SMuK 2023 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
P: Fachverband Plasmaphysik
P 12: Poster II
P 12.30: Poster
Wednesday, March 22, 2023, 17:30–19:00, HSZ EG
Non-linear free boundary simulations of resonant magnetic perturbations in ASDEX Upgrade — •Verena Mitterauer1, Matthias Hoelzl1, Matthias Willensdorfer1, and ASDEX Upgrade Team2 — 1Max Planck Institute for Plasma Physics, Boltz- mannstrasse 2, 85748 Garching - Germany — 2See author list of U. Stroth et al. 2022 Nucl. Fusion 62 042006
Resonant Magnetic Perturbations (RMPs) are used routinely in tokamaks to control type-I Edge Localized Modes (ELMs). To improve the understanding of the effect of the helical magnetic field perturbations, numerical simulations of their penetration into the plasma are carried out using the free boundary non-linear MHD code JOREK-STARWALL. The use of free boundary conditions allows a self-consistent development of the plasma response within the complete computational domain.
Several aspects of RMP physics are investigated in simulations based on ASDEX Upgrade discharges with fully realistic plasma parameters and profiles. The comparison of the field line corrugation to experimental measurements shows that a valid representation of the plasma response is achieved. In subsequent simulations, the transition from ELM mitigation to suppression is shown, which allows the investigation of hypotheses concerning RMP-ELM suppression mechanisms, including the role of magnetic island positions relative to the pedestal, mode coupling and the impact of profile evolution on plasma stability. An extension of the fluid model to kinetic effects is on its way, which will allow the inclusion of the neoclassical toroidal viscosity.