Influence of the 3D main chamber geometry on SOL plasma parameters of ASDEX UPGRADE

Simulated plasma backgrounds for impurity migration schemes in Tokamaks focus mainly on divertor solutions and match experimental up- and downstream profiles in a poloidal cross section. This assumes toroidally symmetric plasma solutions in both the divertor and upstream in the main chamber. While the divertor is essentially toroidally symmetric, the main chamber often includes features like poloidal limiters and probes that can break this symmetry. Taking these toroidal asymmetries into account impacts ionization source distributions, plasma profiles and flow patterns. This has an influence on particle fluxes to and from wall elements and changes the redistribution of impurities within the vessel.For this talk EMC3-EIRENE was used to simulate two plasma backgrounds. One plasma background assuming a toroidally symmetric vessel wall and one background featuring 3D poloidal limiters and a midplane deposition probe. Differences in both plasma solutions and resulting changes in the redistribution of impurities will be presented.