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

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.

Authors:
; ;  [1];  [2]
  1. Tech-X Corporation, 5621 Arapahoe Ave., Boulder, Colorado 80303 (United States)
  2. General Atomics, PO Box 85608, San Diego, California 92186–5608 (United States)
Publication Date:
OSTI Identifier:
22598931
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CALCULATION METHODS; CLOSURES; COMPARATIVE EVALUATIONS; INSTABILITY; MAGNETOHYDRODYNAMICS; N CODES; NIMROD; NUMERICAL ANALYSIS; PLASMA; STABILIZATION; TOKAMAK DEVICES

Citation Formats

King, J. R., Pankin, A. Y., Kruger, S. E., and Snyder, P. B. The impact of collisionality, FLR, and parallel closure effects on instabilities in the tokamak pedestal: Numerical studies with the NIMROD code. United States: N. p., 2016. Web. doi:10.1063/1.4954302.
King, J. R., Pankin, A. Y., Kruger, S. E., & Snyder, P. B. The impact of collisionality, FLR, and parallel closure effects on instabilities in the tokamak pedestal: Numerical studies with the NIMROD code. United States. doi:10.1063/1.4954302.
King, J. R., Pankin, A. Y., Kruger, S. E., and Snyder, P. B. Wed . "The impact of collisionality, FLR, and parallel closure effects on instabilities in the tokamak pedestal: Numerical studies with the NIMROD code". United States. doi:10.1063/1.4954302.
@article{osti_22598931,
title = {The impact of collisionality, FLR, and parallel closure effects on instabilities in the tokamak pedestal: Numerical studies with the NIMROD code},
author = {King, J. R. and Pankin, A. Y. and Kruger, S. E. and Snyder, P. B.},
abstractNote = {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.},
doi = {10.1063/1.4954302},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 6,
volume = 23,
place = {United States},
year = {2016},
month = {6}
}