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Impact of spatially varying transport coefficients in EMC3-Eirene simulations of W7-X and assessment of drifts

W7-X Team 1; Bold, David ; Reimold, Felix; Niemann, Holger; Gao, Yu; Jakubowski, Marcin; Killer, Carsten; Winters, Victoria R.; Maaziz, Nassim
1 Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM), Karlsruher Institut für Technologie (KIT)

Abstract:

Modelling the scrape-off layer of a stellarator is challenging due to the complex magnetic 3D geometry. The here presented study analyses simulations of the scrape-off layer (SOL) of the stellarator Wendelstein 7-X (W7-X) using spatially varying diffusion coefficients for the
magnetic standard configuration, extending our previous study (Bold et al 2022 Nucl. Fusion 62 106011). Comparing the EMC3-Eirene simulations with experimental observations, an inconsistency between the strike-line width (SLW) and the upstream parameters was observed.

Abstract (englisch):

Modelling the scrape-off layer of a stellarator is challenging due to the complex magnetic 3D geometry. The here presented study analyses simulations of the scrape-off layer (SOL) of the stellarator Wendelstein 7-X (W7-X) using spatially varying diffusion coefficients for the magnetic standard configuration, extending our previous study (Bold et al 2022 Nucl. Fusion 62 106011). Comparing the EMC3-Eirene simulations with experimental observations, an inconsistency between the strike-line width (SLW) and the upstream parameters was observed.
While to match the experimental SLW a particle diffusion coefficient D ≈ 0.2 m2 s−1 is needed, D ≈ 1 m2 s−1 is needed to get experimental separatrix temperatures of 50 eV at the given experimental heating power. ... mehr

Zugehörige Institution(en) am KIT Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 01.12.2024
Sprache Englisch
Identifikator ISSN: 0029-5515, 1741-4326
KITopen-ID: 1000176005
HGF-Programm 31.13.02 (POF IV, LK 01) Plasma Heating & Current Drive Systems
Erschienen in Nuclear Fusion
Verlag International Atomic Energy Agency (IAEA)
Band 64
Heft 12
Seiten 126055
Projektinformation EUROfusion (EU, EU 9. RP, 101052200)
Vorab online veröffentlicht am 25.10.2024
Schlagwörter Stellarator SOL modelling, Wendelstein 7-X (W7-X), assessment of drifts
Nachgewiesen in Web of Science
Scopus
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Verlagsausgabe §
DOI: 10.5445/IR/1000176005
Veröffentlicht am 06.11.2024
Originalveröffentlichung
DOI: 10.1088/1741-4326/ad845c
Scopus
Zitationen: 1
Dimensions
Zitationen: 2
Seitenaufrufe: 14
seit 06.11.2024
Downloads: 8
seit 14.11.2024
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