München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.105: Poster

Donnerstag, 21. März 2019, 16:30–18:30, Foyer Audimax

Scale-Resolved Multi-Field Experimental Investigation of Turbulence for the Validation of Gyrokinetic Simulations — •Klara Höfler1,2, Tim Happel1, Pascale Hennequin3, Alexander J. Creely4, Tobias Görler1, Elisee Trier1,5, Ulrich Stroth1,2, and the ASDEX Upgrade Team11Max Planck Institut für Plasmaphysik, Garching, Germany — 2Physik Department TUM, E28, Garching, Germany — 3Laboratoire de Physique des Plasmas, Ecole Polytechnique, Palaiseau, France — 4MIT Plasma Science and Fusion Center, Cambridge, Massachusets, USA — 5Max Planck Institut für Plasmaphysik, Greifswald, Germany

Fusion plasmas need high densities, temperatures and long energy confinement times. Turbulence is one of the key players to determine these parameters via particle and heat transport. The corresponding density and temperature fluctuations are measured on the ASDEX Upgrade tokamak via Doppler-reflectometry and electron cyclotron emission diagnostics. Past individual studies in a long history of gyrokinetic validations showed a good agreement between experiments and modelling.

Here the design of a plasma discharge is outlined which will extend these studies by simultaneously measuring as many as possible turbulence properties in order to obtain strong constraints for simulation codes, such as the gyrokinetic code GENE. Initial results of the plasma fluctuation velocity profile perpendicular to the confining magnetic field are presented for various poloidal angles. In addition preliminary studies of core zonal flows, which are low frequency shear flows are shown.

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