Deployment of COHERENT multi-tonne NaI[Tl] detector (NaIvETE)

The COHERENT collaboration operates a multi-target suite of low-threshold neutrino detectors at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. These detectors are uniquely equipped to observe the dominant low-energy (E_ν ~ tens of MeV) interaction of coherent elastic neutrino-nucleus scattering (CEvNS). CEvNS is a neutral-current process whose only experimental signal is scintillation from nuclear recoils of mere tens of keV. One characteristic of the Standard Model cross section for CEvNS is its dependence on the number of neutrons squared. In order to probe this N² scaling with the relatively light ²³Na nucleus, COHERENT will deploy a tonne-scale detector with scintillating NaI[Tl] crystals, a successor to the NaIvE detector. We will present the progress on construction and 2022 deployment for the NaI Neutrino Experiment TonnE-scale (NaIvETE).