The Deep Underground Neutrino Experiment (DUNE) Far Detector Interim Design Report Volume 3: Dual-Phase Module

The DUNE dual-phase (DP) detector module aims to open new windows of opportunity in the study of neutrinos, a goal it shares with the SP module. DUNE’s rich physics program, with discovery potential for charge parity (CP) in the neutrino sector, and its capability to make signif- icant observations of nucleon decay and astrophysical events, is enabled by the great resolution of the LArTPC detector technique, which the DP design further augments. This design improves the signal to noise ratio in the charge readout, lowering the threshold for the smallest observable signals while also achieving a finer readout granularity. The DP technology enables the construction of larger drift volumes, thereby reducing the quantity of nonactive materials in the LAr. Although the physics requirements are identical for both the SP and DP designs, some aspects of the DP design offer augmented performance.