Simultaneous feedback control of plasma rotation and stored
energy on NSTX-U using Neoclassical Toroidal Viscosity and Neutral
Beam Injection Authors: I. R. Goumiri
Abstract:
A model-based feedback system is presented enabling the simultaneous
control of the stored energy through βn and the toroidal rotation
profile of the plasma in NSTX-U. Actuation is obtained using the
momentum from six injected neutral beams and the neoclassical
toroidal viscosity generated by applying three-dimensional magnetic
fields. Based on a model of the momentum diffusion and torque
balance, a feed-back controller is designed and tested in
closed-loop simulations using TRANSP in predictive mode. Promising
results for the ongoing experimental implementation of controllers
are obtained.
Submitted to: Physics of Plasmas
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Download PPPL-53624.9 MB (47 pp)
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