管的环形电子束发射源。通过仿真软件CST PARTICLE STUDIO对模型进行仿真验证,所得电子枪发射电流为786 A,阴极发射电流密度为30 A/cm2,电子束密度为305 A/cm2,电子通过率为99.9%。最后对热阴极在高功率微波器件中的应用进行了初步探索。Having been fully developed in recent years,thermionic cathodes,especially scandate cathodes,are promised to be the electron source of high power microwave devices.A novel bagel-shaped E-gun based on thermionic cathode is proposed and used as the annular electron beam source of relativistic backward wave oscillator.The emission current of this model is obtained to be 786 A,the emission current density of cathode 30 A/cm2,the electron beam density 305 A/cm2,and the electron pass rate 99.9%via simulating the E-gun with CST particle studio.The application of thermionic cathodes in high power microwave device is also explored.

关 键 词：环形电子束 热阴极 相对论返波管 高功率微波 

分 类 号：TN125[电子电信—物理电子学]