Neutrino flux measurement at SNS/ORNL with a heavy-water detector*

The development and implementation of the new 592 kg heavy-water Cherenkov neutrino detector will allow for exciting new advancements in neutrino research. For instance, the neutrino-oxygen charged-current cross section will be experimentally measured for the first time, in addition to measuring the theoretically well-known deuteron cross section at energies below 50MeV. Results will also provide better understanding of other neutrino cross section and improve sensitivity on exploring new physics. With the assembly phase beginning in early 2022, this detector will be deployed in the "Neutrino Alley" in the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. Located about 20 m from the target, this detector will normalize the neutrino flux at the SNS, currently known up to 10% uncertainty in pion decay models. This detector will greatly lower our uncertainties on neutrino flux (lower than 5% in 2 years), which is important for all other COHERENT detectors (past, present, and future) deployed in the Neutrino Alley.