Design of Quasi-Optical Mode Converter for 170-GHz TE32,9-Mode High-Power Gyrotron

被引：9
作者：
Zhao, Guohui [1 ,2 ]
Xue, Qianzhong [1 ,2 ]
Wang, Yong [1 ,2 ]
Wang, Xuewei [1 ,2 ]
Zhang, Shan [1 ,2 ]
Liu, Gaofeng [1 ,2 ]
Feng, Jinjun [3 ]
Zhang, Lianzheng [1 ]
机构：
[1] Chinese Acad Sci, Inst Elect, Key Lab High Power Microwave Sources & Technol, Beijing 101407, Peoples R China
[2] Univ Chinese Acad Sci, Sch Elect Elect & Commun Engn, Beijing 100408, Peoples R China
[3] Beijing Vacuum Elect Res Inst, Vacuum Elect Natl Lab, Beijing 100015, Peoples R China
来源：
IEEE TRANSACTIONS ON PLASMA SCIENCE | 2019年 / 47卷 / 05期
基金：
美国国家科学基金会;
关键词：
Gyrotrons; launcher; mirror system; quasi-optical mode converter;
D O I：
10.1109/TPS.2019.2908503
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
In this paper, a design of quasi-optical mode converter for 170-GHz TE32,(9)-mode high-power gyrotron is presented in detail. The quasi-optical mode converter consists of a launcher and a mirror system. A MATLAB code for analysis of the electromagnetic fields at the launcher wall and in mirror systems has been developed. The numerically optimized launcher can generate a Gaussian-like mode with a scalar correlation coefficient of 99.6% and a vector correlation coefficient of 99.1% at the launcher aperture. The radiation fields of the launcher are analyzed in the free space. The mirror system consists of four analytic surface mirrors and a phase-correction mirror. After the phase correction, the scalar Gaussian mode content and vector Gaussian mode content on the output window are 99.1% and 97.1%, respectively. The performance of the mirrors is calculated and analyzed. The power transmission efficiency of each mirror is above 99.8%, and the efficiency of the quasi-optical mode converter is 96.77%.
引用
收藏
页码：2582 / 2589
页数：8
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