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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.5: Poster
Thursday, March 19, 2026, 13:45–15:45, Redoutensaal
Investigation of the Effects of Anomalous Heat Transport and Diffusion in the W7-X SOL — •Anja Hoffmeister1, Nathan Barbe2, Kelly Garcia1, Nassim Maaziz2, Felix Reimold2, Victoria Winters1, and W7-X Team2 — 1University of Greifswald, Institut for Physics, Felix-Hausdorff-Straße 6, 17489 Greifswald, Germany — 2Max Planck Institute for Plasma Physics, Wendelsteinstraße 1, 17491 Greifswald, Germany
Anomalous heat and particle transport are expected to affect the performance of the Wendelstein 7-X (W7-X) island divertor scrape-off-layer (SOL). While the underlying physical principles are not yet well-understood, mean-field simulation codes like EMC3-Eirene require a suitable parameterization to mock-up their affects on the transport. Typically, this is done via specific input parameters to the simulation. However, previous simulation studies using EMC3-Eirene have indicated unexpected behavior of the plasma parameters with changes of the input anomalous heat and particle diffusion coefficients. The reason has thus far been poorly understood. This work presents a first systematic study of how the anomalous heat and particle diffusion input parameters independently affect the performance of the W7-X SOL in EMC3-Eirene simulations. The investigation focuses on heatflux widths and density build up at the divertor target plate. First investigations have found that, at least in a convective regime, the anomalous heat diffusion coefficient influences divertor density build-up more strongly than the anomalous particle diffusion coefficient. Behavior at different plasma densities will be presented.
Keywords: Wendelstein 7-X; anomalous transport scaling; scrape-off layer; island divertor; EMC3-Eirene