Erlangen 2026 – scientific programme
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P: Fachverband Plasmaphysik
P 22: Plasma Wall Interaction III
P 22.2: Talk
Friday, March 20, 2026, 09:30–09:45, KH 01.012
Initial predictive modeling of plasma-wall interactions using ERO2.0 for W7-X with tungsten wall divertor — •Georgii Timkovskii1, Juri Romazanov1, Sebastijan Brezinsek1,2, Daniil Ryndyk1, Henri Kumpulainen1, and W7-X Team3 — 1Forschungszentrum Jülich GmbH, IFN-1 - Plasma Physics, Jülich, Germany — 2Mathematisch-Naturwissenschaftliche Fakultät, HHU Düsseldorf, Düsseldorf, Germany — 3Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
Plasma-wall interaction (PWI) is a critical aspect of fusion device operation, influencing material lifetime, fuel retention, and overall plasma performance. In addition to interpretive modelling used to analyze and understand physics experiments, predictive modeling with validated codes like ERO2.0 becomes essential for anticipating system behavior and guiding design or operational decisions as required for an exchange of the wall material in Wendelstein 7-X (W7-X). ERO2.0 is a fully kinetic Monte Carlo code dealing with PWI processes at the surface and incorporating phenomena such as drifts, ionization, and impurity-ion collisions in the plasma. While there have been multiple ERO2.0 studies of stellarators - including cases with some tungsten components - no systematic investigation exist for a fully metallic stellarator with a tungsten divertor. In this work, PWI and impurity transport for the W7-X stellarator are studied with focus on the planned wall material exchange from a carbon wall to a tungsten wall. The influence of the resolution of existing 3D grids on the resulting PWI and impurity transport is analyzed.