Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 81: Neutrino Physics VI

T 81.3: Vortrag

Donnerstag, 3. April 2025, 16:45–17:00, VG 3.103

The Monte Carlo Simulation of JUNO's pre-detector OSIRIS — •Lukas Bieger, Dhanushka Bandara, Silvia Cengia, Adrian Keiderling, Florian Kirsch, Tobias Lachenmaier, Anurag Sharma, and Tobias Sterr — Eberhard Karls Universität Tübingen, Physikalisches Institut

The Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose neutrino experiment with a 20 kt liquid scintillator detector in the final phase of construction in southern China. Its primary objective is to determine the neutrino mass hierarchy by precisely measuring the oscillated energy spectrum of electron antineutrinos from nearby nuclear power plants. The Online Scintillator Internal Radioactivity Investigation System (OSIRIS) will monitor the radio-purity of the liquid scintillator during the filling of JUNO, to ensure that the required contamination levels are met. OSIRIS itself is a 18 t liquid scintillator detector, instrumented with 64 20-inch PMTs to collect the light produced by events in the detector's sensitive volume. A precise Monte Carlo simulation is essential for understanding the detector's performance and optimizing analysis methods. This talk will present the comprehensive simulation framework developed for OSIRIS and will discuss the agreement of the simulation output with respect to source calibration data. Furthermore, ongoing MC tuning using calibration data to improve the accuracy is reported. This work is supported by the Deutsche Forschungsgemeinschaft.

Keywords: OSIRIS; JUNO