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Expression of Interest: The Atmospheric Neutrino Neutron Interaction Experiment (ANNIE)

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arxiv 1402.6411 v1 pith:LAZOKDPH submitted 2014-02-26 physics.ins-det hep-ex

classification physics.ins-dethep-ex
keywords neutrinoneutronwateratmosphericannieexperimentinteractioncherenkov
verification ladder T0 review T1 audit T2 compute T3 formal
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Neutron tagging in Gadolinium-doped water may play a significant role in reducing backgrounds from atmospheric neutrinos in next generation proton-decay searches using megaton-scale Water Cherenkov detectors. Similar techniques might also be useful in the detection of supernova neutrinos. Accurate determination of neutron tagging efficiencies will require a detailed understanding of the number of neutrons produced by neutrino interactions in water as a function of momentum transferred. We propose the Atmospheric Neutrino Neutron Interaction Experiment (ANNIE), designed to measure the neutron yield of atmospheric neutrino interactions in gadolinium-doped water. An innovative aspect of the ANNIE design is the use of precision timing to localize interaction vertices in the small fiducial volume of the detector. We propose to achieve this by using early production of LAPPDs (Large Area Picosecond Photodetectors). This experiment will be a first application of these devices demonstrating their feasibility for Water Cherenkov neutrino detectors.

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