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Abstract

The level of density fluctuations is shown to decrease during ergodic divertor operation in Tore Supra. This decrease of the turbulence is correlated with the onset of a temperature pedestal and a local improvement of the confinement. This pedestal is located close to the electric shear layer, within a narrow region between the plasma core and the ergodic layer. The onset of such a pedestal explains why the central electron temperature is not changed when the ergodic divertor is switched on, in spite of an ergodic zone where the temperature is low.

Additional information

Authors: PAYAN J ET AL., CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);TRUC A ET AL., PMI-CNRS, Ecole Polytechnique, Palaiseau (FR)
Bibliographic Reference: Report: EUR-CEA-FC-1534 EN (1994) 30 pp.
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199510225 / Last updated on: 1995-02-21
Category: PUBLICATION
Original language: en
Available languages: en