Abstract
Abstract
This study evaluates more than 4,000 tiles made of Hamamatsu
visual-sensitive silicon photomultipier (SiPM), each with dimensions
of 5 × 5 cm2, intended for the central detector of the
Taishan Anti-neutrino Observatory (TAO), a satellite experiment of
the Jiangmen Underground Neutrino Observatory (JUNO) aimed at
measuring the reactor anti-neutrino energy spectrum with
unprecedented energy resolution. All SiPM tiles underwent a room
temperature burn-in test in the dark for two weeks, while cryogenic
testing analyzed the thermal dependence of parameters for some
sampled SiPMs. Results from these comprehensive tests provide
crucial insights into the long-term performance and stability of the
10 square meters of SiPMs operating at -50°C to detect
scintillation photons in the TAO detector. Despite some anomalies
awaiting further inspection, all SiPMs successfully passed the
burn-in test over two weeks at room temperature, which is equivalent
to 6.7 years at -50°C. Results are also used to guide
optimal SiPM selection, configuration, and operation, ensuring
reliability and sustainability in reactor neutrino
measurements. This work also provides insights for a rapid and
robust quality assessment in future experiments that employ
large-scale SiPMs as detection systems.
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