DEVELOPING INTEGRATED TOKAMAK DYNAMICS MODELS FOR NEXT-GENERATION MACHINE CONTROL

The modeling steps needed to create dynamically based automated contro l of tokamak plasmas are traced. This involves integrating models of c urrent/magnetic-flux dynamics; plasma transport; plasma geometry; and source terms, such as lower hybrid, fast wave, and pellet-fueling depo sition. Perturbative analysis of these models then yields the linear r esponse of the tokamak to changes in coil voltages, applied radio-freq uency power,; or pellet-firing frequency. Comparison of the linear res ponse models to nonlinear numerical calculations reveals that the plas ma position and shape modeling will require future refinements.