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P: Fachverband Plasmaphysik
P 1: Magnetic Confinement I/HEPP I
P 1.3: Talk
Monday, February 26, 2024, 11:55–12:20, ELP 6: HS 3
Verification of the gyrokinetic code GENE-X for the edge and scrape-off layer of stellarators — •Marion Smedberg1, Philipp Ulbl1, Andreas Stegmeir1, and Frank Jenko1,2 — 1Max Planck Institute for Plasma Physics, Garching, Germany — 2University of Texas at Austin, Austin, TX, USA
A key open question in magnetic confinement fusion research regards plasma turbulence, particularly in the edge and scrape-off layer (SOL). This is especially true for stellarators, since optimization for low neoclassical transport has only recently been proven; the remaining transport is determined to be turbulent [1]. Numerical codes which simulate the plasma turbulence in such devices are critically important to understand the experiments and predict future reactor performance. Here we present GENE-X, a full-f, electromagnetic, Eulerian gyrokinetic code designed for the edge and SOL [2], and its generalization to stellarator geometries. We describe the 3D generalization, including the implementation of non-axisymmetric magnetic fields, development of an approximate flux surface label, and the newly generalized data structure. We also discuss the ongoing verification of the 3D-capable code. This includes convergence testing via the method of manufactured solutions, and could include recreating neoclassical transport predictions and a benchmark against the gyrokinetic code GENE-3D.
[1] T. S. Pedersen et al, Nucl. Fusion 62 042022 (2022)
[2] D. Michels, et al, Comput. Phys. Commun. 264 (2021)
Keywords: gene-x; gyrokinetics; stellarator; plasma turbulence; scrape-off layer