PoS - Proceedings of Science
Volume 449 - The European Physical Society Conference on High Energy Physics (EPS-HEP2023) - T04 Neutrino Physics
The Top Tracker of the JUNO Experiment
D. Sandanayake*  on behalf of the JUNO collaboration
Full text: pdf
Pre-published on: January 30, 2024
Published on: March 21, 2024
The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator neutrino experiment under construction in South China; the main goal of JUNO is the direct measurement of the neutrino mass ordering using reactor antineutrinos. The main role of the Top Tracker of the JUNO Experiment is to identify and perform precision reconstruction of cosmic muons passing through the JUNO detector. This will allow the study of the contribution of the cosmogenic isotope background to the detector signal and thus decrease the related systematic error. The Top Tracker will cover about 60% of the surface area above the Water Cherenkov detector and the Central Detector and will be able to precisely track about 30% of the muons crossing the JUNO detector. A sample of well-reconstructed muon tracks provided by the Top Tracker will be used to calibrate the muon track reconstruction algorithms that use only the Central Detector information. The Top Tracker is a 3-layer array of plastic scintillator strips, re-purposed from the OPERA Target Tracker. The Top Tracker will use state-of-the-art electronics that are capable of coping with the high levels of event rate dominated by the radioactive background from the surroundings. This paper will present the Top Tracker and report its performance based on the electronics tests, calibration, and detector simulation results.
DOI: https://doi.org/10.22323/1.449.0194
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