Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 48: Neutrino Physics without Accelerators 3

T 48.5: Vortrag

Dienstag, 22. März 2022, 17:15–17:30, T-H33

Liquid Handling System of the OSIRIS detector — Michael Wurm, Hans Steiger, Kai Loo, Eric Theisen, and •Oliver Pilarczyk — Johannes Gutenberg-Universität Mainz

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 antielectron neutrinos 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 on site to make sure it meets the optical and radiopurity requirements.

The 20m³ OSIRIS pre-detector is the last device behind these purification plants and will be constructed in a underground hall 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 and it will reach sensitivity levels of 10⁻¹⁶g/g on Uranium and Thorium. OSIRIS is expected to be operated in a continuous mode, 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 being send on back into the main filling line. To make sure every batch of the scintillator stays about 24 h inside the OSIRIS detector a temperature gradient will be established in the detection volume. This talk covers the operation of the Liquid Handling System (LHS) and the included Level Measurement (LM) which control and oversee the operation of OSIRIS. The development is funded by the DFG Research Unit *JUNO* (FOR2319) and the Cluster of Excellence PRISMA⁺.