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Evaluation of the upgraded 3-inch Hamamatsu photomultiplier for the KM3NeT Neutrino Telescope

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arxiv 2504.02989 v3 pith:2QTRM3HA submitted 2025-04-03 hep-ex astro-ph.IMphysics.ins-det

classification hep-exastro-ph.IMphysics.ins-det
keywords betterefficiencyhamamatsuinchkm3netmodelneutrinophotomultiplier
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The 3-inch Hamamatsu R14374-02 photomultiplier tube is an improved version of the R12199-02 model and its successor in the construction of the KM3NeT neutrino telescope. A total of 1000 photomultipliers were analysed to assess their dark count rate, transit time spread, and spurious pulses. A subset of 200 photomultipliers were further evaluated to determine their quantum efficiency which is an essential parameter for Monte Carlo simulations of the detector response. The measurements show that R14374-02 model has better quantum efficiency homogeneity over the photocatode and better time properties than the R12199-02.

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  1. A Cost Effective Optimization of the hybrid-DOM Design for TRIDENT

    hep-ex 2025-07 conditional novelty 5.0 of 10

    Simulations show the 19-PMT, 4-inch hDOM for TRIDENT can match or exceed the 31-PMT, 3-inch design on neutrino efficiency and reconstruction, provided the 4-inch PMTs achieve comparable quantum efficiency and timing.

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