SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 94: DAQ, Exp. Methods

T 94.2: Vortrag

Mittwoch, 22. März 2023, 17:45–18:00, POT/0106

Event builder and online monitoring of OSIRIS pre-detector of JUNO — •Runxuan Liu1,2, Kai Loo4, Livia Ludhova1,2, Cornelius Vollbrecht1,2, Anita Meraviglia2,3, Nikhil Mohan2,3, Luca Pelicci1,2, Mariam Rifai1,2, and Apeksha Singhal1,21Forschungszentrum Jülich GmbH, Institut für Kernphysik IKP-2, Jülich, Germany — 2III. Physikalisches Institut B, RWTH Aachen University, Aachen, Germany — 3GSI Helmholtz Centre for Heavy Ion Research, Darmstadt, Germany — 4Cluster of Excellence PRISMA+, Johannes Gutenberg University Mainz, Mainz, Germany

JUNO is a 20 kt liquid scintillator detector under construction in Jiangmen, China. The installation is expected to be completed in 2023. Its main goal is to determine the neutrino mass hierarchy with the measurement of reactor anti-neutrinos from the two nuclear power plants in the proximity. This requires stringent limits on the radiopurity of the liquid scintillator. The OSIRIS (Online Scintillator Internal Radioactivity Investigation System) pre-detector is designed to monitor the liquid scintillator during the several months of filling the large volume of JUNO. OSIRIS will contain 18 tons of scintillator and will be equipped with 76 20-inch PMTs. It will be sensitive for the 238U/232Th decay rates via tagging of the Bi-Po coincidence decays in the 238U/232Th decay chain. This talk will present the trigger strategies of OSIRIS and its updated event builder software. The online monitoring software for OSIRIS is needed for a live measurement of scintillator radiopurity during filling and it will also be presented in this talk.

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