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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.68: Poster
Donnerstag, 19. März 2026, 13:45–15:45, Redoutensaal
Impact of fishbone modes on core microturbulence with global gyrokinetic simulations — •Davide Brioschi1, Alessandro Di Siena1, Roberto Bilato1, Alberto Bottino1, Thomas Hayward-Schneider1, Philipp Lauber1, Alexey Mishchenko2, Emanuele Poli1, Alessandro Zocco2, and Frank Jenko1,3 — 1Max Planck Institute for Plasma Physics, 85748 Garching, Germany — 2Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany — 3Institute for Fusion Studies, The Univeristy of Texas at Austin, Austin, TX, USA
Fishbone instabilities (FBs) are a class of plasma modes which develop in tokamaks around rational surfaces. They are the energetic particle-driven branch of the n=m kink mode (with n and m toroidal and poloidal mode numbers). Numerical and experimental results show a possible relation between a suppression of (detrimental) turbulent transport inside tokamaks and the trigger of FBs. However, a clear causal relation between the destabilization of FBs and the core turbulent transport reduction has not been found yet. Therefore, it is clear the need for a description of the interaction of FBs with plasma turbulence. Our work aims to study such an interaction via gyrokinetic simulations with the codes GENE and ORB5, including both a FB mode and the ITG branches. These simulations are performed for an AUG discharge characterized by the presence of fishbone activity and plasma temperature peaking. Since the latter can be used as a proxy for core turbulence suppression, studying this case we can explore the physics of the interaction between FB instabilities and turbulence.
Keywords: Turbulence; Energetic particles; MHD; Multiscale; Gyrokinetic theory