1. Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-shi, Ibaraki-ken 311-0193, Japan
2. Japan Atomic Energy Research Institute, Kansai Research Establishment, Tokai-mura, Naka-gun Ibaraki-ken 319-1195, Japan
3. Kyushu University, Research Institute for Applied Mechanics, Kasuga-shi, Fukuoka-ken 816-8580, Japan
4. National Institute for Fusion Science, Toki-shi, Gifu-ken 509-5292, Japan
5. Kanazawa University, Kanazawa-shi, Ishikawa-ken 920-8667, Japan
6. Chubu University, College of Engineering, Kasugai-shi, Aichi-ken 487-8501, Japan
7. The University of Tokyo, Graduate School of Frontier Sciences, Kashiwa-shi, Chiba-ken 277-8561, Japan
8. Chuo University, The Faculty of Science and Engineering, Bunkyo-ku, Tokyo-to 112-8551, Japan
9. Joetsu University of Education, Joetsu-shi, Niigata-ken 943-8512, Japan