Characterization of a 20-inch box & line dynode photomultiplier tube

초록

The Hyper-Kamiokande, a next-generation water Cherenkov detector currently under construction and anticipated to commence its operation in 2027, is designed to advance the study of neutrino physics, CP violation, and proton decay. This study focuses on the characterization and performance verification of a 20-inch photomultiplier tube intended for deployment in the Hyper-Kamiokande detector. Key performance parameters, including gain, charge resolution, and signal-to-noise ratio, were rigorously evaluated. In addition, intrinsic noise sources such as dark current and afterpulse sources, potential sources of signal misinterpretation, were analyzed. The findings were compared with previous results to validate the measurements, ensuring the reliability of the PMT for future large-scale neutrino experiments.

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