Toroidal Rotation Profile Control for the DIII-D Tokamak
W.Wehner, J. Barton and E. Schuster
American Control Conference
Chicago, Illinois, USA, July 1-3, 2015
Abstract
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A model-based control approach for the combined regulation of the plasma toroidal angular rotation profile and stored energy
for the DIII-D tokamak is proposed in this work. We consider, a first-principles-driven (FPD), control-oriented model of the
toroidal rotation profile evolution which incorporates scenario-specific models of the momentum sources. Available rotation
control mechanisms include the non-axisymmetric field coils, which provide rotation damping, and the neutral beam injectors (NBI).
The plasma stored energy is regulated by the total injected auxiliary power. Optimal state feedback control with integral action
is used to regulate the profile around a target while rejecting disturbances. The controller is designed to be robust against
uncertainties in the anomalous momentum diffusivity term.