MHD Equilibrium Reconstruction in the DIII-D Tokamak

Physics elements and advances crucial for the development of axisymmetric magnetohydrodynamic equilibrium reconstruction to support plasma operation and data analysis in the DIII-D tokamak are reviewed. A response function formalism and a Picard linearization scheme are used to efficiently combine t...

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Bibliographic Details
Published inFusion science and technology Vol. 48; no. 2; pp. 968 - 977
Main Authors Lao, L. L., John, H. E. St, Peng, Q., Ferron, J. R., Strait, E. J., Taylor, T. S., Meyer, W. H., Zhang, C., You, K. I.
Format Journal Article
LanguageEnglish
Published United States Taylor & Francis 01.10.2005
Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALGORITHMS
AXIAL SYMMETRY
BOUNDARY CONDITIONS
DATA ANALYSIS
DOUBLET-3 DEVICE
ELECTRIC CURRENTS
EQUILIBRIUM PLASMA
H-MODE PLASMA CONFINEMENT
MHD EQUILIBRIUM
OPERATION
RESPONSE FUNCTIONS
ROTATION
TOPOLOGY
VECTORS
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Summary:Physics elements and advances crucial for the development of axisymmetric magnetohydrodynamic equilibrium reconstruction to support plasma operation and data analysis in the DIII-D tokamak are reviewed. A response function formalism and a Picard linearization scheme are used to efficiently combine the equilibrium and the fitting iterations and search for the optimum solution vector. Algorithms to incorporate internal current and pressure profile measurements, topological constraints, and toroidal plasma rotation into the equilibrium reconstruction are described. Choice of basis functions and boundary conditions essential for accurate reconstruction of L- and H-mode equilibrium plasma boundary and current and pressure profiles is discussed. The computational structure used to efficiently integrate these elements into the equilibrium reconstruction code EFIT is summarized.
ISSN:1536-1055
1943-7641
DOI:10.13182/FST48-968