SMuK 2021 – scientific programme

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P: Fachverband Plasmaphysik

P 5: Poster I

P 5.37: Poster

Tuesday, August 31, 2021, 14:00–16:00, P

Tackling turbulence in the plasma edge pedestal with a revised version of the GENE code — •L. A. Leppin, P. Crandall, T. Görler, F. Jenko, M. Cavedon, M. G. Dunne, and The ASDEX Upgrade Team — Max-Planck-Institut für Plasmaphysik, Boltzmannstraße 2, 85748 Garching b. München, Germany

A major challenge for future fusion power plants is the turbulent plasma dynamics on the microscale, which causes detrimental levels of outward transport of energy and particles. Many open questions on the properties of this dynamics remain in particular for the plasma edge pedestal, which is characterized by strong gradients of temperature and density, causing strong electromagentic fluctuations. An important approach to advance the understanding of turbulent plasma dynamics in the edge are high-fidelity simulations based on 5D gyrokinetic theory. Here we present a new modification of the well-established gyrokinetic, Eulerian, delta-f code GENE (genecode.org), which enables numerically stable global, electromagnetic simulations at high beta values. This new "f-version" utilizes a slightly different definition of the underlying distribution function. The new f-version is fully integrated into the GENE code and can e.g. make use of block-structured grids in velocity space, which lower the resolution requirements dramatically. We demonstrate the successful implementation and give an outlook with first applications of the new GENE f-version to the plasma edge. By simulating turbulence at different timepoints within an edge localized mode (ELM) of an ASDEX Upgrade discharge we contribute to the characterization of turbulence in the pedestal within an ELM cycle.