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T: Fachverband Teilchenphysik
T 81: Neutrino Physics VI
T 81.9: Vortrag
Donnerstag, 3. April 2025, 18:15–18:30, VG 3.103
Liquid Handling System of the OSIRIS detector — •Oliver Pilarczyk1, Manuel Böhles1, Marcel Büchner1, Daniela Fetzer1, Arshak Jafar1, Tobias Sterr1, and Michael Wurm2 — 1JGU Mainz — 2Universität Tübingen
The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kt liquid scintillator experiment currently under construction in Jiangmen (China). Its main scientific goal is to determine the neutrino mass ordering by measuring electron antineutrinos from two nearby nuclear power plants at a distance of ~53 km. To achieve this goal the liquid scintillator has to go through several purification plants to make sure it meets the optical and radiopurity requirements. The 20t OSIRIS pre-detector is the last device behind these purification plants close to the main JUNO detector. Its task is to monitor the radiopurity of the purified scintillator before it is filled in the JUNO detector. Currently OSIRIS is operated in batch-mode to qualify the purity of scintillator samples and its own experimental sensitivity but will be run in continuous mode during JUNO filling, which means that parts of the scintillator from the main filling line will be redirected into a bypass in which the OSIRIS detector is placed and then returned to the main filling line. To ensure every batch of the scintillator stays about 24h inside OSIRIS a temperature gradient can be established to help stratification of the liquid scintillator inside the detector. This talk covers the operations and results from the commissioning phase of the OSIRIS detector. The work is supported by the DFG Research Unit 'JUNO' (FOR5519) and the Cluster of Excellence PRISMA+.
Keywords: OSIRIS; JUNO