Towards a Precision CEvNS Measurement with a Tonne-Scale Liquid Argon Detector

Precision measurements of coherent elastic neutrino-nucleus scattering (CEvNS) will allow a broad collection of physics studies ranging from improving constraints on non-standard neutrino interactions to probing nuclear structure. A CEvNS detector near a spallation target also provides the opportunity to search for light accelerator-produced dark matter. Such studies require large-scale low-threshold detectors. To that end, the COHERENT collaboration has designed a 750~kg liquid argon (LAr) scintillation detector to deploy at the Spallation Neutron Source at Oak Ridge National Laboratory. The detector is designed to achieve the 20~keVnr threshold needed for efficient detection of nuclear recoils. In this talk I will present the experimental design and discuss the expected physics sensitivity of this detector, as well as outline the ongoing R\&D to further improve the light collection for future CEvNS studies with LAr.