SMuK 2021 – scientific programme
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P: Fachverband Plasmaphysik
P 6: Magnetic Confinement III & Helmholtz Graduate School II
P 6.2: Talk
Tuesday, August 31, 2021, 17:00–17:25, H5
GENE-X: A Gyrokinetic Turbulence Code for the Edge and Scrape-Off Layer — •Dominik Michels1, Andreas Stegmeir1, Philipp Ulbl1, Frank Jenko1,2, and the ASDEX Upgrade Team3 — 1Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany — 2University of Texas at Austin, Austin, TX 78712, USA — 3See author list of Meyer H et al 2019 Nucl. Fusion 59 112014
Plasma turbulence in the edge and scrape-off layer is characterized by steep gradients and large fluctuation amplitudes. As such, nonlinear effects caused by the coupling between the plasma background and fluctuations are important and a so called full-f treatment of the underlying equations is necessary. Furthermore, the poloidal magnetic field vanishes at the X-Point of a tokamak – which introduces a coordinate singularity in the commonly used flux coordinates.
To tackle these problems we have created the gyrokinetic turbulence code GENE-X [1], a new version of the established GENE [2] code. GENE-X implements a full-f gyrokinetic model and is able to perform simulations in single-null, double-null as well as other advanced divertor geometries by using the flux coordinate independent approach [3]. We present a careful verification of the GENE-X code and demonstrate its ability to simulate gyrokinetic turbulence in single null geometry at the example of ASDEX Upgrade.
[1] F. Jenko et al., Phys. Plasmas 7 (2000) 1904
[2] D. Michels et al., Comput. Phys. Commun. 264 (2021) 107986
[3] F. Hariri et al., Comput. Phys. Commun. 184 (2013) 2419