Numerical scalings of the decay lengths in the scrape-off layer

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Abstract

Numerical simulations of L-mode turbulence in the scrape-off layer (SOL) are used to construct power scaling laws for the characteristic decay lengths of the temperature, density and heat flux at the outer mid-plane. Most of the results obtained are in qualitative agreement with the experimental observations despite the known limitation of the model. Quantitative agreement is also obtained for some exponents. In particular, an almost linear inverse dependence of the heat flux decay length with the plasma current is recovered. The relative simplicity of the theoretical model used allows one to gain insight into the mechanisms determining the width of the SOL.
Original languageEnglish
JournalPlasma Physics and Controlled Fusion
Volume55
Issue number7
Pages (from-to)074010
ISSN0741-3335
DOIs
Publication statusPublished - 2013

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