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P: Fachverband Plasmaphysik
P 22: Helmholtz Graduate School HEPP V
P 22.1: Talk
Friday, April 1, 2022, 14:00–14:25, P-H12
Experimental validation of gyrokinetic simulation with scale-resolved multi-field turbulence measurements — •Klara Höfler1,2, Tobias Görler2, Tim Happel2, Pascale Hennequin3, Pedro Molina Cabrera2,4, Michael Bergmann2, Rachel Bielajew4, Carsten Lechte5, Anne White4, Ulrich Stroth2,1, and the ASDEX Upgrade Team2 — 1Physik Department E28, TUM, Garching, Germany — 2MPI für Plasmaphysik, Garching, Germany — 3LPP, Ecole Polytechnique, Palaiseau, France — 4MIT PSFC, Cambridge, Massachusets, USA — 5IGVP, Stuttgart, Germany
Turbulence is the main driver of heat transport which deteriorates the performance of fusion reactors. To design turbulence optimised devices, simulation codes need to be validated by experiments. Validation work has already been done for single or a reduced number of parameters.
The comprehensive set of turbulence data presented in this contribution is measured on ASDEX Upgrade in different plasma scenarios but at the same radius. It includes wavenumber spectra, density and temperature fluctuation amplitudes and radial correlation lengths, the poloidal dependence of the velocity perpendicular to the magnetic field and the cross phase between density and temperature fluctuations.
These quantities are measured for extensive code validation by Doppler reflectometers and a CECE radiometer. They are compared to non-linear simulations of the gyrokinetic code GENE because of its mature capabilities to assess and reproduce core turbulence. In addition synthetic diagnostic modeling accounts for diagnostic effects.