Speakers
Description
The Jiangmen Underground Neutrino Observatory (JUNO) aims to determine the neutrino mass ordering and perform precision measurements of neutrino oscillation parameters. Its central detector consists of a 35.4-m-diameter acrylic sphere holding 20 kton of liquid scintillator, immersed in a 44-m-deep water pool for radioactive shielding and a water Cherenkov muon veto. Cosmogenic neutrons, generated by muons traversing the detector, are a valuable source for detector calibration. However, their selection is complicated by contamination from after-pulses induced by preceding high-energy muons. This poster presents the strategy for selecting cosmogenic neutrons for calibration, including the identification and removal of fake events caused by after-pulses, online event classification, offline event selection, and calibration of detector light yield evolution over time.