Journal Article

PreJuSER-44209

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Electrode biasing on TEXTOR: a tool for fundamental physics studies

Weynants, R. R. ; Jachmich, S. ; van Schoor, M. ; TEXTOR, T.FZJ*

2005
American Nuclear Society La Grange Park, Ill.

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Please use a persistent id in citations: http://hdl.handle.net/2128/2744

Abstract: The application in TEXTOR of an externally controlled radial electric field E-r imposed by means of an electrode, has allowed to ascertain many aspects of the physics of the creation of E-r and of its effect on radial transport. Radial conductivity was shown to depend on parallel viscosity with the latter's nonlinear response to E-r providing the basic ingredient for E-r bifurcation, typical for L- to H-mode transitions. Simultaneous time and space resolved measurements of E-r and of the plasma flows in the edge by means of a newly developed inclined Mach probe have allowed to further substantiate the role of parallel viscosity and of neutral collisions in the damping of rotation. The causal role of grad E-r in bringing about the transport changes has been proven by showing that the field shear is spatially correlated with and temporally leads the density gradient, as well as by comparison with theoretical modeling.

Keyword(s): J ; radial electric field (auto) ; plasma transport (auto) ; electrode biasing (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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