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P: Fachverband Plasmaphysik

P 19: Poster II

P 19.1: Poster

Thursday, March 31, 2022, 16:00–17:30, P

Validation of quasilinear transport models in the ASTRA framework — •Michael Bergmann, Rainer Fischer, Pedro Molina Cabrera, Klara Höfler, Frank Jenko, and The ASDEX Upgrade Team — Max-Planck-Institute für Plasmaphysik, Boltzmannstr. 2, 85748 Garching

By combining multiple heating and transport subroutines ASTRA is capable of simulating realistic temperature and density radial profiles of fusion plasmas. While these profiles match experimental data taken from e.g. the Integrated Data Analysis (IDA) code, the simulated gradients often differ from measured ones and are largely dependent on the turbulence subroutine chosen. The interest in correct plasma gradients is particularly high as these give rise to the turbulence which dominates the transport. Using two quasi-linear turbulence solvers (TGLF and Qualikiz) as well as their much faster neural-network versions we shall explore the validity and uncertainty of the models in different discharge scenarios via input-error propagation, as well as comparing the models to high-fidelity codes such as GENE and experimental measurements. This work feeds back into attempts of using ASTRA simulations as a theoretical prior for IDA, where the prior of the simulated profile is needed.