Abstract
Abstract Hyper-Kamiokande is the next generation Water Cherenkov detector that is being developed by an international collaboration as a leading worldwide experiment based in Japan. It will address the biggest unsolved questions in physics, through a multi-decade physics program that will start in the middle of the next decade. The Hyper-Kamiokande detector will be the largest underground Water Cherenkov detector in the World. It will be hosted in the Tochibora mine, about 295 km away from the J-PARC proton accelerator research complex in Tokai, Japan. A summary of an extensive R&D program related to photo-sensors and associated front-end electronics is presented. Results of studies for various candidate photo-sensors are shown, both for inner and outer detector volumes. Tested sensors include a 50 cm Hamamatsu R12860-HQE photomultiplier tube, a 50 cm Hamamatsu R12850-HQE hybrid photo-detector, a 50 cm MCP-PMT from NNVT, as well as 3” PMTs for both the multi-PMT module and for the outer detector. In addition, a brief description of the status of the protective cover design is provided. Finally, the plans and various R&D activities related to front-end electronics are summarized.
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