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Abstract

Ergodic divertor experiments in Tore Supra have shown a large number of resonant effects. This paper presents these features in configurations where the plasma is leaning either on the outboard limiter, or on the inner bumper limiter. Whereas the plasma bulk does not suffer from any deleterious effect, ergodisation of the boundary layer (about 20% of the minor radius) leads to changes, which are analysed in this paper. In the outboard configuration, recycling seems to be more widespread. In the inboard configuration, when the E.D. is turned on, recycling diminishes while the average density increases. The edge is particularly affected, whereas confinement is preserved in the bulk. The electronic temperature and the density gradient decrease in the ergodic region. The impurity content of the discharge is affected. Radiated power in this zone is increased by a large factor, while remaining the same at the plasma centre.

Additional information

Authors: GROSMAN A ET AL., CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Paper presented: 9th International Conference on Plasma Surface Interactions, Bournemouth (GB), May 21-25, 1990
Availability: Available from (1) as Paper EN 35527 ORA
Record Number: 199011222 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en