Journal Article

FZJ-2020-03934

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Retarding field analyzer for the wendelstein 7-X boundary plasma

Henkel, M.FZJ* ; Li, Y. (Corresponding author)FZJ* ; Liang, Y.FZJ* ; Drews, P.FZJ* ; Knieps, A.FZJ* ; Killer, C. ; Nicolai, D.FZJ* ; Höschen, D.FZJ* ; Geiger, J. ; Xiao, C. ; Sandri, N.FZJ* ; Satheeswaran, G.FZJ* ; Liu, S. ; Grulke, O. ; Jakubowski, M. ; Brezinsek, S.FZJ* ; Otte, M. ; Neubauer, O.FZJ* ; Schweer, B.FZJ* ; Xu, G. ; Cai, J.

2020
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/25866  doi:10.1016/j.fusengdes.2020.111623

Abstract: A bi-directional multi-channel retarding field analyzer (RFA) probe has been successfully developed for the first time on the Wendelstein 7-X (W7-X) stellarator boundary plasma. Modifications to the RFA prototype hardware and its upgrade for the two W7-X island divertor campaigns are presented, including the electronics. In this paper the experiences and challenges operation and customizing an RFA at W7-X are discussed, as well as the data analysis using a maximum coefficient of determination method to obtain the ion temperature based on the measured modulated ion current. Edge ion temperature profiles have been measured in the standard and high iota configurations. Previous article in issue

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Contributing Institute(s):

1. Plasmaphysik (IEK-4)

Research Program(s):

1. 174 - Plasma-Wall-Interaction (POF3-174) (POF3-174)

Appears in the scientific report 2020

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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