Community Research and Development Information Service - CORDIS

Abstract

The dynamical response of the soft X-ray emission profile to different external perturbations - gas feed, impurity injection, RF power, surface loop voltage - has been studied on the TCA tokamak and analysed using the same techniques. The frequency dependence of the response has been exploited to distinguish between the dominant transport processes. Remarkably similar phase response profiles were obtained with the different stimuli; they show a link with the sawtooth activity. The model which explains these experimental observations most plausibly requires diffusive transport with the diffusive coefficient locally modulated by the perturbation.

Additional information

Authors: MORET J-M, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Lausanne (CH);DUDOK DE WIT T, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Lausanne (CH);JOYE B, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Lausanne (CH);LISTER J B, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Lausanne (CH)
Bibliographic Reference: Report: LRP 451/92 EN (1992)
Availability: Available from Confédération Suisse, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, 21 avenue des Bains, 1007 Lausanne (CH)
Record Number: 199210403 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: en
Available languages: en