München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.109: Poster

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

Detachment with the 3D turbulent transport code GRILLIX — •Wladimir Zholobenko, Alexander Ross, Andreas Stegmeir, Thomas Body, David Coster, Omar Maj, Peter Manz, and Frank Jenko — Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany

The plasma edge of magnetic confinement devices is thought to be crucial in determining the performance and survival of the whole machine. The description of this region from first principles is highly demanding: the presence of large gradients drives large turbulent fluctuations, requiring simultaneous time evolution of the background. Further, due to the proximity of the walls, the plasma edge is highly influenced by atomic, molecular and surface processes.

To study the interaction of these processes with turbulence and their interdependency we extend GRILLIX1,2: a 3D global turbulence code based on drift-reduced Braginskii equations. The plasma model and its implementation are verified with a simulation of the LAPD experiment. A simple recycling model drastically alters the behaviour of the plasma: the enforced parallel gradients amplify turbulent fluctuations and filamentation, challenging numerical stability. The treatment of these phenomena in tokamak and stellarator geometries is undertaken.

[1] A. Ross. Extention of GRILLIX: Towards a global turbulence code for realistic magnetic geometries. Ph.D. thesis, Technical University of Munich (2018).

[2] A. Stegmeir et al. Plasma Physics and Controlled Fusion, 60 (3), 035005 (2018)

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