Plasma and Fusion Research

Volume 13, 3405036 (2018)

Regular Articles


Analysis Technique of Millimeter-Wave Propagating Modes in an Oversized Corrugated Waveguide Using Developed Beam Profile Monitors
Takashi SHIMOZUMA1), Sakuji KOBAYASHI1), Satoshi ITO1), Kohta OKADA2), Yasuhiko ITO1), Yasuo YOSHIMURA1), Hiroe IGAMI1), Hiromi TAKAHASHI1), Toru TSUJIMURA1), Yoshinori MIZUNO1) and Shin KUBO1,2)
1)
National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-Cho, Toki-City, Gifu 509-5292, Japan
2)
Nagoya University, Furo-Cho, Chikusa-Ku, Nagoya 464-8601, Japan
(Received 28 December 2017 / Accepted 16 March 2018 / Published 10 May 2018)

Abstract

A mode analysis technique of the millimeter-wave which propagates in the corrugated waveguide of the electron cyclotron resonance heating (ECRH) transmission line is proposed. The technique is based on the signals detected by beam-profile monitors (BPMs) developed and installed in the reflection plane mirror of the miterbends in the ECRH transmission line. The developed BPM consists of a mirror plate, Peltier-device array, and a heat-sink. The voltage signal of each Peltier device is related with the temperature of the mirror surface. The program which can analyze propagating-mode components using these signals is developed. The possibility of the propagating mode analyses using this code was confirmed using the artificially synthesized model data on the miterbend reflector.


Keywords

electron cyclotron resonance heating, mode analysis, corrugated waveguide, gyrotron, millimeter wave

DOI: 10.1585/pfr.13.3405036


References

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