München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.88: Poster

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

Integrated modelling of tokamak plasma confinement — •Teobaldo Luda di Cortemiglia, Clemente Angioni, Mike Dunne, Emiliano Fable, Arne Kallenbach, Philip Schneider, Giovanni Tardini, the ASDEX Upgrade Team, and and the EUROfusion MST1 Team — Max-Planck-Institut für Plasmaphysik, Garching, Germany

The design of future fusion reactors and their operational scenarios require an accurate estimate of the plasma confinement, which is a key parameter for the evaluation of the fusion performance, and the production of electricity. We are developing a new model that integrates different elements describing the main physics phenomena which determine plasma confinement. In particular, we are coupling a new pedestal transport model, based on empirical observations, to the ASTRA transport code. We also coupled a simple scrape-off-layer model to ASTRA, which provides the boundary conditions at the separatrix, which are a function of the main engineering parameters. By this way no experimental data is needed, and the only inputs of the model are the magnetic field, the plasma current, the heating power, the fueling rate, the size of the device, and the plasma geometry. In the modelling workflow, first a scan in pedestal pressure is performed, by changing the pedestal width, then the MISHKA MHD stability code is run to determine the pedestal top pressure. The long term goal is to obtain a robust model which can be used to identify important hidden dependencies affecting global plasma confinement, which are difficult to capture by statistical regressions on global parameters.

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