迴旋管电子枪设计的简化模型方法

本文简要地叙述了迴旋管绝热磁控注入枪中的电子运动,提出在阴极附近引入一个温度限制发射的等效二极管的概念,并从对这个二极管中电子流的分析、双圆筒电极间的场分布和绝热理论出发,推导出由枪电极尺寸和电磁参量确定的电子注横向能量的计算公式 根据这个公式,可方便、迅速、准确地进行枪的主要参量的设计,或由实测参量判断整管中电子注的运动状态。 关于阴极电场的计算,曾对许多实际的绝热磁控枪用电子计算机进行数值计算分析对比,误差小于5％,与文献1]的计算机计算结果是一致的。简化模型方法已经实验验证,电子注横向能量的计算值与实验结果,基本吻合。

A METHOD BASED ON A SIMPLIFIED MODEL FOR DESIGN OF THE GYROTRON GUN

In this paper, electron motion in the adiabatic magnetron injection gun (AMIG) of Gyrotron is briefly described. A concept of equivalent diode operating with temperature limited emission in the cathode region is proposed. A formula calculating transverse beam energy determined by the electrode dimensions and electromagnetic parameters is derived from the adiabatic theory and the analysis of electron stream in this diode and the field between two concentric cylinders. With this formula, it is very convenient for us to rapidly and correctly determine the main parameters of the AMIG or judge the moving condition of the electron beam in Gyrotron according to practical parameters. The comparison between the calculations of the cathode field in this paper and the mumerical results of the AMIG given by computer shows that the difference is within five percent, and the former also coincide with the computed data from reference1]. The calculations of transverse beam energy are in good agreement with experimental results.