All Physics Faculty Publications

Document Type

Article

Journal/Book Title/Conference

Physics of Plasmas

Volume

24

Issue

1

Publisher

American Institute of Physics Inc.

Publication Date

1-1-2017

DOI

10.1063/1.4972822

Abstract

Methods are described that extend fields from reconstructed equilibria to include scrape-off-layer current through extrapolated parametrized and experimental fits. The extrapolation includes both the effects of the toroidal-field and pressure gradients which produce scrape-off-layer current after recomputation of the Grad-Shafranov solution. To quantify the degree that inclusion of scrape-off-layer current modifies the equilibrium, the χ-squared goodness-of-fit parameter is calculated for cases with and without scrape-off-layer current. The change in χ-squared is found to be minor when scrape-off-layer current is included; however, flux surfaces are shifted by up to cm3 cm. The impact on edge modes of these scrape-off-layer modifications is also found to be small and the importance of these methods to nonlinear computation is discussed.

Comments

http://aip.scitation.org/doi/10.1063/1.4972822

Available for download on Monday, January 01, 2018

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