Hannover 2020 – scientific programme
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P: Fachverband Plasmaphysik
P 16: Poster Session 3
P 16.12: Poster
Wednesday, March 11, 2020, 16:30–18:30, Empore Lichthof
Investigations of the peaking of ion temperature profiles in non-inductive high-beta advanced scenarios — •Maximilian Reisner1, Emiliano Fable1, Jörg Stober1, Alexander Bock1, Alejandro Bañon Navarro1, Alessandro Di Sienna1, Rainer Fischer1, Rachael McDermott1, and The ASDEX Upgrade team2 — 1Max-Planck-Institut für Plasmaphysik, 85748 Garching bei München, Germany — 2See the author list of H. Meyer et al. 2019 Nucl. Fusion 59 112014
Non-inductive advanced Tokamak scenarios are a possible way for future nuclear fusion power plants to run in non-pulsed operation. In these scenarios, the ohmic current is replaced by externally driven current and a substantial bootstrap-current. Since the bootstrap current is produced in the presence of pressure gradients, internal transport barriers (ITBs) or regions of reduced transport are favorable to such scenarios. There are several mechanisms that are thought to be connected to the reduction of turbulence in the plasma core, in particular the ExB-shear and electromagnetic fast ion effects. In this contribution, the results of experiments conducted in the tokamak ASDEX Upgrade will be presented that aim to study these mechanisms in more detail. Furthermore, a new heuristic model to more accurately describe the reduction of turbulence in such high-beta non-inductive scenarios in the quasi-linear transport-code TGLF will be presented. This new model is calibrated on experimental results and simulations of the gyrokinetic code GENE.