Operations of the DUNE ND-LAr 2x2 Demonstrator

The Deep Underground Neutrino Experiment (DUNE) will be a next-generation long-baseline neutrino experiment that seeks to precisely measure the parameters that govern the phenomena of neutrino oscillations. As part of DUNE's near detector complex, the liquid Argon near detector (ND-LAr) will have a modular liquid Argon time projection chamber (LArTPC) consisting of 35 optically separated modules, with a novel pixel-based charge readout electronics, which will be exposed to a high-intensity neutrino beam. The ND-LAr 2x2 Demonstrator is a prototype of DUNE ND-LAr consisting of 4 LArTPC modules on a 2x2 array, installed 100 meters underground, on-axis of the 6 GeV NuMI neutrino beam at Fermilab. This prototype's goal is to demonstrate the capabilities of a modular LArTPC detector in a high-intensity neutrino beam. During its first run in July 2024, the 2x2 Demonstrator collected 5 days of neutrino beam data. This talk will cover the 2x2 Demonstrator experimental setup and detail the lessons learned during commissioning, operations, and ongoing calibration efforts.