Neutrino flux normalization via neutrino-deuteron cross section

The first heavy-water Cherenkov detector (D2O) deployed in the Spallation Neutron Source (SNS) at the Oak Ridge National Laboratory (ORNL) has been built and is currently operating in full configuration. During the summer of 2023 it collected physics data that is currently being analyzed. This detector, in combination with the second light water module, has the goal of lowering the current neutrino flux uncertainty from 10% to only 2–3%, which will impact data analysis from past, present, and future COHERENT detectors. Lowering the neutrino flux uncertainty will allow for precisely testing the Standard Model, probing non-standard neutrino interactions (NSI), looking for dark sector particles, and much more. The detector will continue to collect data for years to come. In this talk, I will present initial results of commissioning of this detector.