Role of thermal instabilities and anomalous transport in threshold of detachment and multifacetted asymmetric radiation from the edge (MARFE)
Authors:
- 1 May 2005
- journal article
- conference paper
- Published by AIP Publishing in Physics of Plasmas
- Vol. 12 (5) , 052510
Abstract
A model for the plasma edge in limiter tokamaks is elaborated, which permits us to investigate the synergy of impurity radiation, particle recycling, and edge turbulence phenomena in the formation of large-scale structures, in particular, of multifacetted asymmetric radiation from the edge. The model includes a description for the anomalous transport of charged particles induced by drift microinstabilities most typical under edge conditions. Computations show that the pattern of structures, developing when a critical plasma density is approached, is essentially determined by the poloidal inhomogeneities introduced from the Shafranov shift of magnetic surfaces and from the ballooning character of edge turbulence.Keywords
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