Journal Article

PreJuSER-44186

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Background and initial experiments with the dynamic ergodic divertor on TEXTOR

Finken, K. H.FZJ* ; Abdullaev, S. S.FZJ* ; de Bock, M. F. M. ; Giesen, B.FZJ* ; von Hellermann, M. ; Hogeweij, M. D. ; Jakubowski, M. W. ; Jaspers, R. ; Kobayashi, M. ; Koslowski, H. R.FZJ* ; Lehnen, M.FZJ* ; Matsunaga, G. ; Neubauer, O.FZJ* ; Pospieszczyk, A.FZJ* ; Samm, U.FZJ* ; Schweer, B.FZJ* ; Wolf, R.FZJ*

2005
American Nuclear Society La Grange Park, Ill.

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Please use a persistent id in citations: http://hdl.handle.net/2128/2736

Abstract: Recently, the Dynamic Ergodic Divertor (DED) with 18 helically wound coils at the high field side has been installed on TEXTOR. The DED allows static and dynamic operation up to 10 kHz. The specific features of ergodization and the open laminar zone are discussed. The dynamic feature leads to induced electrical currents and to a force transfer from the external coils to the plasma. The structures due to the DED near field are described, which result in a stripe like pattern seen both in the light of recycling particles (H, impurities) and in the heat deposition pattern. The ergodization leads either to an enhanced plasma rotation-probably due to edge electric fields-or to a reduction of the central rotation if a tearing mode is excited; the result depends on the sense of DED rotation.

Keyword(s): J ; ergodic structures (auto) ; power distribution (auto) ; induced tearing modes (auto)

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institut für Plasmaphysik (IPP)

Research Program(s):

1. Kernfusion und Plasmaforschung (E05)

Appears in the scientific report 2005

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Database coverage:

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