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Observation of Marfes in the Wendelstein 7-X stellarator with inboard limiters

Wenzel, Uwe; Biedermann, Christoph; Kocsis, Gábor; Szepesi, Tamás; Blackwell, Boyd; Klose, Sören; Knauer, Jens P; Krychowiak, M; Stephey, Laurie A; Schmitz, O.; Harris, Jeffrey H

Description

In the first operational campaign of the Wendelstein 7-X (W7-X) stellarator we observed Marfe-like radiation belts at the plasma edge. We describe and analyze the behaviour of these radiation belts, especially with respect to the high density inside the belt, with a set of suitable diagnostics. We present evidence suggesting that these Marfe-like radiation belts are triggered by a drop of the edge temperature below 30 eV. From this observation we draw the conclusion that the physical cause of...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
URI: http://hdl.handle.net/1885/205441
Source: Nuclear Fusion
DOI: 10.1088/1741-4326/aacb86

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