SMuK 2023 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 10: Magnetic Confinement III/HEPP V
P 10.5: Vortrag
Mittwoch, 22. März 2023, 12:45–13:10, CHE/0091
Gyrokinetic investigation of linear and non-linear excitation of energetic particle driven instabilities in ASDEX Upgrade — •Brando Rettino1, Thomas Hayward-Schneider1, Alessandro Biancalani2,1, Alberto Bottino1, Philipp Lauber1, Ilija Chavdarovski3, Markus Weiland1, Francesco Vannini1, and Frank Jenko1 — 1Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany — 2Léonard de Vinci Pole Universitaire, Research Center, 92916 Paris la Défense, France — 3Korea Institute of Fusion Energy, 34133 Daejeon, South Korea
Excitation of Alfvén Waves (AW) and Geodesic Acoustic Modes (GAM) by energetic particles (EPs) is an important topic of study for the physics of fusion reactors. In tokamaks, ions are injected with high energies to heat the plasma. These energetic particles are very weakly collisional and exist far from thermal equilibrium. We examine the effects of experimental-like anisotropic in velocity distribution functions of EPs on the excitation of such instabilities with the gyrokinetic particle-in-cell code ORB5. The growth rate of GAMs is found to be sensitively dependent on the phase-space shape of the distribution function as well as on the non-linear wave-wave coupling with AWs.