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Abstract

The hypotheses in connection with L-H transition are examined. The first is that the transition is triggered by the radial temperature gradient in a cold edge region exceeding a threshold. A number of observations relating to the occurrence of the H phase can be understood qualitatively from this hypothesis. A possible theoretical basis in terms of stabilization of drift waves is found. The second hypothesis is that transport at the edge region in the H phase is governed by neoclassical theory for electrons and ions. Exploration of the consequence on the temporal behavior of various signals indicates that while energy transport appears consistent with the predictions, particle transport appears much faster than neoclassical theory from the limited diagnostic information available.

Additional information

Authors: WONG S K MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY), MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY)
Bibliographic Reference: WRITE TO MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, 8046 GARCHING BEI MUENCHEN (GERMANY), MENTIONING REPORT IPP III/106, 1985
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