Speaker
Description
The Jiangmen Underground Neutrino Observatory (JUNO) is currently under construction in China with its main goal to measure the neutrino mass ordering (i.e. which neutrino is lightest) using nuclear reactor antineutrinos. The main role of the Top Tracker of the JUNO Experiment is to track 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 covers about 60$\%$ of the surface area above the Water Cherenkov detector and the Central Detector, and can precisely track about 30$\%$ of the total muon flux at JUNO. Reconstruction algorithms using only the Central Detector information for track reconstruction will be trained on well-reconstructed muon tracks provided by the Top Tracker. The Top Tracker is a 3-layer array of plastic scintillator strips, re-purposed from the now de-commissioned OPERA Target Tracker. In each layer, the scintillation strips are laid in 2 perpendicular planes, to obtain 2-D track information of the passing muons. The scintillation light produced by the interaction of ionizing particles with the strips is captured by a wavelength-shifting optical fiber embedded within each strip. This signal is guided along the fibers to the multi-anode photomultiplier tubes at either end. 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 poster will present the Top Tracker and report its performance based on the electronics tests, calibration, and detector simulation results.
| Collaboration / Activity | JUNO Collaboration |
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