Militello, F.5; Fundamenski, W.4; Naulin, Volker1; 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 Imperial College of Science, Technology and Medicine5 Culham Science Centre
Numerical simulations of L-mode plasma turbulence in the Scrape Off Layer of MAST are presented. Relevant features of the boundary plasma, such as the thickness of the density layer or the statistics of the fluctuations are related to the edge density and temperature, plasma current and parallel connection length. It is found that the density profile is weakly affected by the edge density, it broadens when the current or the temperature are decreased while the connection length has the opposite effect. The statistics of the turbulence is relatively insensitive to variations of all the edge parameters and show a certain degree of universality. Effective transport coefficients are calculated for several plasma conditions and display a strong nonlinear dependence on the parameters and on the radial variable. Finally, it is shown how the perpendicular particle fluxes in the Scrape Off Layer are related to the edge parameters.
Journal of Nuclear Materials, 2013, Vol 438, Issue Supplement
Main Research Area:
20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices, 2013