PLASMA-FACING COMPONENT DESIGN FOR STEADY-STATE TOKAMAK SST-1

A superconducting steady state tokamak is being designed to address so me of the physics and technological issues of steady state operation, Circular plasma operation with poloidal limiter and elongated plasma o peration with poloidal divertor are planned for a maximum steady state input power of 0.2 MW and 1 MW, respectively. The conceptual design o f various plasma facing components is discussed. The poloidal limiter and divertor are actively cooled so as to keep the surface temperature of the plasma facing components less than 1000 degrees C. In the pres ent design the steady state heat removal capability is limited to a ma ximum of 1 MW/m(2) due to mechanical attachment scheme adopted for arm or tile mounting to the actively cooled substrate. The plasma facing c omponent surfaces have been profiled/shaped so that maximum steady sta te heat flux on the surface is less than or equal to 1 MW/m(2).