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P: Fachverband Plasmaphysik
P 21: Helmholtz Graduate School 5
P 21.2: Vortrag
Donnerstag, 12. März 2020, 14:30–14:55, b305
MHD simulations of ELM cycles in ASDEX Upgrade — •Andres Cathey Cevallos1, Matthias Hoelzl1, Michael Dunne1, Guido Huijsmanns2,3, and Sibylle Guenter1 — 1Max-Planck-Institut für Plasmaphysik, Garching, Germany — 2CEA, IRFM, Saint-Paul-Lez-Durance, France — 3Eindhoven University of Technology, Eindhoven, The Netherlands
Edge Localized Modes (ELMs) in tokamaks cause severe concern for future devices like ITER. Large ELMs lead to an expulsion of hot plasma from the edge of the confined region to the tokamak plasma facing components in 0.1–1 milliseconds repetitively every 10–100 milliseconds.
Simulations of single ELM crashes with the non-linear 3D magnetohydrodynamic (MHD) code JOREK [GTA Huysmans and O Czarny, NF 47 7 2007] have been validated qualitatively and quantitatively showing good agreement against experimentally observed ELM crashes. Such simulations start with unstable plasma equilibria. To become predictive the entire ELM cycle needs to be simulated. Here, we present simulations of ELM cycles in ASDEX Upgrade and thorough comparisons against experimental measurements. The difficulties related to simulating ELM cycles, how they were overcome with JOREK, and further steps necessary for a better and more comprehensive understanding of ELM dynamics will be discussed at length.