Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 47: Experimental techniques in astroparticle physics II
T 47.9: Talk
Tuesday, March 16, 2021, 18:00–18:15, Tv
Calibrating OSIRIS: A 20-ton radioactivity monitor for JUNO — •Alexandre Sébastien Göttel1,2, Philipp Kampmann1, Runxuan Liu1,2, Livia Ludhova1,2, Luca Pelicci1,2, Mariam Rifai1,2, Giulio Settanta1, and Cornelius Vollbrecht1,2 — 1Forschungszentrum Jülich - Institute for Nuclear Physics, IKP-2, Jülich, Germany — 2RWTH Aachen University - Physics Institute III B, Aachen, Germany
The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kt liquid scintillator reactor neutrino experiment being built in the Guangdong province in China. JUNO is a multi-purpose experiment with a wide range of applications in neutrino physics, ranging from a mass-hierarchy determination to solar, geo, and atmospheric neutrino measurements, to detecting supernovae, etc.. For many of these applications it is imperative to closely monitor the radiopurity of the liquid scintillator during the several months it will take to fill the detector. The Online Scintillator Internal Radioactivity Investigation System (OSIRIS), a 20-ton liquid scintillator detector, is being developed for this purpose and will be built in Jiangmen in 2021. In order for the OSIRIS pre-detector to achieve its goals a rigorous calibration is necessary. This calibration will consist of the lowering of radioactive sources, as well as a fast-pulsed LED, directly inside of the liquid scintillator using a fully automated and sealed calibration unit which was previously used in the Daya Bay experiment. In this talk the methods used for this calibration are discussed, as well as how they were optimized beforehand using a GEANT4-based Monte Carlo simulation.