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P: Fachverband Plasmaphysik
P 2: Magnetic Confinement I/HEPP I
P 2.4: Vortrag
Montag, 20. März 2023, 12:20–12:45, CHE/0091
Analysis and modeling of momentum transport based on NBI modulation experiments at ASDEX Upgrade — •Benedikt Zimmermann1,2, Rachael McDermott1, Clemente Angioni1, Basil Duval4, Ralph Dux1, Emiliano Fable1, Antti Salmi3, Ulrich Stroth1,2, Tuomas Tala3, Giovanni Tardini1, Thomas Pütterich1, and the ASDEX Upgrade Team5 — 1Max Planck Institute for Plasma Physics, 85748 Garching, Germany — 2Physik-Department E28, Technische Universität München, 85747 Garching, Germany — 3VTT, P.O. Box 1000, FI-02044 VTT, Finland — 4EPFL, Swiss Plasma Center, CH-1015 Lausanne, Switzerland — 5see the author list of U. Stroth et al. 2022 Nucl. Fusion 62 042006
Understanding momentum transport is crucial to reliably predict the plasma rotation profiles in future fusion devices. At ASDEX Upgrade, momentum transport studies are used to validate theoretical models and transport codes. An advanced momentum transport analysis framework uses NBI modulation to extract the contribution of diffusion, convection, and intrinsic torque to momentum transport within the core plasma. Recent work focused on a possible mass dependence by comparing hydrogen and deuterium plasmas. Both momentum transport coefficients were found to be the same within error bars indicating no significant mass dependence. Gyrokinetically predicted Prandtl number and pinch number agree with the experimental results. Furthermore, a robust error analysis quantified the uncertainties of the assessed coefficients and the uniqueness of the determined solution in the scanned parameter range.