Neutron Cross Section Measurement in ProtoDUNE Single-Phase

The Deep Underground Neutrino Experiment (DUNE) is a long baseline, neutrino oscillation experiment aimed at quantifying CP violation in the neutrino sector using liquid argon as the primary detector medium. DUNE's main physics program is centered around measuring the flavor profile of a beam in neutrino and anti-neutrino modes as a function of energy both at the near and the far detector and will rely on accurate event reconstruction to do so. Understanding the detector response to neutrons will be critical for performing neutrino oscillation analyses in DUNE because they are a source of missing energy. In addition to the primary neutrons produced by the neutrino, subsequent interactions of any charged hadrons produced can result in secondary neutrons. ProtoDUNE Single-Phase sits in a testbeam and is a prototype for the DUNE far detector designed to validate technology and measure charged hadron cross sections at the relevant energies for DUNE; therefore, it is ideal for studying the secondary neutron component. This talk presents a search for neutrons produced in 1 GeV/c pion interactions and then shows a neutron inelastic cross section measurement in liquid argon using the sample of selected neutrons.