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Abstract

A marfe is a toroidally symmetric band of enhanced radiation sometimes observed in tokamaks. It is strongly localized near the plasma edge, typically has a poloidal width of about 30 degrees, and always occurs on the inboard side. They were first reported on Alcator C. Marfes have been attributed to a radiative thermal instability. A local decrease in temperature leads to a local increase in radiation cooling. This destabilizing effect is opposed by parallel thermal conduction. Instability can occur only near the plasma edge where parallel thermal conductivity is low. A criterion for the onset of such an instability will be derived and its saturated state studied. Theoretical predictions are consistent with experiment.

Additional information

Authors: STRINGER T E JET JOINT UNDERTAKING, ABINGDON (UK), JET JOINT UNDERTAKING, ABINGDON (UK)
Bibliographic Reference: 12TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA PHYSICS, BUDAPEST (HUNGARY), SEPT. 2-6, 1985 PP. 5- 8 WRITE TO THE PUBLIC"TIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK) MENTIONING REPORT JET-P(85)10, 1985
Record Number: 1989124057900 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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