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Hyper-Kamiokande is a neutrino observatory being constructed on the site of the Kamioka Observatory, near Kamioka, Japan.

The project started in 2010 as a successor to Super-Kamiokande. It was ranked as among the 28 top priority projects of the Japanese government. Thirteen countries from three continents are involved in this program.[1]

Construction was given final approval on 13 December 2019.[2] Mass production of the photomultiplier tube detectors began in 2021.[3] Construction of the access tunnel was completed on February 25, 2022.[4] The beginning of data-taking is planned for 2027.[5]

Hyper-Kamiokande will have a tank with a billion litres of ultrapure water (UPW), 20 times larger than the tank for Super-Kamiokande. This increased capacity will be accompanied by a proportional increase in the number of sensors. The tank for Hyper-Kamiokande will be a double cylinder 2 × 250 meters long, always approximately 40 × 40 meters, and buried 650 meters deep[6] to reduce interference from cosmic radiation.

Among the scientific objectives will be the search for proton decays.[2][7] Super-Kamiokande put a lower bound on the proton's half life of around 1034 years, which is enough to rule out some Grand Unified Theories (GUTs) such as SU(5); Hyper-Kamiokande will allow for a lower bound of around 1035, enabling other GUT candidates to be tested.[2][7]


Bibliography



References


  1. Normile 2015.
  2. Castelvecchi, Davide (2019). "Japan will build the world's largest neutrino detector". Nature. doi:10.1038/d41586-019-03874-w. PMID 33318697. S2CID 214355319.
  3. Itow, on behalf of the Hyper-Kamiokande Collaboration, Y. "Construction status and prospects of the Hyper-Kamiokande project". POS Volume 395 - 37th International Cosmic Ray Conference (ICRC2021). Proceedings of Science.
  4. "The excavation of the access tunnel has been completed". Hyper-Kamiokande--latest news. Retrieved 14 April 2022.
  5. "The Hyper-Kamiokande project is officially approved". 12 February 2020.
  6. "Japan decides to build next underground neutrino detector - The Mainichi". Archived from the original on 2019-08-21.
  7. "Proton Decay Searches: Hyper-Kamiokande". www.hyper-k.org. Retrieved 22 September 2020.



На других языках

[de] Hyper-Kamiokande

Hyper-Kamiokande ist ein in Planung befindliches Neutrinoobservatorium, das auf dem Gelände des Kamioka-Observatoriums in der Nähe von Kamioka, Japan, errichtet wird.
- [en] Hyper-Kamiokande

[ru] Гипер-Камиоканде

«Гипер-Камиоканде» (Hyper-Kamiokande, Hyper-K) — японский нейтринный детектор, строящийся недалеко от Хиды.


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