Status of COHERENT multi-ton, NaI detector array, NaIvETe

The suite of detectors in the COHERENT experimental program are designed for low-threshold measurements of low-energy recoil signals from Coherent Elastic Neutrino (ν) Nucleus Scattering (CEvNS). The goal is to measure CEvNS on a range of nuclei to investigate the Standard Model prediction of the cross-section dependence on neutron number squared that puts limits on non-standard interactions. In addition, CEvNS plays an important role in supernova dynamics. The multi-ton NaI neutrino detector, NaIvETe, provides the smallest neutron number target material in COHERENT, Na-23 and an opportunity for a measurement on I-127, separate from previous CsI results. The first of 5 detector modules was deployed in summer 2022 at the Oak Ridge National Laboratory (ORNL) Spallation Neutron Source (SNS), where neutrinos are produced as a byproduct of the spallation process. Two detector modules were deployed in summer 2023 with all three measuring the low-energy CEvNS signal from scattering on Na. The NaIvETe detector is designed to simultaneously measure inelastic, charged-current (CC) signals from scattering on I-127, which depends on the g_A coupling at momentum transfer of interest to neutrino-less double beta decay calculations. Recent results from the COHERENT 185 kg NaI detector indicate a cross section that is less than theoretical predictions. Initial analysis of low-energy signals and plans for the last two modules will be presented including preparation for measuring the high-energy, CC signals.