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P: Fachverband Plasmaphysik
P 7: Magnetic Confinement III
P 7.2: Vortrag
Dienstag, 17. März 2026, 16:45–17:10, KH 02.016
Gyrokinetic studies in pedestal plasmas — •facundo sheffield1, tobias goerler1, gabriele merlo1, lidija radovanovic2, felix wilms1, elisabeth wolfrum1, clemente angioni1, frank jenko1, and the asdex upgrade team3 — 1Max Planck Institute for Plasma Physics, Bolzmannstraße 2, Garching, Germany — 2Institute of Applied Physics, TU Wien, Fusion@ÖAW, Wiedner Hauptstr. 8-10, Vienna, Austria — 3See author list of H. Zohm et al, https://doi.org/10.1088/1741-4326/ad249d
The pedestal region in tokamak plasmas plays a critical role in determining overall confinement and performance. However, given the steep pressure gradients, high shaping and the interplay between several transport channels, the rich physics of the pedestal remains to be fully understood.
We therefore aim to shed light into key aspects of pedestal physics with high fidelity gyrokinetic simulations using the GENE and GENE-X codes. First we showcase the implementation and importance of parallel magnetic fluctuations in global pedestal simulations. Then, we study electron-scale pedestal instabilities propagating in the ion diamagnetic direction and show how they are still electron temperature gradient modes despite their unusual drift direction. Finally, we focus on the effects of shaping on the pedestal via changes in turbulent transport at multiple scales. Overall, our work advances the understanding of pedestal microinstabilities, clarifies the role of pedestal shape in turbulent transport, and showcases the relevance of parallel magnetic fluctuations in these systems.
Keywords: gyrokinetics; turbulence; tokamak; pedestal