München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.4: Poster

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

"PICLS" - Development of a Gyrokinetic Particle-in-cell code for the scrape-off layer — •Mathias Boesl, Andreas Bergmann, Alberto Bottino, David Coster, and Frank Jenko — Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany

Plasma properties (density/temperature) at the plasma edge and in particular the scrape-off layer significantly influence plasma confinement. Thus, to understand and control plasma properties of the Tokamak edge is crucial. Especially steep gradients and large amplitudes of disturbance within the scrape-off layer region increase complexity. To further examine this topic the PIC-code "PICLS" (technology heavily based on ORB5 PIC-code) is currently under development.

"PICLS" in a first step targets to study sheath boundary conditions at the plasma/wall interface. In particular, the logical sheath - which is designed to model a Debye sheath at the boundary without actually resolving it - will be researched. For a Gyro-kinetic model this approach seems advantageous, but its usability still needs to be studied further. The gained expertise will be used for further development of the already existing core code ORB5 towards the plasma edge. Also a benchmark with other codes (e.g., Gkeyll, GENE) that address scrape-off layer physics is planned.

The main novelty of this approach consists in studying scrape-off layer models with a combination of a PIC code and a Gyro-kinetic model. The high performance and validity of this approach could already be shown within the core, but the usability within the scrape-off layer still needs to be tested.