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30 May 2022 to 4 June 2022
Virtual Seoul
Asia/Seoul timezone

Development of Timing Synchronization System between Neutrino Beamline and Large Water Cherenkov Detector; Hyper-Kamiokande Experiment

Not scheduled
Virtual Seoul

Virtual Seoul

Poster New neutrino technologies Poster


Shota Izumiyama (Tokyo Institute of Technology)


The Hyper-Kamiokande experiment (HK) is a complex of an intense neutrino beam facility, J-PARC, and a large water Cherenkov detector, HK. It covers wide physics goals, for instance, precise measurements of neutrino oscillation, proton-decay search, and supernovae neutrino detection. The neutrino detector HK will be equipped with 20,000 PMT of 50 cm diameter, whose timing resolution is 1 ns and doubly improved from past models. In order to achieve precise event reconstruction, we require the electronics of HK to be synchronized within the sub-ns resolution, including the timing resolution of the digitizers themselves. In addition, it is required to have synchronization of 10-ns level between the beamline and the detector, which are about 300 km apart.
The electronics system for HK is now in the R&D phase, and several groups are working in parallel to explore various technologies related to its implementation. This poster will present the performance of a timing synchronization system that is based on the concepts currently implemented in the T2K and the Super-Kamiokande experiments. We will discuss reference clock generation using several atomic clocks synchronized by the GNSS receivers, including an evaluation of the stability of the reference clock; method of synchronization among distant places, using the special GPS receiver, which uses the common view method and information provided by the Japanese institute, NICT; system test of the slow-control endpoint in the QTC/TDC digitizer, which uses communication via the timing link consisting of two optical fibers: one for a 125 MHz clock and one for serial data.

Collaboration Hyper-Kamiokande Collaboration

Primary author

Shota Izumiyama (Tokyo Institute of Technology)


Yousuke Kataoka (University of Tokyo, Institute for Cosmic Ray Research, Kamioka Observatory) Yasuhiro Takemoto (University of Tokyo, Institute for Cosmic Ray Research, Kamioka Observatory) Yoshinari Hayato (University of Tokyo, Institute for Cosmic Ray Research, Kamioka Observatory) Kotaro Terada (Tokyo Institute of Technology) Yohei Yamaguchi (Tokyo Institute of Technology) Masahiro Kuze (Tokyo Institute of Technology)

Presentation Materials