Influence of the static dynamic ergodic divertor on edge turbulence properties in TEXTOR

Y. Xu, R. R. Weynants, S. Jachmich, M. Van Schoor, M. Vergote, P. Peleman, M. W. Jakubowski, M. Mitri, D. Reiser, B. Unterberg, K. H. Finken

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Résumé

Systematic measurements on the edge turbulence and turbulent transport have been made by Langmuir probe arrays on TEXTOR under various static Dynamic Ergodic Divertor (DED) configurations. Common features are observed. With the DED, in the ergodic zone the local turbulent flux reverses sign from radially outwards to inwards. The turbulence properties are profoundly modified by energy redistribution in frequency spectra and suppression of large scale eddies. The fluctuation poloidal phase velocity changes direction from electron to ion diamagnetic drift, consistent with the observed reversal of the Er×B flow. In the laminar region, the turbulence is found to react to an observed reduced flow shear.

langue originaleAnglais
Numéro d'article165003
journalPhysical Review Letters
Volume97
Numéro de publication16
Les DOIs
étatPublié - 2006

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