SMuK 2023 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 14: Magnetic Confinement IV/HEPP VI

P 14.1: Hauptvortrag

Donnerstag, 23. März 2023, 11:00–11:30, CHE/0091

Experimental validation of turbulence codes — •Klara Höfler — Institut für Plasmaphysik, Greifswald, Germany

Turbulence is a main driver of heat transport, which deteriorates the performance of fusion reactors. Simulation codes aiming for identifying turbulence optimized devices need to be validated against experiments.

The comprehensive set of experimental turbulence data presented here is measured at the ASDEX Upgrade tokamak for two plasma scenarios. It includes wavenumber spectra, electron density and temperature fluctuation amplitudes and radial correlation lengths as well as the cross phase between density and temperature fluctuations. These quantities are measured for comprehensive code validation by Doppler reflectometers and an electron cyclotron emission radiometer. In this talk they are compared to the gyrokinetic code GENE because of its mature capabilities to assess and reproduce core turbulence. In addition synthetic diagnostic modeling is included to account for diagnostic effects on measurements.

The work presented in this talk shows the encouraging example of code validation where a remarkable number of measured physics quantities is successfully reproduced by the code. It comprises contributions of a variety of collaborators both on the experimental side – Institut für Plasmaphysik (IPP) in Garching, Plasma Science and Fusion Center of MIT in Cambridge and Laboratoire de Physique des Plasmas of the Ecole Polytechnique in Palaiseau – and on the theory side – IPP Garching and Institut für Grenzflächenverfahrenstechnik und Plasmatechnologie in Stuttgart.