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P: Fachverband Plasmaphysik
P 9: HEPP III
P 9.1: Vortrag
Dienstag, 27. Februar 2024, 14:00–14:25, ELP 6: HS 3
Integrated modelling of impurity transport in ASDEX Upgrade — •Daniel Fajardo1, Clemente Angioni1, Ralph Dux1, Emiliano Fable1, Giovanni Tardini1, and the ASDEX Upgrade Team2 — 1Max-Planck-Institut für Plasmaphysik, Garching, Germany — 2see author list of Stroth et al 2022 Nucl. Fusion 62 042006
Impurities play crucial roles in fusion devices, from the deleterious fuel dilution and radiative cooling of the core to the beneficial edge cooling for safe power exhaust. Predicting their behavior and effects becomes essential as tokamaks approach reactor operation. We present an integrated framework that demonstrates multi-species, multi-channel modelling capabilities for the prediction of impurity density profiles and their feedback on the main plasma through radiation and dilution. It combines all presently known theoretical elements in the local description of quasi-linear turbulent and collisional transport.
The workflow reproduces ASDEX Upgrade experimental results in L-mode and H-mode, with full-radius and core simulations, respectively. In particular, predictions of a radiative L-mode with one seeded (Ar) and two intrinsic (B, W) impurities match its measured radiated power and H-mode-like confinement. Likewise, the control of W accumulation with ECRH and ICRH in NBI-heated H-mode plasmas is studied in dynamical simulations of experiments featuring wave heating power steps, finding good agreement with the measured W peaking.
Keywords: Impurity transport; Integrated modelling; Turbulence; Neoclassical