nuSCOPE: A monitored and tagged neutrino beam

The poor knowledge of neutrino cross sections at the GeV scale is projected to be responsible for some of the leading sources of uncertainty in next-generation oscillation experiments. The nuSCOPE experiment is based on the ideas and R&D from ENUBET and NuTAG, to build a high-precision, short-baseline neutrino experiment at CERN that employs neutrino monitoring and tagging. It allows for an exceptionally well controlled muon and electron neutrino flux, with the extraordinary capacity to reconstruct neutrino energy on an event-by-event basis. This opens up the possibility for a wealth of measurements usually reserved only for electron-scattering experiments. In this paper we describe the beamline instrumentation, demonstrating the experiment unique ability to directly measure aspects of neutrino interaction physics responsible for dominant sources of systematic uncertainty for the upcoming DUNE and Hyper-K experiments.