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COHERENT 2018 at the Spallation Neutron Source

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arxiv 1803.09183 v2 pith:7PJXLXOY submitted 2018-03-24 physics.ins-det hep-exnucl-ex

classification physics.ins-dethep-exnucl-ex
keywords coherentcollaborationsourcecevnsdetectorphysicsdetectorsfour
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

The primary goal of the COHERENT collaboration is to measure and study coherent elastic neutrino-nucleus scattering (CEvNS) using the high-power, few-tens-of-MeV, pulsed source of neutrinos provided by the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). The COHERENT collaboration reported the first detection of CEvNS [Akimov:2017ade] using a CsI[Na] detector. At present the collaboration is deploying four detector technologies: a CsI[Na] scintillating crystal, p-type point-contact germanium detectors, single-phase liquid argon, and NaI[Tl] crystals. All detectors are located in the neutron-quiet basement of the SNS target building at distances 20-30 m from the SNS neutrino source. The simultaneous measurement in all four COHERENT detector subsystems will test the $N^2$ dependence of the cross section and search for new physics. In addition, COHERENT is measuring neutrino-induced neutrons from charged- and neutral-current neutrino interactions on nuclei in shielding materials, which represent a non-negligible background for CEvNS as well as being of intrinsic interest. The Collaboration is planning as well to look for charged-current interactions of relevance to supernova and weak-interaction physics. This document describes concisely the COHERENT physics motivations, sensitivity, and next plans for measurements at the SNS to be accomplished on a few-year timescale.

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  1. Demonstration of the light collection stability of a PEN-based wavelength shifting reflector in a tonne scale liquid argon detector

    physics.ins-det 2024-11 conditional novelty 6.0 of 10

    A tonne-scale liquid argon detector instrumented with 4 m^2 of PEN wavelength-shifting reflector shows no light-yield deterioration over 12 days.

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