Journal Article

FZJ-2021-05652

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Influence of the X-point location on edge plasma transport in the J-TEXT tokamak with a high-field-side single-null divertor

WANG, H. ; LIANG, Y. (Corresponding author)FZJ* ; Xu, S.FZJ* ; JIANG, Z. ; FENG, Y. ; KNIEPS, A.FZJ* ; DREWS, P.FZJ* ; YANG, J.FZJ* ; XU, X. ; LONG, T. ; JIAO, S. ; ZHANG, X. ; HAO, Z. ; YANG, Q. ; CHEN, Z. ; CHEN, Z. ; WANG, N. ; YANG, Z. ; ZHANG, X. ; DING, Y. ; PAN, Y.

2021
IOP Bristol

This record in other databases:  

Please use a persistent id in citations: http://hdl.handle.net/2128/30173  doi:10.1088/2058-6272/ac224a

Abstract: High-density experiments in the high-field-side mid-plane single-null divertor configuration have been performed for the first time on J-TEXT. The experiments show an increase in the highest central channel line-averaged density from $2.73\,\times \,{10}^{19}\,{{\rm{m}}}^{-3}$ to $6.49\,\times \,{10}^{19}\,{{\rm{m}}}^{-3}$, while the X-point moves away from the target by increasing the divertor coil current. The corresponding Greenwald fraction rises from 0.50 to 0.79. For the impurity transport, the density normalized radiation intensity (absolute extreme ultraviolet and soft x-ray) of the central channel density decreased significantly (>50%) with an increase in the plasma density. To better understand the underlying physics mechanisms, the 3D edge Monte Carlo code coupled with EIRENE (EMC3- EIRENE) has been implemented for the first time on J-TEXT. The simulation results show good agreement with the experimental findings. As the X-point moves away from the target, the divertor power decay length drops and the scrape-off layer impurity screening effect is enhanced.

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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 2021

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

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