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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.79: Poster
Donnerstag, 19. März 2026, 13:45–15:45, Redoutensaal
Investigating drift effects in island divertors with the mean-field Braginskii model — •Tobias Tork1,2, Felix Reimold1, David Bold1, Ben Dudson3, Andreas Stegmeir4, and Peter Manz2,1 — 1Max Planck Institute for Plasma Physics, Wendelsteinstr. 1, 17491 Greifswald, Germany — 2Institute of Physics, University of Greifswald, 17489 Greifswald, Germany — 3Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore CA 94550, USA — 4Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching, Germany
The inclusion of drifts has been shown to be critically important for the boundary physics of tokamaks and has a significant impact on the predictions of divertor heat loads and impurity transport. Current state-of-the-art stellarator boundary simulations like EMC3-Eirene do not include drifts, but experiments in W7-X already show numerous indications of drift effects. Such effects could significantly alter the heat loads on the divertors or redistribute the plasma profiles.
In this contribution, we present the development of a 3D simulation for island diverted stellarators. The model is derived from the Hermes-2 physics model by parameterizing the divergence of the polarization drift with a set of anomalous diffusion coefficients. The simulation tool allows for the analysis of potential and current distributions in stellarators.
We will show results of drift effects in an island divertor. Stagnation points of the parallel ion flow demonstrate a significant poloidal shift which depends on the magnetic field direction.
Keywords: Stellarator; Transport; Drifts; Electrostatic potential