Speaker
Description
The construction of the next-generation far detector Hyper-Kamiokande (HK) has started. It will have ten times larger fiducial volume and increased detection performances. The data taking is planned for 2027. Time stability is crucial, as detecting physics events relies on reconstructing Cherenkov rings based on the coincidence between the photomultipliers. The above requires a timebase jitter smaller than 100 ps. In addition, a universal time reference with a precision of less than 100ns is needed to time stamp neutrino events from both J-PARC and astrophysical sources.
The HK collaboration is in an R&D phase and several groups are working in parallel, exploring various solutions for the electronics system. This poster will present the studies related to a new proposal for the time synchronization system. The discussed items will include: clock generation, including the connection scheme between the GNSS receiver (Septentrio) and the atomic clock (free-running Rubidium); precise calibration of atomic clock and algorithms to correct errors on satellites orbits; redundancy of the system; and a two-stage distribution system that sends the clock encoded in the data stream, using a custom protocol.
| Collaboration | Hyper-Kamiokande |
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