This gigantic 50,000-ton “ring-imaging water cerenkov detecto”, located underground at the Kamioka Mozumi mine in japan, is used to detect “neutrinos, proton decay and cosmic rays.” Click here for first picture in gallery.

…intelligent public built the machine to detect cosmic rays: that is done using the 12′000-ish

photomultiplier tubes (extremely sensitive light detectors) visible on all walls of the ‘ultra-purified water-filled’ tank

[via deputy-dog - Tokyo]

Original post by TecheBlog Staff