Erlangen 2018 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 11: Helmholtz Graduate School - Poster
P 11.12: Poster
Dienstag, 6. März 2018, 16:15–18:15, Redoutensaal
ELM heat loads on the ASDEX Upgrade divertor in high density discharges — •Davide Silvagni1,2, Thomas Eich1, Michael Faitsch1, Bernhard Sieglin1, Dominik Brida1,2, Pierre David1, and ASDEX Upgrade team1 — 1Max-Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching, Germany — 2Physik-Department E28, Technische Universität München, 85747 Garching, Germany
A reliable prediction of the Edge Localised Mode (ELM) induced heat loads on the divertor of larger devices such as ITER is crucial, since it defines the operational range of future devices as well as the need for mitigation techniques. A recent scaling of the ELM (peak) energy fluence predicts unacceptable heat loads on the ITER divertor tiles in the Q=10 scenario, if no mitigations are applied. For this reason, in this work the ELM power loads on the divertor of ASDEX Upgrade will be studied in discharges with high plasma edge density and detached divertor to discern whether a reduction of the ELM energy fluence can be found. However, in the presence of detachment the measurement of the divertor target temperature with standard infrared cameras is not possible because of the enhanced Bremsstrahlung radiation nearby the divertor tiles. For this reason, in 2018 ASDEX Upgrade will be equipped with a new infrared diagnostics that is expected to provide more reliable measurements of the divertor temperature (and heat flux) in plasma scenarios with high edge density. In this work, the new infrared diagnostics is presented as well as the most recent studies on ELM heat loads.