The new control scheme for the JET plasma position and current control system

Abstract

The new setup for the Plasma Position and Current Control (PPCC) to be implemented in the next JET operational campaign is described. A decoupling control scheme is used because of the strong coupling between the coils introduced by the new divertor coils and magnetic configuration. A general discussion of the method applied with results of simulations is presented. Effects of modelling errors and operational limits are discussed.