Harmonic terahertz gyrotron with a double confocal quasi-optical cavity

被引：14

作者：

Fu, Wenjie ^{[1
]}

Guan, Xiaotong ^{[1
]}

Yan, Yang ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Elect Sci & Engn, Terahertz Res Ctr, Chengdu 610054, Sichuan, Peoples R China

来源：

PHYSICS OF PLASMAS | 2019年 / 26卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Gyrotrons;

D O I：

10.1063/1.5090471

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：

To reduce mode competition in a high-harmonic terahertz gyrotron, the gyrotron with a quasi-optical confocal cavity is proposed. Theoretical and experimental investigations demonstrate that the confocal cavity has good-mode selection and is suitable for high-harmonic operation. However, due to the transverse nonuniformity of the radio frequency field, the beam-wave interaction efficiency is low in the confocal cavity. To mitigate this drawback, the double confocal cavity is investigated in this study. Through three-dimensional particle-in-cell simulation on a designed 330-GHz gyrotron with a double confocal cavity, the physical mechanism of beam-wave interactions in a double confocal cavity is analyzed and presented. Published under license by AIP Publishing.

引用

页数：6

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