Militello, F.4; Naulin, V1; Nielsen, Anders Henry1
1 Department of Physics, Technical University of Denmark2 Plasma Physics and Fusion Energy, Department of Physics, Technical University of Denmark3 Culham Science Centre4 Culham Science Centre
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.
Plasma Physics and Controlled Fusion, 2013, Vol 55, Issue 7