Scaling for the SOL/separatrix χ ⊥ following from the heuristic drift model for the power scrape-off layer width

Huber, A.; Chankin, A. V.

doi:10.1088/1361-6587/aa6ab9

Journal Article

FZJ-2017-03420

Scaling for the SOL/separatrix χ ⊥ following from the heuristic drift model for the power scrape-off layer width

Huber, A. (Corresponding author)FZJ* ; Chankin, A. V.

2017
IOP Publ. Bristol

Plasma physics and controlled fusion 59(6), 064007 - (2017) [10.1088/1361-6587/aa6ab9]

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Please use a persistent id in citations: http://hdl.handle.net/2128/25407 doi:10.1088/1361-6587/aa6ab9

Abstract: A simple two-point representation of the tokamak scrape-off layer (SOL) in the conduction limited regime, based on the parallel and perpendicular energy balance equations in combination with the heat flux width predicted by a heuristic drift-based model, was used to derive a scaling for the cross-field thermal diffusivity ${\chi }_{\perp }.$ For fixed plasma shape and neglecting weak power dependence indexes 1/8, the scaling ${\chi }_{\perp }\propto {P}_{{\rm{S}}{\rm{O}}{\rm{L}}}/(n{B}_{\theta }{R}^{2})$ is derived.

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