Abstract
Hyper-Kamiokande (HK) is a next generation neutrino detector, planned to start operation in 2027. Its main physics goals include precise measurements of neutrino oscillation parameters and investigations of the Grand Unified Theories. HK is an underground water Cherenkov detector, with a 68 m diameter and 71 m height cylindrical tank –approximately 8 times larger fiducial volume than Super-Kamiokande. It will be equipped with about 53,000 photo-sensors. Its front-end electronics is required to be synchronized with sub-ns precision, in order to ensure accurate timing measurements of the Cherenkov photons. We have developed a prototype system to distribute the synchronization clock with auxiliary information via optical fibers. In this paper, the design of the system, the descriptions of the developed prototype and finally the performance of the system are presented.
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