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P: Fachverband Plasmaphysik
P 7: Magnetic Confinement III
P 7.5: Vortrag
Dienstag, 27. Februar 2024, 12:15–12:30, ELP 6: HS 3
Electromagnetic particle-in-cell simulation of the tokamak scrape-off layer — •Annika Stier1, Alberto Bottino1, David Coster1, Thomas Hayward-Schneider1, Andreas Bergmann1, Frank Jenko1, and Laurent Villard2 — 1Max-Planck Institute for Plasma Physics, Boltzmannstrasse 2, Garching, 85748, Bavaria, Germany — 2Ecole Polytechnique Federale de Lausanne (EPFL) Swiss Plasma Center (SPC), Rte Cantonale, Lausanne, CH-1015, State Two, Switzerland
The particle-in-cell code PICLS is a full-f finite element tool intended to simulate turbulence in the tokamak scrape-off layer using gyrokinetic ions and drift-kinetic electrons. Up until now however, PICLS has been a purely electrostatic code with a prescribed background magnetic field. This approach is not perfectly suited to represent unstable regimes occurring in the scrape-off layer, since although β = 2µ0p/B2 can be small, turbulence there is still dominated by electromagnetic effects [1]. In order to capture those effects, an Ampère-solver is added to the code and the evolving magnetic field is taken into account in the particle pusher stage. In order to combat the Ampère-cancellation problem that arises from the Hamiltonian canonical Lagrangian formulation that PICLS is based on, we combine the newly added Ampère-solver with a pullback scheme akin to the one used in ORB5 [2]. This improved version of PICLS opens up possibilities in simulating β-dependent ITG-KBM transitions like illustrated in ref. [3] for the codes GENE, GKW, EUTERPE and ORB5, shear Alfvén waves, microtearing modes and more.
Keywords: Scrape-off-layer; Particle-in-cell; Finite Elements; Electromagnetics; Plasma Simulation