Density Effects on Tokamak Edge Turbulence and Transport with Magnetic X-points
Description:
Results are presented from the 3D electromagnetic turbulence code BOUT, the 2D transport code UEDGE, and theoretical analysis of boundary turbulence and transport in a real divertor-plasma geometry and its relationship to the density limit. Key results include: (1) a transition of the boundary turbulence from resistive X-point to resistive-ballooning as a critical plasma density is exceeded; (2) formation of an X-point MARFE in 2D UEDGE transport simulations for increasing outboard radial trans…
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Date:
October 12, 2004
Creator:
Xu, X. Q.; Cohen, R. H.; Nevins, W. M.; Rognlien, T. D.; Ryutov, D. D.; Umansky, M. V. et al.
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