Imaging and Mode Content Analysis of the Wave Beam From a Short-Pulse High-Power Gyrotron Using the Millimeter-Wave-Induced Gas Breakdown Initiated by a Metal-Dielectric Screen

被引：0

作者：

Ananicheva, Svetlana A. ^{[1
]}

Bogdashov, Alexander A. ^{[1
]}

Fokin, Andrey P. ^{[1
]}

Gitlin, Mikhail S. ^{[1
]}

Gashturi, Anton P. ^{[1
]}

Luchinin, Alexey G. ^{[1
]}

Orlovskiy, Alexey A. ^{[1
]}

Tsvetkov, Alexandr I. ^{[1
]}

Glyavin, Mikhail Yu. ^{[1
]}

机构：

[1] Russian Acad Sci IAP RAS, Inst Appl Phys, FSBSI Fed Res Ctr, Nizhnii Novgorod 603950, Russia

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2023年 / 51卷 / 05期

基金：

俄罗斯基础研究基金会;

关键词：

Gyrotrons; Particle beams; Plasmas; Electric breakdown; Mirrors; Microwave imaging; Surface waves; gyrotrons; millimeter-wave (MMW) imaging; plasma applications; transmission line modeling; SCATTERING;

D O I：

10.1109/TPS.2023.3264818

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：

The wave beam of a sub-terahertz (THz) gyrotron with a pulsed magnetic field was imaged in a single pulse using a microwave-induced gas breakdown initiated by a metal-dielectric (MD) screen. Images of sub-THz beams, which were recorded at the output of a quasi-optical mode converter, were compared with data obtained by numerical simulation of propagation and transformation of the wave beam from the gyrotron. The analysis of the waveguide mode content in the gyrotron was done. Based on experimental and simulation data, it was shown that the distortion of the sub-THz wave beam is caused by the deformation of the Teflon window at the gyrotron output. Based on the results of the study, the gyrotron was modified, and the quality of its wave beam was improved.

引用

页码：1256 / 1260

页数：5