Erosion and impurity transport for the edge localized mode suppression window in KSTAR

A 3D analysis of plasma wall interactions and global impurity transport for the edge localized mode suppression window in KSTAR during H-Mode discharges has shown that carbon erosion at the divertor plates is a strong function of the resonant magnetic perturbation (n = 1) coil current and relative p...

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Bibliographic Details
Published in:Physics of plasmas 2024-08, Vol.31 (8)
Main Authors: Navarro, Marcos, Van Blarcum, Jonathan, Frerichs, Heinke, Romazanov, Juri, Kirschner, Andreas, Park, Jong-Kyu, Yang, Seong-Moo, Schmitz, Oliver
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Carbon
Charge deposition
Charge materials
Chemical impurities
Coils
Deuterium
Impurities
Interaction models
Perturbation
Plasma
Plasma equilibrium
Plasma interactions
Tokamaks
Transport properties
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Summary:A 3D analysis of plasma wall interactions and global impurity transport for the edge localized mode suppression window in KSTAR during H-Mode discharges has shown that carbon erosion at the divertor plates is a strong function of the resonant magnetic perturbation (n = 1) coil current and relative phasing. The Generalized Perturbation Equilibrium Code was used to determine a realistic initial perturbed plasma equilibrium, and EMC3-EIRENE was used to calculate the resulting scrape-off layer plasma used in this study as a fixed background for the ERO2.0 plasma–material interaction model. The resulting transport leads to deposition of impurities along the targets positioned at the high-field side of the device. An attempt at calculating the resulting effective charge state has demonstrated a similar dependence on the perturbation coil current and has been able to determine a window for the experimentally observed values of Zeff by including contributions of all ionized carbon charge states and deuterium.
ISSN:1070-664X
1089-7674
DOI:10.1063/5.0213155