Göttingen 2025 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 3: Magnetic Confinment Fusion/HEPP II
P 3.2: Vortrag
Montag, 31. März 2025, 16:45–17:10, ZHG102
Hybrid kinetic-MHD and gyrokinetic simulations of the fishbone instability with JOREK and ORB5 — •Felix Antlitz1, Xin Wang1, Matthias Hoelzl1, Guido Huijsmans2,3, Philipp Lauber1, Thomas Hayward-Schneider1, and Alexey Mishchenko4 — 1Max Planck Institute for Plasma Physics, Garching b. M., Germany — 2CEA, Saint-Paul-Lez-durance, France — 3Eindhoven University of Technology, Eindhoven, Netherlands — 4Max Planck Institute for Plasma Physics, Greifswald, Germany
Energetic particles (EPs) will play a central role in future burning plasma experiments, as they can strongly interact with the bulk plasma and drive magnetohydrodynamic (MHD) instabilities. For instance, the so called fishbone instability is the result of an internal kink mode destabilized by EPs in tokamaks. In this contribution, we first describe numerical simulations using the nonlinear extended MHD code JOREK, whose kinetic module is used to include EPs with a particle-in-cell technique. JOREK uses a full-f formulation for the EPs and evolves the MHD equilibrium consistently in time. Second, results from simulations with the global electromagnetic gyrokinetic code ORB5 are presented. This uses a gyrokinetic (or drift-kinetic) description not only for the fast ions, but also for the thermal ions and electrons. The two codes are run in both the linear and nonlinear regimes and the effect of the differences between the two models implemented in the codes are discussed.
Keywords: magnetohydrodynamics; energetic particles; hybrid simulation; gyrokinetics