The Deep Underground Neutrino Experiment (DUNE) is a next-generation neutrino oscillation experiment designed to observe CP violation in the lepton sector, determine the neutrino mass ordering, and precisely measure the oscillation parameters \(\delta _{CP}\) , \(\theta _{13}\) , \(\theta _{23}\) and the magnitude of \(\Delta m^{2}_{32}\) . This physics program will be a major contribution to the completion of the three-flavour neutrino mixing model. In addition, there is a wider physics program that includes the observation of supernovae neutrinos, proton decay detection and beyond-standard model (BSM) physics searches [1]. DUNE will make use of massive liquid argon time projection chamber (LArTPC) detectors and the world’s most intense neutrino beam in order to achieve these physics goals. This chapter first explains the workings of LArTPC technology before summarising the three main components of DUNE: the beam production facility, the far detector (FD) and the near detector (ND). Finally, this chapter discusses the Precision Reaction Independent Spectrum Measurement (PRISM) and the data used in the physics analysis presented in this thesis.