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Abstract

The paper addresses basic features of non-axisymmetric edge transport induced in tokamaks by local limiters or external magnetic perturbations and in low-shear stellarators by the presence of edge magnetic islands. 3D simulations and, if available for comparison, experimental results are presented and discussed for three devices, ITER during start-up operation, TEXTOR-DED and W7-AS, having edge topologies totally different from each other. The modeling is performed with the EMC3/EIRENE code, which treats self-consistently plasma, neutral and impurity transport in a general 3D scrape-off layer (SOL) with arbitrarily complex geometry of magnetic configuration and plasma-facing components. Shown are code predictions of the power load on the ITER start-up limiters as well as modeling results on the transport in the TEXTOR-DED stochastic edge and on the physics of stable detachment in W7-AS. Experimental observations confirming the code simulations are referenced for both TEXTOR-DED and W7-AS, a direct comparison between modeling and experimental results is shown for W7-AS.

Additional information

Authors: SARDEI F, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);FENG Y, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);KISSLINGER J, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);GRIGULL P, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);KOBAYASHI M, National Institute for Fusion Science, Toki (JP);HARTING D, Institut für Plasmaphysik, Forschungszentrum Jülich, Association EURATOM/FZJ, Trilateral Euregio Cluster, Jülich (DE);REITER D, Institut für Plasmaphysik, Forschungszentrum Jülich, Association EURATOM/FZJ, Trilateral Euregio Cluster, Jülich (DE);FEDERICI G, ITER Garching Joint Work Site, Garching (DE);LOARTE A, EFDA Close Support Unit, Garching (DE)
Bibliographic Reference: An article published in: Journal of Nuclear Materials (2007), online edition
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://www.sciencedirect.com/science/journal/00223115
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