Darmstadt 2008 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 19: Plasma-Wand-Wechselwirkung III

P 19.1: Vortrag

Freitag, 14. März 2008, 12:00–12:15, 2E

Comparative 3D magnetic and edge transport modeling for TEXTOR-DED and DIII-D limiter configurations — •Heinke Frerichs¹, Oliver Schmitz¹, Derek Harting¹, Todd Evans², Ilon Joseph³, and Detlev Reiter¹ — ¹Institut für Energieforschung - Plasmaphysik, Forschungszentrum Jülich, Association EURATOM-FZJ, Trilateral Euregio Cluster — ²General Atomics, San Diego, California, USA — ³University of California, San Diego, CA 92093, USA

Resonant magnetic perturbations (RMP) are applied in some tokamaks (e.g., TEXTOR-DED, DIII-D, JET) to control particle and heat flux in the plasma edge layer. Furthermore, RMPs can be used to mitigate edge localized instabilities, so called ELMs. The application of RMPs induces an open chaotic system at the plasma edge, thus leading to a complex 3D magnetic field structure.

3D field line tracing and transport codes provide flexible tools to investigate the impact of RMPs on particle and heat transport, in particular for comparisons between experiments. We apply the 3D field line tracing code GOURDON and the 3D transport code EMC3-EIRENE to conditions in the DIII-D tokamak. Both codes have already been successfully applied and tested at the TEXTOR-DED tokamak. In this contribution a detailed analysis of the perturbed magnetic field geometry and its effect on plasma and neutral transport will be given for a DIII-D limiter scenario. An RMP induced poloidal modulation of plasma parameter is found, similar to both TEXTOR-DED simulations and experiments. The correlation between magnetic footprint and particle and heat depositon pattern at divertor targets is investigated.