Erlangen 2026 – scientific programme
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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.12: Poster
Thursday, March 19, 2026, 13:45–15:45, Redoutensaal
Characterization of plasma turbulence during ELM suppression with Resonant Magnetic Perturbations in ASDEX Upgrade — •Bojana Stefanoska1, Wolfgang Suttrop1, Matthias Willensdorfer1, Rachael M. McDermott1, Florian Rath2, Arthur Peeters2, and the ASDEX Upgrade Team3 — 1Max Planck Institute for Plasma Physics, 85748 Garching, Germany — 2University of Bayreuth, 95447 Bayreuth, Germany — 3see author list of H. Zohm et al. 2024 Nucl. Fusion 64 112001
ELMs pose a major challenge for future fusion reactors due to their potentially unsustainable heat loads on plasma-facing components. Resonant magnetic perturbations (RMPs) can mitigate or suppress ELMs, but the underlying physics of RMP-induced suppression remains unclear. Previous ASDEX Upgrade experiments have shown that the application of RMPs coincides with the onset of a characteristic turbulence regime at the plasma edge, leading to enhanced radial particle transport and a significant reduction of the pedestal density. However, the driving instability, the nonlinear saturation mechanism, and the structure of this turbulence remain open questions. The recently upgraded ECEI diagnostic at ASDEX Upgrade provides high-resolution, 2D measurements of electron temperature fluctuations and is expected to play a central role in the upcoming campaign. In preparation, we perform a systematic multi-diagnostic analysis of turbulence data in previous AUG RMP discharges to identify the dependencies of RMP-driven turbulence on plasma parameters and to guide future experimental strategies. The poster will present an overview of these findings.
Keywords: edge turbulence; RMP ELM suppression; ECEI diagnostic