Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
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Electron Parallel Heat Transport in the Scrape-off Layer Using a Particle-in-Cell Code
Aaron FROESETomonori TAKIZUKAMasatoshi YAGI
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2010 Volume 5 Pages S1017

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Abstract

Electron heat transport parallel to the magnetic field in the scrape-off layer plasma is investigated with the use of the particle-in-cell code PARASOL. Coulomb collisions are simulated correctly by a binary collision model. The heat flux is lost by radiation cooling, in addition to convection/conduction to the divertor plates. It is confirmed for the collisional case that the conductive heat flux is given by the Spitzer-Härm expression. For the long mean free path case, the conductive heat flux is limited to a factor αe of the free streaming value. It is found that αe is small (∼0.1 of the sheath-limited value) for the low radiation condition, but becomes large (∼1.0) for the high radiation condition.

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© 2010 by The Japan Society of Plasma Science and Nuclear Fusion Research
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