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P: Fachverband Plasmaphysik

P 16: Poster Session Plasma Physics

P 16.62: Poster

Donnerstag, 19. März 2026, 13:45–15:45, Redoutensaal

Validation of nitrogen-seeded XPR simulations and comparison with other impurities on ASDEX Upgrade using JOREK — •Mate Szucs^1,2, Andres Cathey¹, Matthias Hölzl¹, Yu-Chih Liang¹, Matthias Bernert¹, Ou Pan¹, Daniel Maris³, Sven Korving², Javier Artola², Richard Pitts², and The ASDEX Upgrade team¹ — ¹Max Planck Institute for Plasma Physics, Garching, Germany — ²ITER Organization, St. Paul Lez Durance Cedex, France — ³DIFFER, Eindhoven, Netherlands

The X-Point Radiator (XPR) regime is a promising exhaust solution for future large-size tokamaks, featuring a cold, dense, highly radiative region above the X-point, inside the confined region. Such regimes have been achieved experimentally on several tokamaks, with different seeded impurities, and ELM suppression is seen when the XPR reaches a threshold height. Modeling with several codes has successfully reproduced several features seen in experiments. However the the effects on the pedestal which results in ELM suppression has not been studied. In this contribution, we present the current status of modeling of the XPR regime on the ASDEX Upgrade (AUG) tokamak with the visco-resistive nonlinear MHD code JOREK. An extension treats neutrals and impurities kinetically, including their interactions with the background fluid plasma. This extension is under constant development, allowing for benchmarking with other codes and experimental validation. Nitrogen-seeded simulations are compared to SOLPS-ITER and AUG experiments, further modeling is presented using different impurity species such as argon and neon.

Keywords: XPR; Simulations; AUG; JOREK