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

摘要

The COHERENT collaboration is deploying a suite of low-energy detectors in alow-background corridor of the ORNL Spallation Neutron Source (SNS) to measurecoherent elastic neutrino-nucleus scattering (CEvNS) on an array of nucleartargets employing different detector technologies. A measurement of CEvNS ondifferent nuclei will test the $N^2$-dependence of the CEvNS cross section andfurther the physics reach of the COHERENT effort. The first step of thisprogram has been realized recently with the observation of CEvNS in a 14.6 kgCsI detector. Operation and deployment of Ge and NaI detectors are alsounderway. A 22 kg, single-phase, liquid argon detector (CENNS-10) starteddata-taking in Dec. 2016 and will provide results on CEvNS from a lighternucleus. Initial results indicate that light output, pulse-shapediscrimination, and background suppression are sufficient for a measurement ofCEvNS on argon.