Journal
PHYSICS OF PLASMAS
Volume 22, Issue 6, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4922079
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Funding
- U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences [DE-SC0003913, DE-SC0008801, DE-FC02-04ER54698]
- U.S. Department of Energy (DOE) [DE-SC0008801, DE-SC0003913] Funding Source: U.S. Department of Energy (DOE)
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The general geometry of the experimental tokamak magnetic equilibrium is implemented in the global gyrokinetic simulation code GEM. Compared to the general geometry, the well used Miller parameterization of the magnetic equilibrium is a good approximation in the core region and up to the top of the pedestal. Linear simulations indicate that results with the two geometries agree for r/a <= 0.9. However, in the edge region, the instabilities are sensitive to the magnetic equilibrium in both the L-mode and the H-mode plasmas. A small variation of the plasma shaping parameters leads to large changes to the edge instability. (C) 2015 AIP Publishing LLC.
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