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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.36: Poster
Donnerstag, 19. März 2026, 13:45–15:45, Redoutensaal
Towards neoclassical tungsten transport calculations in the edge and island divertor region of optimized stellarators — •Diogo Mendonça1,2, Matthias Hoelzl1, Orin Varley1,2, Mate Szucs1,2, and Luca Venerando Greco1 — 1Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany — 2TUM School of Natural Sciences, Boltzmannstraße 10, 85748 Garching, Germany
The successful operation of future nuclear fusion power plants requires strict control over tungsten (W) impurity transport during plasma discharges. If these high-Z impurities accumulate within the plasma, they may severely degrade fusion performance, or make it impossible altogether. This critical issue is not yet fully understood in tokamaks, and even less so in stellarators, which have recently seen renewed interest as promising magnetic confinement concepts. This contribution presents the first studies of collisional W transport using the kinetic model developed in the JOREK code, combined with its recently implemented reduced magnetohydrodynamics (MHD) stellarator model, focusing specifically in the trace impurity limit. By varying the initial positions of W particles within a fixed W7-AS stellarator equilibrium, we aim to quantify the influence of collisions, the electric field, and temperature around magnetic islands on the transport of W in the edge and island divertor region.
Keywords: Transport; Impurity; Stellarator; 3D non-linear MHD