Hannover 2020 – scientific programme

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P: Fachverband Plasmaphysik

P 5: Poster Session 1

P 5.28: Poster

Monday, March 9, 2020, 16:30–18:30, Empore Lichthof

The effect of Magnetic Geometry on Turbulence in Advanced Divertor Configurations — •Thomas Body, Wladimir Zholobenko, Andreas Stegmeir, David Coster, and Frank Jenko — Max-Planck-Institut für Plasmaphysik, Garching, Deutschland

Advanced Divertor Configurations (ADCs) promise improved control of the plasma exhaust in future fusion power plants such as DEMO. These alternative magnetic configurations modify the magnetic field of the SOL and divertor to achieve higher poloidal flux expansion, increased divertor parallel connection lengths and improved neutral baffling. This work will discuss the relative impact of physical mechanisms which determines the width of the directed heat- and particle-flux channels for fluid-turbulence simulations performed with GRILLIX. The advanced divertor configurations considered by the EURO-Fusion Work Package DTT1-ADC (namely the Snowflake, X, Super-X, Double-null divertor configurations) are compared to a 'conventional' Single-null divertor configuration. For these cases, "scaled-DEMO" simulations are performed due to computational limits. These simulations have the same magnetic geometry as the full device but have a spatial scale and parameter set similar to the COMPASS device. To investigate the effect of scaling to larger scales, we compare results for the same magnetic configuration run at several machine sizes.