Volume 444 -
38th International Cosmic Ray Conference (ICRC2023) -
Neutrino Astronomy & Physics (NU)
Long-term performance and its stability of Hyper-Kamiokande PMTs in the SK water tank from 2018 to present
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Pre-published on:
August 18, 2023
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Abstract
For the Hyper-Kamiokande experiment, a new 50 cm Box & Line type PMT (HAMAMATSU R12860: HK-PMT) has been developed. Using PMT dark hit data taken for 129 HK-PMTs, which have been installed in Super-Kamiokande since 2018, long-term measurements of the gain variation of the HK-PMTs in the water were performed for the first time. As a result, we observed a gain increase of +0.79±0.03%/year for HK-PMT.
DOI: https://doi.org/10.22323/1.444.1167
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.