| Title: |
Development of a Clock Generation and Time Distribution System for Hyper-Kamiokande |
| Authors: |
Mellet, Lucile; Guigue, Mathieu; Popov, Boris; Russo, Stefano; Voisin, Vincent |
| Contributors: |
Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Sorbonne Université Emergences MULTIPLY grant; ANR-21-CE31-0008,BERTHA,Améliorer la précision en temps pour Hyper-Kamiokande(2021) |
| Source: |
Physical Sciences Forum ; 23rd International Workshop on Neutrinos from Accelerators (NuFact2022) ; https://hal.science/hal-04402948 ; 23rd International Workshop on Neutrinos from Accelerators (NuFact2022), Jul 2022, Salt Lake City (US), United States. pp.72, ⟨10.3390/psf2023008072⟩ |
| Publisher Information: |
CCSD; MDPI |
| Publication Year: |
2022 |
| Subject Terms: |
timing; GNSS; atomic clocks; detection; neutrinos; neutrinos detection timing atomic clocks GNSS; [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] |
| Subject Geographic: |
Salt Lake City (US); United States |
| Description: |
International audience ; The construction of the next-generation water Cherenkov detector Hyper-Kamiokande (HK) has started. It will have about a ten times larger fiducial volume compared to the existing Super-Kamiokande detector, as well as increased detection performances. The data collection process is planned from 2027 onwards. Time stability is crucial, as detecting physics events relies on reconstructing Cherenkov rings based on the coincidence between the photomultipliers. The above requires a distributed clock jitter at each endpoint that is smaller than 100 ps. In addition, since this detector will be mainly used to detect neutrinos produced by the J-PARC accelerator in Tokai, each event needs to be timed-tagged with a precision better than 100 ns, with respect to UTC, in order to be associated with a proton spill from J-PARC or the events observed in other detectors for multi-messenger astronomy. The HK collaboration is in an R&D phase and several groups are working in parallel for the electronics system. This proceeding will present the studies performed at LPNHE (Paris) related to a novel design for the time synchronization system in Kamioka with respect to the previous KamiokaNDE series of experiments. We will discuss the clock generation, including the connection scheme between the GNSS receiver (Septentrio) and the atomic clock (free-running Rubidium), the precise calibration of the atomic clock and algorithms to account for errors on satellites orbits, the redundancy of the system, and a two-stage distribution system that sends the clock and various timing-sensitive information to each front-end electronics module, using a custom protocol. |
| Document Type: |
conference object |
| Language: |
English |
| Relation: |
INSPIRE: 2749345 |
| DOI: |
10.3390/psf2023008072 |
| Availability: |
https://hal.science/hal-04402948; https://hal.science/hal-04402948v1/document; https://hal.science/hal-04402948v1/file/psf-08-00072.pdf; https://doi.org/10.3390/psf2023008072 |
| Rights: |
http://creativecommons.org/licenses/by/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.AB9C0CCC |
| Database: |
BASE |