Göttingen 2025 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 10: Poster Session I
P 10.44: Poster
Dienstag, 1. April 2025, 16:15–18:15, ZHG Foyer 1. OG
The isotope dependence of the ASDEX Upgrade pedestal structure — •Roxána Takács1, Michael Dunne1, Benedikt Zimmermann1, 2, and the ASDEX Upgrade Team3 — 1Max Planck Institute for Plasma Physics, Garching, Germany — 2Department of Applied Physics and Applied Mathematics, Columbia University, New York, USA — 3See author list of H. Zohm et al, 2024 Nucl. Fusionhttps://doi.org/10.1088/1741-4326/ad249d
Future fusion devices, such as ITER, will operate with a deuterium-tritium mixture, whereas current experiments use mainly deuterium or hydrogen. Studying the isotope dependence is, therefore, crucial to accurately predict the performance of these future fusion devices. Previous studies have demonstrated positive isotope mass scaling of the thermal energy confinement time in H-mode plasmas. This phenomenon has been observed in several major tokamaks, including JET [C.F. Maggi], JT-60U [H. Urano], ASDEX [M. Bessenrodt-Weberpals] and ASDEX Upgrade [P. A. Schneider]. To further investigate the isotopic dependence, this analysis compares different isotopic plasmas from the ASDEX Upgrade tokamak, focusing on the pedestal region to understand the specific phenomena where isotopes play an important role. Different main isotopic discharges with matched engineering parameters were selected for comparison. The analysis includes comparison of kinetic profiles (temperature, density, and pressure profiles), stability analysis against peeling-ballooning (PB) modes, and investigation of inter-ELM transport differences.
Keywords: Isotope, Pedestal, Stability