Research and Development of 2-frequency (110/138 GHz) FADIS for JT-60SA ECHCD system H. Idei, S. Moriyama, T. Kobayashi, A. Isayama, M. Sakaguchi and W. Kasparek EPJ Web of Conferences, 87 (2015) 04009 Published online: 12 March 2015 DOI: 10.1051/epjconf/20158704009