München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.5: Poster

Donnerstag, 21. März 2019, 16:30–18:30, Foyer Audimax

Towards Gyrokinetic Turbulence in the Scrape-Off Layer with GENE — •Dominik Michels, Paul Crandall, Denis Jarema, Maurice Maurer, Alejandro Banon Navarro, and Frank Jenko — Max-Planck-Institut für Plasmaphysik, Garching, Deutschland

Studying, understanding and predicting the effects of plasma turbulence in the Scrape-Off layer of a plasma device is of highest importance for future fusion power plants. Our goal is to study the turbulence with the gyrokinetic code GENE. In order to apply GENE successfully in the Scrape-Off layer multiple adaptions to the code are necessary.

Fluctuations of the plasma in the Scrape-Off layer are known to be strong. Therefore non-linear effects, arising from couplings between fluctuations, become important and need to be included in the GENE code. As a first step we implemented and tested a non-linear Focker-Planck-Landau collision operator acting on the full phase space distribution function. The implementation is based on the work by Hager et al. [1] and E. S. Yoon et al. [2].

We demonstrate that the implementation of the collision operator in GENE preserves particles, energy and momentum. Furthermore we present results on temperature relaxation in collisions between different species with realistic mass ratios.

[1] R. Hager et al., Journal of Computational Physics 315 (2016) 644–660.

[2] E. S. Yoon et al., Physics of Plasmas 21, 032503 (2014)