Construction of the Intermediate Water Cherenkov Detector (IWCD) for Hyper-Kamiokande (HK) is smoothly going on in Tokai, Ibaraki. Excavation of the vertical shaft is about to begin.
The steel cutting ring at the base of the shaft structure has been completed. As soil is excavated beneath it, the huge structure gradually sinks into the ground.
The long-baseline neutrino oscillation experiment of the HK project, co-hosted by KEK and the University of Tokyo, uses neutrino beams produced at J-PARC to address a fundamental question:
How is the universe made of matter, and not antimatter?
IWCD is a crucial detector that observes the properties of neutrinos at the point close to their production before they are changed by neutrino oscillations.
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