Overview of modification of JT-60U for the satellite tokamak program as one of the broader approach projects and national program

Kikuchi, Mitsuru; Matsukawa, Makoto; Fujita, Takaaki; Tamai, Hiroshi ; Sakurai, Shinji; Kizu, Kaname; Tsuchiya, Katsuhiko; Ikeda, Yoshitaka

Modification of JT-60 as a combined program of Japan-EU satellite tokamak and national program will be reported. Modification of JT-60U to a superconducting device has been planned as a national device to establish high beta steady state operation of tokamak toward DEMO. Recently, this modification is re-assessed as a satellite tokamak in the Broader Approach project to contribute and supplement ITER toward DEMO. JA-EU satellite tokamak working group has been formed to asess this design and modification of design in TF magnet, H and CD system and plasma facing components are made. Satellite tokamak program and national program have largely common scientific missions. Main functions in support of ITER are optimization of operational scenarios for ITER and understanding of physics issues. The main function in support of DEMO is to explore operational regimes and issues of steady-state operation, advanced high beta regimes, and control of power and particle control complementary to those being addressed in ITER. National program specifically identify research targets.