München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.100: Poster

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

Theory-based modelling of advanced scenarios in ASDEX Upgrade — •Maximilian Reisner1,2, Jörg Stober1,2, Emiliano Fable1, Alexander Bock1, Benedikt Geiger1, David Rittich1, Alejandro Bañon Navarro1, Rachael McDermott1, and The ASDEX Upgrade Team11MPI für Plasmaphysik, Garching, Germany — 2Ludwig-Maximilian-Universität, München, Germany

For the design of future nuclear fusion power plants, one needs to be able to extrapolate to larger scale devices. It is therefore important to have transport codes that allow the user to reproduce experiments done in current scale devices. Fully gyrokinetic codes like GENE allow for high accuracy, but are also very slow. A faster alternative is the quasilinear gyrofluid transport code TGLF, which is based on linear approximations to the gyrokinetic equations combined with so-called saturation rules. While being a well tested transport code in standard scenarios, TGLF in the past has failed to reproduce the good energy confinement observed in certain advanced scenario shots. In my poster, I will discuss some recent ASTRA/TGLF simulations of ASDEX Upgrade advanced scenario shots that manage to reproduce the good energy confinement of such discharges much better than was previously possible. This improvement was achieved by forcing ASTRA to keep the equilibrium fixed and adding fast ions as a kinetic species. Another important component in the TGLF simulations is the rule governing the suppression of turbulence via the ExB-shear, which was changed in a recent version of TGLF. The validity of this new rule was cross-checked with GENE simulations.

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