The Deep Underground Neutrino Experiment (DUNE) at the Long Baseline Neutrino Facility (LBNF) will measure neutrino oscillations of a muon neutrino beam generated at Fermi National Accelerator Laboratory (FNAL) with a array of giant liquid argon detectors located 1300km away and deep underground at the Sanford Underground Research Facility (SURF) in South Dakota.
Below, shows the infrastructure planned to generate the muon neutrino beam at FNAL.
The figure below shows the location at SURF where a phased deployment of four, 10 kt (fiducial) volume, liquid argon detectors will happen. The first 10 kt detector deployment is planned for around 2023.
A primary goal of the DUNE physics programme is to provide definitive answers to two outstanding questions in neutrino physics:
- Is CP-violation present in the neutrino sector?
- What is the mass hierachy of the three neutrino mass states?
The performance of DUNE depends on the exposure in detector mass (kt) x beam power (MW) x time (years) where 300 kt.MW.year corresponds to 7 years running with a 10 kt detector and a beam power of 1.07 MW. The mass hierarchy will be measured at 5 σ with an exposure of 230 kt.MW.year whereas CP-violation can be measured at 3 σ (for 75% of all CP phase values) with an exposure of 850 kt.MW.year. The plot below shows how this sensitivity translates into a 1 σ resolution on the CP-phase as a function of exposure (the shaded region presents the range in sensitivity due to variations in the beam design).
More details of the physics sensitivity of DUNE can be found in the DUNE Conceptual Design report.