OscSNS

The OscSNS detector design is similar in design to the MiniBooNE detector at Fermilab with the exception of being cylindrical instead of spherical and having a higher phototube coverage and the addition of butyl- PBD scintillator to the mineral oil, as was done in LSND. The detector consists of a 20.5 m long by 8 m diameter cylindrical tank lined with 8-in phototubes at a radius of 3.5 m (3900 detector phototubes, corresponding to 25% coverage, and 390 veto phototubes, corresponding to 2.5% coverage) and filled with 886 tonnes of mineral oil (density =0.86), corresponding to a fiducial volume of 450 tonnes. Approximately 0.031 g/l (∼ 30 kg) of butyl-PBD scintillator will be added to the mineral oil in order to increase the light output of low-energy particles and provide neutron detection.

The center of the OscSNS detector is located 60 m from the Hg beam dump, in the backward direction. By placing OscSNS somewhat upstream of the beam dump, the decay-in-flight neutrino background to the neutrino oscillation measurement will be negligible. The OscSNS detector will be buried under 6 m of dirt (or 2 m of steel) overburden in order to provide shielding from cosmic rays and beam-induced neutrons. New electronics are being designed for OscSNS that will use ADCs with a faster clock speed than were used in LSND and MiniBooNE (200 MHz versus 10 MHz ).