Göttingen 2025 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 17: Poster Session II
P 17.3: Poster
Mittwoch, 2. April 2025, 16:15–18:15, ZHG Foyer 1. OG
3D nonlinear MHD simulations with kinetic neutrals and impurities — •Mate Szucs1, Matthias Hoelzl1, Andrés Cathey1, Yu-Chih Liang1, and Sven Q. Korving2 — 1Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching b. M., Germany — 2ITER Organization, 13067 St. Paul Lez Durance Cedex, France
In reactor-scale tokamaks like ITER, both transient and stationary heat and particle fluxes pose significant threats to plasma-facing components and the safe operation of the machine. Stationary fluxes can be mitigated by "detaching" the divertor using neutral or impurity atoms, which effectively act as a neutral cushion. This detached state can be disrupted by transient heat fluxes originating from MHD edge instabilities, such as type-I or even small ELM, a phenomenon known as burn-through. Therefore, predicting such transients under realistic scrape-off layer (SOL) conditions, which enable the modeling of detachment, is crucial.
The JOREK nonlinear MHD code is routinely used to predict large and small ELM regimes, among other phenomena. The base fluid model has been coupled with kinetic neutral and impurity extensions, allowing for the simultaneous simulation of transient MHD and SOL processes. In this contribution, the first 3D simulations of small ELM burn-through and X-point Radiator Regime (XPR) are presented.
Keywords: ELMs; Detachment; SOL; XPR; Nonlinear MHD