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  • The effect of the diamagnetic drift on the boundary conditions in tokamak scrape-off layers and the distribution of plasma fluxes near the target


The standard model for the two dimensional simulation of the scrape-off layer (SOL) in the divertor is based on the equations for anomalous cross-field particle and energy transport and classical parallel transport. This paper demonstrates that the diamagnetic fluxes in the whole plasma can be represented by the curl of a vector and are, therefore, self-terminating. A detailed analysis is made of the distribution of plasma pressure and fluxes at the boundary between the plasma and the surface, encompassing the magnetic presheath and Debye sheath layers. Kinetic analysis of the distribution of the fluxes near the target also reveals an additional Epsilon x Beta drift in the radial direction.

Additional information

Authors: CHANKIN A V, JET Joint Undertaking, Abingdon, Oxon. (GB);STANGEBY P C, University of Toronto, Institute for Aerospace Studies, Ontario (CA)
Bibliographic Reference: Report: JET-P(94)18 EN (1994) 19 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
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