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A.B. McDonald (Queen's University, Kingston, Ont., Canada), SNO Collaboration
The Sudbury Neutrino Observatory (SNO) is a 1,000 tonne heavy water Cerenkov detector situated 2,000 meters underground in INCO's Creighton mine near Sudbury, Ontario, Canada. The project is a Canadian, US and UK collaboration. Through the use of heavy water SNO will be able to detect a number of neutrino reactions, including one sensitive specifically to solar electron neutrinos and another to all active neutrino types. With these two reactions the detector will be able to search for neutrino flavor change without the requirement of electron neutrino flux normalization by solar model calculations. It will have a relatively high counting rate, on the order of 10 per day for solar neutrinos, and will also provide unusual sensitivity for measurements of other solar neutrino properties, atmospheric neutrinos and suprenova neutrinos. For supernova neutrinos, SNO will have high sensitivity for muon and tau neutrinos and anti-neutrinos as well as specific sensitivity for electron neutrinos and anti-neutrinos. It will have excellent timing and moderate directional sensitivity. The observatory has been in almost continuous operation since May, 1999.
SNO Collaboration: Queen's University, University of British Columbia, CRPP at Carleton University, University of Guelph, Laurentian University, Brookhaven National Laboratory, Lawrence Berkeley National Laboratory, Los Alamos National Laboratory, University of Pennsylvania, University of Washington, Oxford University.
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