Journal Article

PreJuSER-53905

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Improved Confinement due to Open Ergodic Field Lines Imposed by the Dynamic Ergodic Divertor in TEXTOR

Finken, K. H.FZJ* ; Abdullaev, S. S.FZJ* ; Jakubowski, M. W. ; de Bock, M. F. M. ; Bozhenkov, S. A. ; Busch, C.FZJ* ; von Hellermann, M. ; Jaspers, R. ; Kikuchi, Y. ; Krämer-Flecken, A.FZJ* ; Lehnen, M.FZJ* ; Schega, D.FZJ* ; Schmitz, O.FZJ* ; Spatschek, K. H. ; Unterberg, B.FZJ* ; Wingen, A. ; Wolf, R. C.FZJ* ; Zimmermann, O.FZJ*

2007
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/7659  doi:10.1103/PhysRevLett.98.065001

Abstract: The ergodization of the magnetic field lines imposed by the dynamic ergodic diverter (DED) in TEXTOR can lead both to confinement improvement and to confinement deterioration. The cases of substantial improvement are in resonant ways related to particular conditions in which magnetic flux tubes starting at the X points of induced islands are connected with the wall. This opening process is connected with a characteristic modification of the heat deposition pattern at the divertor target plate and leads to a substantial increase and steepening of the core plasma density and pressure. The improvement is tentatively attributed to a modification of the electric potential in the plasma carried by the open field lines. The confinement improvement bases on a spontaneous density built up due to the application of the DED and is primarily a particle confinement improvement.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Plasmaphysik (IEF-4)

Research Program(s):

1. Fusion (P13)

Appears in the scientific report 2007

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Database coverage:
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