Author/Authors :
Nagashima ، نويسنده , , K. and Kikuchi، نويسنده , , M. and Kurita، نويسنده , , G. and Ozeki، نويسنده , , T. and Aoyagi، نويسنده , , T. and Ushigusa، نويسنده , , K. and Neyatani، نويسنده , , Y. and Kubo، نويسنده , , T. and Mori، نويسنده , , K. Yuasa-Nakagawa، نويسنده , , S. and Kuriyama، نويسنده , , M. and Nagami، نويسنده , , M.، نويسنده ,
Abstract :
The JT-60 Super Upgrade (JT-60SU) is an upgraded tokamak device of JT-60U for developing the steady-state reactor and advanced tokamak operation in the International Thermonuclear Experimental Reactor. The device is planned to utilize the JT-60 facilities fully and to minimize the needed modification. The major radius is 4.8 m and the maximum plasma current is 10 MA. Neutral beam injection with 750 keV beam energy is the primary heating method. The machine is capable of steady-state operation with high density up to 8.8 × 1019 m−3 at 5 MA plasma current. The high operating density, over the Greenwald et al. limit, is critically important in order to achieve high bootstrap current fraction. Ballooning mode and low n ideal magnetohydrodynamic (MHD) mode including the bootstrap current were analyzed for steady-state operation. The current profile must be optimized to obtain a normalized beta up to 3. The plasma configuration with high triangularity was adopted in order to get good MHD stability and high energy confinement. A compact divertor was designed in order to get the large plasma space.
