Journal Article

PreJuSER-52752

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Forced magnetic reconnection and field penetration of an externally applied rotating helical magnetic field in the TEXTOR tokamak

Kikuchi, Y.FZJ* ; de Bock, M. F. M. ; Finken, K. H.FZJ* ; Jakubowski, M. W.FZJ* ; Jaspers, R. ; Koslowski, H. R.FZJ* ; Krämer-Flecken, A.FZJ* ; Lehnen, M.FZJ* ; Liang, Y.FZJ* ; Matsunaga, G. ; Reiser, D.FZJ* ; Wolf, R. C.FZJ*

2006
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/1915  doi:10.1103/PhysRevLett.97.085003

Abstract: The magnetic field penetration process into a magnetized plasma is of basic interest both for plasma physics and astrophysics. In this context special measurements on the field penetration and field amplification are performed by a Hall probe on the dynamic ergodic divertor (DED) on the TEXTOR tokamak and the data are interpreted by a two-fluid plasma model. It is observed that the growth of the forced magnetic reconnection by the rotating DED field is accompanied by a change of the plasma fluid rotation. The differential rotation frequency between the DED field and the plasma plays an important role in the process of the excitation of tearing modes. The momentum input from the rotating DED field to the plasma is interpreted by both a ponderomotive force at the rational surface and a radial electric field modified by an edge ergodization.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institut für Plasmaphysik (IPP)

Research Program(s):

1. Fusion (P13)

Appears in the scientific report 2006
Notes: This version is available at the following Publisher URL: http://prl.aps.org

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