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American Institute of Physics, Physics of Plasmas, 6(23), p. 062123, 2016

DOI: 10.1063/1.4954302

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The impact of collisionality, FLR, and parallel closure effects on instabilities in the tokamak pedestal: Numerical studies with the NIMROD code

Journal article published in 2016 by J. R. King ORCID, A. Y. Pankin, S. E. Kruger ORCID, P. B. Snyder
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This paper is available in a repository.

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Abstract

The extended-MHD NIMROD code [C. R. Sovinec and J. R. King, J. Comput. Phys. 229, 5803 (2010)] is verified against the ideal-MHD ELITE code [H. R. Wilson et al., Phys. Plasmas 9, 1277 (2002)] on a diverted tokamak discharge. When the NIMROD model complexity is increased incrementally, resistive and first-order finite-Larmour radius effects are destabilizing and stabilizing, respectively. The full result is compared to local analytic calculations which are found to overpredict both the resistive destabilization and drift stabilization in comparison to the NIMROD computations.