Just submerge long strings of photomultiplier tubes into the water and watch for the Cherenkov light left behind by neutrino - generated muons. (discovermagazine.com)
Hundreds of photomultiplier tubes watch for the flashes of Cherenkov light at the bottom of Lake Baikal. (discovermagazine.com)
GHOST FINDER New results of experiments at the Daya Bay neutrino detector (walls lined with photomultiplier tubes, shown) hint at the existence of a lightweight sterile neutrino, about one - millionth the mass of an electron. (sciencenews.org)