Model-Based Design for Operational Plasma Shape Control in DIII-D
M. Walker, D. Humphreys, J.A. Leuer, B. Xiao, S.H. Hahn, E. Schuster, Y. Ou, M. Alsarheed, D. Gates, T. Casper. W. Meyer
Division of Plasma Physics (DPP) Annual Meeting of the American Physical Society (APS)
Orlando, Florida, November 12-16, 2007
Abstract
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Formerly, tokamak plasma control emphasized empirical tuning of simple
controllers during experimen- tal operations. Now, physics-based
tokamak plasma response models are maturing and increasingly used as
the basis for control design. This is essential for controller
development for devices under design or construction, and key to
maximizing the physics productivity of limited experimental time in
operating devices. We report on experience at DIII-D and other
tokamaks with shape control algorithms devel- oped using physics-based
models. We also describe a large and growing collection of Matlab
functions, collectively known as the Tokamak System (TokSys) Toolbox,
which standardizes much of the process of development and validation
of tokamak plasma response models. Such standardization enables rapid
model development, validation, and control design for operating and
planned devices. Application to control development for several devices
is described.