Sudbury Neutrino Observatory

Sudbury Neutrino Observatory

. The central spherical flask of this neutrino observatory is 12 meters in diameter and contains 1,000 tons of heavy water so that all three types of neutrinos can be detected. The flask is surrounded by a geodesic array of 9,500 photo-multiplier (18m diameter) tubes to detect the flash of light from the interaction of a neutrino with the heavy water. (Courtesy of Kevin Lesko, Lawrence Berkeley National Laboratory.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University