低反轰热阴极微波电子枪初步实验  

Preliminary experiment of thermionic RF gun with low back-bombardment

作　　者：柏伟[1] 黎明[1] 沈旭明[1] 陈亚男[1] 王汉斌[1] 单李军[1] 陈天才[1] 

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2011年第10期2729-2731,共3页High Power Laser and Particle Beams

摘　　要：简述了紧凑型自由电子激光太赫兹源研制的系统设计方案,介绍了具有两路微波馈入的热阴极微波电子枪的研制与测试情况,利用束流传感器测试了束流强度,并利用CCD相机测试了束斑大小,给出了微波电子枪通过初步热测实验得到的结果。测得微波电子枪出口处束流强度超过500mA,束斑约3mm,采用双屏法测量束流发射度,得到归一化发射度约为13.5π.mm.mrad,测试指标与理论设计值吻合较好。A design scheme of amicrowave gun with two independent microwave power feed-in ports is proposed.Numerical simulation results show that the electron back-bombardment of the thermionic-cathode microwave gun can be greatly decreased,and high quality electron beams can be obtained by adjusting the phase displacement between the two microwave ports.Cold test results of the resonance frequency of the cavities and the field distribution of the RF gun are given.Prelimilary hot test results show that,the beam current intensity and spot size at the gun output port are over 500 mA and around 3 mm,respectively,and the normalized emittance is 13.5π·mm·mrad,which is obtained with dual-screen measurement.The measured parameters agree well with the theoretical design.

关 键 词：紧凑型 太赫兹源 热阴极微波电子枪 自由电子激光 

分 类 号：TL503[核科学技术—核技术及应用]