Plasma and Fusion Research

Volume 7, 2405029 (2012)

Regular Articles

Recent Results from the Development of the Electron Cyclotron Heating System for JT-60SA toward High-Power Long-Pulse Operations
Akihiko ISAYAMA, Takayuki KOBAYASHI, Kenji YOKOKURA, Mitsuru SHIMONO, Masauki SAWAHATA, Sadaaki SUZUKI, Masayuki TERAKADO, Shinichi HIRANAI, Kenji WADA, Jun HINATA, Yoshikatsu SATO, Katsumichi HOSHINO, Shinichi MORIYAMA, Keishi SAKAMOTO and Kiyotaka HAMAMATSU
Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan
(Received 1 December 2011 / Accepted 27 January 2012 / Published 10 May 2012)

Abstract

Development of an electron cyclotron (EC) wave system was conducted in an effort to achieve the capability required in JT-60SA. Pulse duration at 1 MW output was extended to 31 s. Transmission line components with a diameter of 60.3 mm were installed in 2011 to reduce temperature rise during a gyrotron oscillation. Development of a dual-frequency gyrotron was started to enable heating and current drive in the core region of the JT-60SA plasma for the toroidal field of 2.3 T. The EC wave frequency was chosen to be 138 GHz to meet the requirements of physics experiments and gyrotron design. Fabrication of the gyrotron began in 2011.

Keywords

electron cyclotron wave, ECH, ECCD, gyrotron, waveguide, JT-60SA

DOI: 10.1585/pfr.7.2405029

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This paper may be cited as follows:

Akihiko ISAYAMA, Takayuki KOBAYASHI, Kenji YOKOKURA, Mitsuru SHIMONO, Masauki SAWAHATA, Sadaaki SUZUKI, Masayuki TERAKADO, Shinichi HIRANAI, Kenji WADA, Jun HINATA, Yoshikatsu SATO, Katsumichi HOSHINO, Shinichi MORIYAMA, Keishi SAKAMOTO and Kiyotaka HAMAMATSU, Plasma Fusion Res. 7, 2405029 (2012).