SIMULATION OF AN ELECTRON BEAM IN A GYROTRON TAKING INTO ACCOUNT THE CATHODE SURFACE ROUGHNESS AND THERMAL EFFECTS IN THE ELECTRON GUN

被引：0
|
作者：
Louksha, O., I [1 ]
Trofimov, P. A. [1 ]
Malkin, A. G. [1 ]
机构：
[1] Peter Great St Petersburg Polytech Univ, 29 Politechn Skaya St, St Petersburg 195251, Russia
来源：
ST PETERSBURG POLYTECHNIC UNIVERSITY JOURNAL-PHYSICS AND MATHEMATICS | 2022年 / 15卷 / 03期
基金：
俄罗斯科学基金会;
关键词：
microwave electronics; gyrotron; helical electron beam; cathode; surface roughness; heating; QUALITY; IMPROVEMENT;
D O I：
10.18721/JPM.15310
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In the paper, a 3D trajectory analysis taking into account the surface roughness of the thermionic cathode and thermal effects caused by its heating has been performed in the electron-optical system of a gyrotron with a frequency of 74,2 GHz and an output power of approximately 100 kW. A new approach based on the use of standard settings available in the 3D simulation software when the model parameters of thermionic emission being given, was used for consideration of the micron-sized cathode surface roughness. A comparison between the calculated and experimental data made it possible to clarify the regularities of the influence of the initial velocity spread and the change of geometry of the cathode assembly caused by its heating on the parameters of the electron beam formed in the electron-optical gyrotron system.
引用
收藏
页码：132 / 142
页数：11
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