SMuK 2023 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 11: Poster I
P 11.45: Poster
Mittwoch, 22. März 2023, 14:00–15:30, HSZ EG
ASDEX Upgrade shattered pellet injection experiments — •Paul Heinrich1, Gergely Papp1, Matthias Bernert1, Pascal de Marné1, Mathias Dibon1, Stefan Jachmich2, Michael Lehnen2, Tobias Peherstorfer3, Umar Sheikh4, Jakub Svoboda5, The ASDEX Team6, and The MST1 Team7 — 1Max-Planck-Institut für Plasmaphysik, Garching, Germany — 2ITER, St. Paul-lez-Durance, France — 3Institute for Applied Physics, Wien, Austria — 4EPFL, Lausanne, Switzerland — 5IPP CAS, Prague, Czech Republic — 6See author list of U. Stroth et al. 2022 Nucl. Fusion 62 042006 — 7See author list of B. Labit et al. 2019 Nucl. Fusion 59 086020
In December 2021, the shattered pellet injection (SPI) system was successfully installed on the tokamak ASDEX Upgrade (AUG). Hereby, large amounts of material are injected into the plasma, radiating strongly and thereby spreading the previously confined energy over a larger area in comparison to unmitigated disruptions. The AUG SPI system allows a large variation in pellet parameters – such as pellet size, velocity or composition – and different shatter geometries. The ultimate goal is to assist the design of the ITER disruption mitigation system (DMS). In the 2022 campaign at ASDEX Upgrade around 240 discharges were performed for the SPI experiments. Different shatter heads were installed at the end of each of the three independent guide tubes. The focus of the analysis presented here is to find the optimal pellet parameters and shatter geometries for maximizing the radiated energy, while reducing localized heat loads.