Shortly after the proposal in 1964 that a 37Cl solar
neutrino experiment was feasible, three of the people most involved
were photographed in front of a small version of the chlorine tank.
From right to left, they are: Raymond Davis, Jr., John Bahcall, and
Don Harmer. (The photograph, courtesy of Raymond Davis, Jr., appeared
in Mercury, March/April 1990.)
Ray Davis (circa 1966) with a quizzical look, as if I had
just told him that I made a factor of four pi error in calculating
the cross section for neutrino absorption with his detector.
The picture was taken in the Homestake mine, shortly
before the experiment began operating.
The photograph is reproduced from J. N. Bahcall, ``Solar
Neutrinos,'' Proc. 2nd Int. Conference on High-Energy Physics and
Nuclear Structure, 1967, pp. 232-255, ed. G. Alexander (North Holland,
Amsterdam).
Ray Davis (also circa 1966) with a young assistant (John).
The picture was taken in the Homestake mine, shortly
before the experiment began operating.
The photograph is reproduced from J. N. Bahcall, ``Solar
Neutrinos,'' Proc. 2nd Int. Conference on High-Energy Physics and
Nuclear Structure, 1967, pp. 232-255, ed. G. Alexander (North Holland,
Amsterdam).
Close up next to Ray's tank.
This picture was taken at the same time (circa 1966) as the two
previous photographs. (The photograph appears here courtesy of
Ray Davis.)
Inspecting the pumps. R. Davis, Jr. (in the doorway) enters the
room to inspect the newly installed gas circulation pumps;
G. Friedlander (kneeling) is shown holding a wrench. The photograph
is by courtesy of Brookhaven National Laboratory (circa 1967) and is
taken from Figure 10.4 of Neutrino Astrophysics.
The 37Cl neutrino detector is a tank containing
100,000 gallons of perchloroethylene in the cavity 4,850 feet below
ground in the Homestake Mine in Lead, S.D. R. davis, Jr., principal
scientist of the 37Cl experiment, is leaning on the catwalk
above the tank and J. Galvin, expert technician, is standing below.
The photograph is by courtesy of the Brookhaven National Laboratory
(circa 1967) and is taken from Figure 10.3 of Neutrino AstrophysicsNeutrino Astrophysics.
Three of the first solar neutrino researchers. From left to right:
G. T. Zatsepin (founder of the Soviet solar neutrino experiment and
honorary mayor of Neutrino City in the North Caucus region). John
Bahcall, and Ray Davis, Jr., Leningrad, 1974. (The photograph, courtesy of
John Bahcall, appeared in Mercury, March/April 1990.)
John Bahcall and Ray Davis at a meeting of the American
Astronomical Society in Tucson, Arizona, January 1995.
At this meeting Ray Davis received the Tinsley Prize of the Society
and John Bahcall received the Heineman Prize. The picture appeared in
a Science Watch interview article by Simon Mitton (September 1995).
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