Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session DI02: Magnetic Confinement Fusion II
3:00 PM–5:00 PM,
Monday, October 17, 2022
Room: Ballroom 100 B
Chair: Donald Spong, Oak Ridge National Lab
Abstract: DI02.00001 : Validation of gyrokinetic edge and scrape-off layer turbulence simulations vs TCV experiments
3:00 PM–3:30 PM
Presenter:
Philipp Ulbl
(Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany)
Authors:
Philipp Ulbl
(Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany)
Thomas Body
(Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany)
Andreas Stegmeir
(Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany)
Frank Jenko
(University of Texas at Austin; Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany)
In this work, we present the latest improvements to the grid-based "continuum" gyrokinetic turbulence code, GENE-X [1], with applications to TCV. GENE-X is specifically targeted for edge and SOL simulations, since it can perform simulations in diverted geometries by using the flux-coordinate independent approach [2]. From the start, it features a full-f, gyrokinetic turbulence model and it was recently improved to include electromagnetic effects [3]. Here, we introduce further improvements to the physics model, by including the effect of collisions via either a basic Bhatnagar-Gross-Krook or a more sophisticated Lenard-Bernstein/Dougherty collision operator [4].
We present the results of a series of GENE-X simulations for the diverted L-mode validation case "TCV-X21" [5]. The simulations presented use different collision models, which vary in their physics fidelity. We analyze the resulting plasma profiles, power balance, and SOL heat flux and compare against experimental measurements in the openly available TCV-X21 dataset [5]. The result of the code validation generally improves with the fidelity of the collision model chosen. Based on these results, we assess and discuss the effect of collisions on gyrokinetic edge and SOL turbulence.
[1] D. Michels et al., Comput. Phys. Commun. 264 (2021) 107986
[2] F. Hariri et al., Comput. Phys. Commun. 184 (2013) 2419
[3] D. Michels et al., Phys. Plasma 29 (2022) 032307
[4] P. Ulbl et al., Contrib. Plasma Phys., e202100180 (2021)
[5] S. Oliveira et. al., Nucl. Fusion, (2022), in press
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