Research and Development of 2-frequency (110/138 GHz) FADIS for JT-60SA ECHCD system
1 Research Institute for Applied Mechanics, Kyushu Univ., Kasuga, 816-8580, Japan
2 Japan Atomic Energy Agency, Naka, 311-0193, Japan
3 Furukawa C & B Co., Ltd., Yamato, 242-0018, Japan
4 Institute of Interfacial Process Engineering and Plasma Technology, Pfaffenwaldring 31, D-70569 Stuttgart, Germany
Published online: 12 March 2015
A FAst DIrectional Switch (FADIS) of 2-frequency (2-ƒ) gyrotron system for the JT-60SA project is being developed under collaboration between Japan Atomic Energy Agency (JAEA) and Kyushu University. At first, the frequency drift and dip in the gyrotron operation were measured to consider which kind of FADIS is preferred for application in the Electron Cyclotron Heating and Current Drive (ECHCD) system for the JT- 60SA. Various types of the FADIS have been considered. A square corrugated waveguide diplexer system with double resonant rings was considered as one of the most attractive FADIS systems for stable high-power and long-pulse operations in the 2-ƒ JT-60SA ECHCD system.
© Owned by the authors, published by EDP Sciences, 2015
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