Göttingen 2025 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 17: Poster Session II
P 17.8: Poster
Mittwoch, 2. April 2025, 16:15–18:15, ZHG Foyer 1. OG
Simulations of the X-point Radiator in ASDEX Upgrade with Kinetic Neutrals and Impurities in JOREK — •Yu-Chih Liang1,2, Andres Cathey1, Matthias Hoelzl1, Ulrich Stroth1,2, Sven Korving3, Mate Szuecs1,2, Felix Antlitz1,2, Daniël Maris3, JOREK Team1, and ASDEX Upgrade Team1 — 1Max Planck Institute for Plasma Physics, 85748 Garching, Germany — 2TUM School of Natural Sciences, Physics Department, 85748 Garching, Germany — 3Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
The problem of power exhaust in the future thermonuclear fusion reactors, such as ITER and DEMO, necessitates operation regimes that can avoid extreme heat fluxes onto plasma-facing components. One promising regime is the X-point radiator (XPR), a cold, dense, and highly radiative plasma region that forms above the X-point of the single-null magnetic configuration in a tokamak plasma. This poster presents axisymmetric (2D) simulations of the XPR regime using the nonlinear magnetohydrodynamic (MHD) code, JOREK, extended with a kinetic particle framework for neutral deuterium particles and impurities. Three simulations are presented: one with a quasi-stationary XPR, one with the XPR moving vertically upwards and turning into an unstable solution (MARFE), and one with the XPR moving vertically downwards and being lost. These three simulations show JOREK's capability of simulating time-varying XPR, and they provide a baseline for the transition to 3D simulations, so the MHD activities and their interaction with the XPR can be studied.
Keywords: Tokamak plasma; Power exhaust; X-point radiator; MHD simulation; Kinetic particles