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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 Biancalani^2,1, 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.