Simulation studies of plasma shape identification and control in Korea Superconducting Tokamak Advanced Research

Simulation studies of plasma shape identification and shape control for the proposed Korea superconducting tokamak advanced research (KSTAR) are descr ibed. It is shown that the total number of magnetic measurements can be eff ectively reduced by considering the patterns of magnetic flux and fields? g enerated by plasma, along a prescribed measurement contour. The effect of e ddy currents on shape identification is investigated in dynamic simulations . The isoflux control scheme and a standard PID control law are adopted for the development of a model shape control system. It is shown that appropri ate weighting factors of poloidal field coils, incorporating the efficacy o f each coil to a shape control point, can significantly reduce the total fe edback power required for a shape control action. Finally, a share control simulation using calculated flux errors, which correspond to a more realist ic experimental situation, is presented. (C) 2001 Elsevier Science B.V. All rights reserved.