How Sudbury Works

How Sudbury Works

. Neutrinos from the Sun travel through more than 2,000 meters of rock, entering an acrylic tank containing 1,000 tons of heavy water. When one of these neutrinos interacts with a water molecule, it produces a flash of light that is detected by a geodesic array of photo-multiplier tubes. Some 7,800 tons of ordinary water surrounding the flask blocks radiation from the rock, while the overlying rock blocks energetic particles generated by cosmic rays in our atmosphere. The heavy water is sensitive to all three types of neutrinos.

Copyright 2010, Professor Kenneth R. Lang, Tufts University