Research Institute for Applied Mechanics;
Kyushu University;
Fukuoka 816-8580;
Japan;
Interdisciplinary Graduate School of Engineering Science;
Kyushu University;
Fukuoka 816-8580;
Japan;
School of Industrial Engineering;
Tokai University;
Kumamoto 862-8652;
Japan;
Graduate School of Technology;
Kyoto University;
Kyoto 615-8530;
Japan;
Graduate School of Frontier Science;
University of Tokyo;
Chiba 277-8561;
Japan;
Institute of Plasma Physics;
Chinese Academy of Sciences;
Hefei 230031;
China;
Princeton Plasma Physics Laboratory;
Princeton NJ 08540;
USA;
SAeronautics&Astronautics;
University of Washington;
Seattle WA 98195-2400;
USA;
steady state operation; spherical tokamak; plasma wall interaction; power balance;