Journal Article

FZJ-2023-01922

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Modeling of plasma beta effects on the island divertor transport in the standard configuration of W7-X

Xu, S. (Corresponding author)FZJ* ; Liang, Y. (Corresponding author)FZJ* ; Knieps, A.FZJ* ; Zhou, S. ; Feng, Y. ; Reiter, D.FZJ* ; Suzuki, Y. ; Jia, M. ; Geiger, J. ; Reimold, F. ; König, R. ; Dinklage, A. ; Harting, D.FZJ* ; Luo, Y.FZJ* ; Drews, P.FZJ* ; Jakubowski, M. ; Gao, Y. ; Pasch, E. ; Pandey, A.FZJ* ; Langenberg, A. ; Pablant, N. ; Brezinsek, S.FZJ* ; Wang, E.FZJ* ; Liu, S. ; Xiang, H. M.FZJ* ; Neubauer, O.FZJ* ; Huang, J. ; Cai, J. ; Yang, J. ; Liu, J. ; Liao, L. ; Gao, Y. C.

2023
IAEA Vienna

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Please use a persistent id in citations: http://hdl.handle.net/2128/34345  doi:10.1088/1741-4326/acc7b8

Abstract: The influence of plasma beta effects on the edge plasma transport in the Wendelstein 7-X standard configuration is studied systematically by using EMC3-EIRENE combined with a 3D equilibrium code named HINT. The magnetic topology changes induced by plasma beta effects are significantly reflected in plasma transport behaviors and heat flux patterns on divertor targets. After validating the modeling strategy by comparisons with experimental data, the extended simulations for high performance plasmas show that the threshold separatrix density for accessing the power detachment is reduced in higher beta plasmas. Compared with the vacuum field case, the impurity radiation distributions with finite beta effects are modified in the magnetic island region. The divertor heat flux is distributed more evenly along the toroidal direction on the strike line at the vertical target. The strike line on the horizontal target moves towards the pumping gap with an increase in the plasma beta. In addition, the different pressure profiles with the same central beta also result in a modified heat flux pattern on the divertor targets.

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Contributing Institute(s):

1. Plasmaphysik (IEK-4)

Research Program(s):

1. 134 - Plasma-Wand-Wechselwirkung (POF4-134) (POF4-134)

Appears in the scientific report 2023

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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