Measurements of microwave transmission mode in HL-3 tokamak relevant ECH corrugated waveguides transmission line

被引：0

作者：

Fan, Guoyao ^{[1
]}

Huang, Mei ^{[1
]}

Xia, Donghui ^{[2
]}

Chen, Cheng ^{[1
]}

Zhang, Feng ^{[1
]}

Chen, Xixuan ^{[2
]}

Zheng, Wanxin ^{[1
]}

Chen, Gangyu ^{[1
]}

机构：

[1] Southwestern Inst Phys, Chengdu 610025, Sichuan, Peoples R China

[2] Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, State Key Lab Adv Electromagnet Technol Int Joint, Wuhan 430074, Peoples R China

来源：

FUSION ENGINEERING AND DESIGN | 2024年 / 208卷

基金：

中国国家自然科学基金;

关键词：

Corrugated waveguide; Transmission line; Electron cyclotron heating; Phase retrieval; Mode analysis; ECRH SYSTEM; CURRENT DRIVE;

D O I：

10.1016/j.fusengdes.2024.114677

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The transmission modes of high-power millimeter wave in corrugated waveguides transmission line (TL) are crucial, especially for the long-pulse operation for long-distance TL. The microwave transmission mode in the TL on HL-3 tokamak relevant the electron cyclotron heating system are studied for the purpose according to the phase retrieval method based on intensity distribution measured by an infrared camera at several different locations away from the outlet of TL. A specific high power test platform with about 40-meter TL is established and the mode contents in the middle and the end of the TL are analyzed. In the middle of the TL, the proportion of main transmission mode LP01 mode is about 97 % and other high-order modes contents are <3 %. In the end of the TL, the main mode purity is about 94 %, and the high-order mode, LP11 even mode is excited about 4.6 %. These mode analysis results indicate that the high-power and long-pulse millimeter wave corrugated waveguides TL are designed and machined well, and the alignment method for long distance transmission line installation is highly useful for high-purity wave mode transmission.

引用

页数：8

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