Bremen 2017 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 2: Helmholtz Graduate School I
P 2.4: Vortrag
Montag, 13. März 2017, 09:45–10:10, HS 1010
Divertor Heat Fluxes with Magnetic Perturbations at High Densities in the Tokamak ASDEX Upgrade — •Dominik Brida1,2, Tilmann Lunt1, Marco Wischmeier1, Matthias Bernert1, Daniel Carralero1, Michael Faitsch1, Till Sehmer1, Bernhard Sieglin1, Yühe Feng3, Wolfgang Suttrop1, Elisabeth Wolfrum1, The MST1 Team1, and The ASDEX Upgrade Team1 — 1Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 — 2Physik Department, Technische Universität München, James-Franck-Str. 1, D-85748 Garching — 3Max-Planck-Institut für Plasmaphysik, Wendelsteinstr. 1, D-17491
Magnetic Perturbations have been the subject of extensive research in the last years, due to the prospect of mitigating harmful edge localized modes (ELMs) in future divertor tokamaks, such as ITER. As an undesireable side effect MPs can create a toroidally non-uniform divertor target heat flux. This has been consistently measured, among others, in the tokamak ASDEX Upgrade (AUG) at low divertor densities. However, currently it is envisaged to operate ITER in a partially detached regime, at high divertor densities, where the impact of transport may be different.
To address this issue a comprehensive set of high density L- and H-mode deuterium discharges with MPs were carried out in AUG. It was found that the target heat flux becomes increasingly axisymmetric as the divertor detaches. Furthermore, a similar tendency has been observed in simulations with the 3D transport code EMC3-EIRENE.