Bochum 2015 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 16: Poster Session - Helmholtz Graduate School for Plasma Physics

P 16.14: Poster

Dienstag, 3. März 2015, 16:30–18:30, Foyer Audimax

Non-linear simulations of ELMs in ASDEX Upgrade including diamagnetic drift effects — •Alexander Lessig1, Matthias Hoelzl1, Isabel Krebs1, Emmanuel Franck1, Sibylle Guenter1, Francois Orain2, Jorge Morales2, Marina Becoulet2, and Guido Huysmans31Max-Planck-Institut für Plasmaphysik, Boltzmannstrasse 2, 85748 Garching, Germany — 2CEA-IRFM, Cadarache, 13108 Saint-Paul-Lez-Durance, France — 3ITER Organization, 13067 Saint-Paul-Lez-Durance, France

Large edge localized modes (ELMs) are a severe concern for ITER due to high transient heat loads on divertor targets and wall structures. Using the non-linear MHD code JOREK, we have performed ELM simulations for ASDEX Upgrade (AUG) including diamagnetic drift effects. The influence of diamagnetic terms onto the evolution of the toroidal mode spectrum for different AUG equilibria and the non-linear interaction of the toroidal harmonics are investigated. In particular, we confirm the diamagnetic stabilization of high mode numbers and present new features of a previously introduced quadratic mode coupling model for the early non-linear evolution of the mode structure. Preliminary comparisons of full ELM crashes with experimental observations are shown aiming at code validation and the understanding of different ELM types. Work is ongoing to include toroidal and neoclassical poloidal rotation in our simulations.

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