skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: High power operation of Gaussian beam gyrotron with CVD diamond window for JT-60U

Abstract

A 110 GHz-Gaussian beam output gyrotron with CVD (Chemical Vapor Deposition) diamond window was developed for the electron cyclotron heating and current drive on JT-60U. A stable Gaussian output beam power of 1.1 MW-0.1 s was obtained with the efficiency of 39% with depressed collector operation. Due to Gaussian beam output from the gyrotron, the coupling efficiency to HE11 mode in the mirror optical unit was 94%. Moreover, the transmission efficiency of 89% for HE11 mode was performed at the power level of 1 MW on the 40 m-transmission test line of {phi}31.751 mm corrugated waveguide and 8-miter bends included 1-pair of polarizer. The gyrotron and transmission line were installed into JT-60U system and 0.6 MW-0.3 s power was successfully injected into JT-60U plasmas as an initial operation.

Authors:
; ; ; ; ;  [1]; ;  [2];
  1. RF Heating Laboratory, Naka Fusion Research Establishment, Japan Atomic Energy Research Institute (JAERI), Naka-machi, Ibaraki-ken, Japan 311-0193 (Japan)
  2. Electron Tubes and Devices Division, Toshiba Corporation, Ohtawara-shi, Tochigi, 324-8550 (Japan)
Publication Date:
OSTI Identifier:
21210505
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 485; Journal Issue: 1; Conference: 13. topical conference on radio frequency power in plasmas, Annapolis, MD (United States), 12-14 Apr 1999; Other Information: DOI: 10.1063/1.59706; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CHEMICAL VAPOR DEPOSITION; COUPLING; DIAMONDS; ECR CURRENT DRIVE; ECR HEATING; EFFICIENCY; GHZ RANGE; JT-60U TOKAMAK; MICROWAVE AMPLIFIERS; MIRRORS; OPERATION; PLASMA; POWER TRANSMISSION LINES; RF SYSTEMS; WAVEGUIDES

Citation Formats

Kasugai, Atsushi, Takahashi, Koji, Sakamoto, Keishi, Ikeda, Yukiharu, Ikeda, Yoshitaka, Tsuneoka, Masaki, Kariya, Tsuyoshi, Mitsunaka, Yoshika, and Imai, Tsuyoshi. High power operation of Gaussian beam gyrotron with CVD diamond window for JT-60U. United States: N. p., 1999. Web. doi:10.1063/1.59706.
Kasugai, Atsushi, Takahashi, Koji, Sakamoto, Keishi, Ikeda, Yukiharu, Ikeda, Yoshitaka, Tsuneoka, Masaki, Kariya, Tsuyoshi, Mitsunaka, Yoshika, & Imai, Tsuyoshi. High power operation of Gaussian beam gyrotron with CVD diamond window for JT-60U. United States. doi:10.1063/1.59706.
Kasugai, Atsushi, Takahashi, Koji, Sakamoto, Keishi, Ikeda, Yukiharu, Ikeda, Yoshitaka, Tsuneoka, Masaki, Kariya, Tsuyoshi, Mitsunaka, Yoshika, and Imai, Tsuyoshi. Mon . "High power operation of Gaussian beam gyrotron with CVD diamond window for JT-60U". United States. doi:10.1063/1.59706.
@article{osti_21210505,
title = {High power operation of Gaussian beam gyrotron with CVD diamond window for JT-60U},
author = {Kasugai, Atsushi and Takahashi, Koji and Sakamoto, Keishi and Ikeda, Yukiharu and Ikeda, Yoshitaka and Tsuneoka, Masaki and Kariya, Tsuyoshi and Mitsunaka, Yoshika and Imai, Tsuyoshi},
abstractNote = {A 110 GHz-Gaussian beam output gyrotron with CVD (Chemical Vapor Deposition) diamond window was developed for the electron cyclotron heating and current drive on JT-60U. A stable Gaussian output beam power of 1.1 MW-0.1 s was obtained with the efficiency of 39% with depressed collector operation. Due to Gaussian beam output from the gyrotron, the coupling efficiency to HE11 mode in the mirror optical unit was 94%. Moreover, the transmission efficiency of 89% for HE11 mode was performed at the power level of 1 MW on the 40 m-transmission test line of {phi}31.751 mm corrugated waveguide and 8-miter bends included 1-pair of polarizer. The gyrotron and transmission line were installed into JT-60U system and 0.6 MW-0.3 s power was successfully injected into JT-60U plasmas as an initial operation.},
doi = {10.1063/1.59706},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 485,
place = {United States},
year = {1999},
month = {9}
}