The CENNS-10 Liquid Argon Detector to measure CEvNS at the Spallation Neutron Source

The COHERENT collaboration is deploying a suite of low-energy detectors in a low-background corridor of the ORNL Spallation Neutron Source (SNS) to measure coherent elastic neutrino-nucleus scattering (CEvNS) on an array of nuclear targets employing different detector technologies. A measurement of CEvNS on different nuclei will test the N2-dependence of the CEvNS cross section and further the physics reach of the COHERENT effort. The first step of this program has been realized recently with the observation of CEvNS in a 14.6 kg CsI detector. Operation and deployment of Ge and NaI detectors are also underway. A 22 kg, single-phase, liquid argon detector (CENNS-10) started data-taking in Dec. 2016 and will provide results on CEvNS from a lighter nucleus. Initial results indicate that light output, pulse-shape discrimination, and background suppression are sufficient for a measurement of CEvNS on argon.

Note:

6 pages, 8 figures. Submission to Proceedings of "LIDINE 2017: LIght Detection In Noble Elements", 22-24 September 2017, SLAC National Accelerator Laboratory. V2 in response to editors comments

scintillation counter: crystal
sodium-iodide
liquid argon
germanium: detector
nucleus: target
neutrino nucleus: coherent interaction
background: suppression
cesium: iodine
photon: yield
Oak Ridge SNS PS

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