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Abstract

We present detailed measurements of the radiated power loss from the TCA tokamak using a 16-channel radiation bolometer array. The plasma conditions have been varied over a wide range up to the high density disruption limit, at several magnetic fields and plasma currents. We demonstrate that the fractional radiated power is a tight and decreasing function of the average electron drift speed, and is independent of the toroidal magnetic field for given conditions. The occurrence of disruptions does not seem to be particularly correlated with the total fractional radiated power, but more with the radiated power fraction on axis. The injection of light impurities shows clearly that there is no simple universal "law" which predicts the disruption limit in TCA in terms of the measurable radiated power loss. No evidence of any disruption "precursor" behaviour has been seen in the bolometer data to date.

Additional information

Authors: JOYE B, CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (SWITZERLAND);UNIVERSITY OF FRIBOURG (SWITZERLAND);LISTER J B, CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (SWITZERLAND);UNIVERSITY OF FRIBOURG (SWITZERLAND);MORET J M, CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (SWITZERLAND);UNIVERSITY OF FRIBOURG (SWITZERLAND);NOWAK S CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (SWITZERLAND), CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (SWITZERLAND);UNIVERSITY OF FRIBOURG (SWITZERLAND);UNIVERSITY OF FRIBOURG (SWITZERLAND), CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (SWITZERLAND);UNIVERSITY OF FRIBOURG (SWITZERLAND)
Bibliographic Reference: WRITE TO CONF.SUISSE, CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE, 21 AVENUE DES BAINS + CH-1007 LAUSANNE (SWITZERLAND), MENTIONING REPORT LRP 282/85, 1985
Record Number: 1989124125900 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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