3mm回旋行波放大器单阳极磁控注入式电子枪的设计  

Design of a Single-anode Magnetron-injected-gun for the 3mm GYRO-TWT Amplifiers

作　　者：殷瑞剑[1] 刘濮鲲[1] 

机构地区：[1]中国科学院电子学研究所

出　　处：《电子与信息学报》2008年第6期1507-1510,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60571039);国家杰出青年科学基金(60125104)资助课题

摘　　要：该文根据3mm回旋行波放大器对电子枪的要求,完成了单阳极磁控注入式电子枪的设计。首先由绝热理论和角动量守恒关系式,求出了电子枪的初始设计参数,如阴极倾角、电子注发射表面宽度和阴-阳极间距离等;然后借助电子注轨迹分析程序EGUN,利用数值计算的方法得到了最终的电子注参数。结果显示:在电子注加速电压70kV,工作电流4.55A,电子注的横向与纵向速度比为1.0时,电子注的轴向速度零散为2.4%,能够满足回旋行波管放大器对电子注低速度零散的要求。A single-anode electron gun is designed and simulated according to the requirements of the gyrotron traveling wave amplifier. Firstly, the initial parameters for example the cathode angle, the cathode emitter strip and the distance between cathode and mod-anode are designed based on analytic trade-off equations. Secondly, the final beam parameters are determined with the electron trajectory code EGUN. The results reveal that when the accelerated voltage is 70kV and the beam current is 4.55A, electron gun has the axial velocity spread of 2.4%, and the ratio of the transverse velocity to the axial velocity is equal to 1.0, which can satisfy the requirement of the low electron beam velocity spread in the gyrotron traveling wave amplifier.

关 键 词：回旋行波放大器 电子枪 单阳极 速度零散 

分 类 号：TN124[电子电信—物理电子学]