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FP7

Numerical investigations of edge plasma flows in the Tore Supra tokamak

Funded under: FP7-EURATOM

Abstract

The 2D boundary layer code TECXY has been used to simulate edge plasma parameters in the Tore Supra tokamak. Experimental situations have been analysed when the plasma contact point is shifted to different poloidal positions (limiter at bottom, top, outboard and inboard midplane) as well as the edge plasma conditions during lower hybrid RF power scan experiments. With the results of the calculations it was possible to reproduce experimentally observed changes to the flow pattern in the scrape-off-layer (SOL) for different plasma positions. These changes can be associated with the dependence of the radial electric field and the corresponding E x B drift velocity on the limiter position as well as to the poloidal asymmetries of the input particle flux. However, the code results with 'standard radial transport' did not show the large changes to the SOL widths as observed in the experiment. In order to reproduce in the calculations the observed differences in the SOL width, it was necessary to assume strong convective (or diffusive) radial plasma flow localized at the outboard midplane.

Additional information

Authors: ZAGÓRSKI R, Institute of Plasma Physics and Laser Microfusion, EURATOM Association, Warsaw (PL);GUNN J P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);NANOBASHVILI I, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An article published in: Plasma Physics and Controlled Fusion 49 (2007), pp. S97-S108
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/doi:10.1088/0741-3335/49/7/S07
Record Number: 200719390 / Last updated on: 2007-09-11
Category: PUBLICATION
Original language: en
Available languages: en