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P: Fachverband Plasmaphysik

P 17: Poster II

P 17.34: Poster

Freitag, 3. September 2021, 14:00–16:00, P

Non-local neoclassical PIC simulations for the radial electric field in stellarators — •Michal Kuczynski, Ralf Kleiber, and Hakan Smith — Wendelsteinstraße 1, 17491 Greifswald

Transport in fusion plasma devices has typically two contributions: turbulent and neoclassical. The latter is most significant in stellarators and thus, for further experimental advances, a thorough understanding of the neoclassical transport is required. Perhaps one of the greatest achievements of the (local) neoclassical theory is the prediction of the neoclassical radial electric field. However, the theory has its limitations. For instance, when the electric field changes sign (at the transition zone between the ion and electron roots), the theory may predict multiple values of the radial electric field, which is unphysical. To understand the physics in such scenarios we perform neoclassical PIC simulations with the addition of non-local terms and calculate the resultant electric field self-consistently.