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Published on: November 8, 2012
Spatial and temporal analysis of DIII-D 3D magnetic diagnostic data
E J Strait1, J D King1, J M Hanson2
1General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA.
Abstract:
An extensive set of magnetic diagnostics in DIII-D is aimed at measuring non-axisymmetric "3D" features of tokamak plasmas, with typical amplitudes ∼10-3 to 10-5 of the total magnetic field. We describe hardware and software techniques used at DIII-D to condition the individual signals and analysis to estimate the spatial structure from an ensemble of discrete measurements. Applications of the analysis include detection of non-rotating MHD instabilities, plasma control, and validation of MHD stability and 3D equilibrium models.

