Information is available about solar neutrinos in the homepage of John Bahcall, a homepage about SuperKamiokande, and a homepage of the Sudbury Neutrino Observatory.
The Super-Kamiokande Observatory, the world's largest neutrino detector, was turned on during the first week of April 1996. It is more than 10 times larger than its predecessor. It contains a tank of very clear water 40 meters wide and 40 meters deep, lined with 11,200 20-inch photomultiplier tubes to pick out the radiation emitted when neutrinos collide with water molecules.