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Effect of toroidal plasma currents on theWendelstein 7-X Scrape-Off Layer

Killer, C.; Gao, Yu; Perseo, Valeria; Rudischhauser, L.; Hammond, K; Buttenschön, Birger; Barbui, Tullio; Blackwell, Boyd; Brunner, Kai-Jakob; Drews, Philipp; Endler, Michael; Geiger, Joachim; Grulke, Olaf; Jakubowski, Marcin; Klose, Sören; Knauer, Jens P; Knieps, Alexander; König, Ralf; Li, Yongliang; Neuner, Ulrich; Niemann, Holger; Otte, Matthias; Schilling, Jonathan; Sitjes, A. Puig; Rahbarnia, Kian; Stange, Torsten

Description

The role of toroidal plasma currents for the island divertor scrape-off layer in the stellarator Wendelstein 7-X is investigated using reciprocating electric probes. Experiments show that small amounts (of a few kA) of plasma current are sufficient to significantly affect the scrape-off layer plasma conditions, whereas higher plasma currents above 10kA result in more drastic changes. This behavior is linked to the effect of the plasma current on the rotational transform profile, which can...[Show more]

CollectionsANU Research Publications
Date published: 2019-11-08
Type: Journal article
URI: http://hdl.handle.net/1885/205597
Source: Plasma Physics and Controlled Fusion
DOI: 10.1088/1361-6587/ab4f2d
Access Rights: Open Access

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