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Original Brookhaven Neutrino Experiment
This 1963 photo shows the first detector located in a limestone mine in Barberton, Ohio, 2,300 feet below ground surface. This experiment established the techniques used in the much larger Homestake mine detector.
of the Homestake Mine tank
This 1966 photo shows the construction of the tank used in the solar neutrino experiment in the Homestake gold mine. The tank, 20 feet in diameter and 48 feet long, held 100,000 gallons of perchloroethylene and was located 4,900 feet below ground surface.
In 1964, Chemistry Department Administrator Blair Munhofen uses Brookhaven Lab's swimming pool to test the prototype eductors eventually used in Davis's Homestake Mine neutrino detector. Submerged in the tank, the eductors served to mix helium with the perchloroethylene used in the experiment.
Mine Neutrino Experiment
The Homestake mine tank, 20 feet in diameter and 48 feet long, held 100,000 gallons of perchloroethylene and was located 4,900 feet below ground surface.
of Neutrino Experiment
A three-quarter view diagram of the Brookhaven Solar Neutrino Experiment in Lead, South Dakota.
of Neutrino Experiment
A schematic diagram of the Brookhaven Solar Neutrino Experiment in Lead, South Dakota.
Swim in the Mine
In 1971 Raymond Davis Jr. takes a dip in the water surrounding the perchloroethylene tank deep within the Homestake Mine. At nearly a mile beneath the ground, the scientists suffered through 90 degree heat for upwards of 12 hours a day. The 300,000 gallons of water surrounding the tank reduced background radiation which could interfere with counting.
In this 1969 photo, Raymond Davis (center) is flanked by co-researchers Raymond (Dutch) Stoenner and Warren Lyman as they take a close-up look at a large moon rock returned to Earth by Apollo 11. Davis, Stoenner, and Lyman studied the moon rock for traces of radioactive gases, like argon-37, that would help them determine how long the rock had been exposed to cosmic rays.
A 1978 portrait of Dr. Davis.
Raymond Davis Jr.
A 2002 portrait of Dr. Davis.