ANALOG FEEDBACK-CONTROL OF RFP PLASMA - IMPLEMENTATION AND FIRST RESULTS IN THE RFX EXPERIMENT

The design of an analog feedback control system of the plasma current and of the toroidal field at the first-wall is presented. Features and differences with respect to Tokamak devices are pointed out. Details on front-end electronics for feedback signal generation, regulator structure, signal transmission, logic units for feedback insertion and for protection are described. Finally, experimental results are presented and discussed.