The Deep Underground Neutrino Experiment (DUNE) is a next generation neutrino oscillation experiment. A high power wide-band beam operating in neutrino (anti-neutrino) mode will be produced at Fermilab, the flux and flavour composition will be characterised with the Near Detector. At a baseline of 1,300 km, deep underground at the Sandford Underground Research Facility (SURF, South Dakota), four gigantic Far Detector modules will measure νμ (anti-νμ) disappearance, νe (anti-νe) and ντ (anti-ντ) appearance with the goals of:
- determining the Neutrino Mass Ordering (at more than 5 sigmas)
- measure the CP Violating phase over a wide range of values
- measuring precisely the oscillation parameters
- testing the 3-flavour paradigm
The experiment is conceived to be highly sensitive to the matter effect with a long baseline of 1300 km. At this distance, DUNE will be able to unambiguously determine both the Mass Hierarchy and CP Violating phase. Thanks to the wide-band high intensity neutrino (anti-neutrino) beam from Fermilab, planned to start in 2026, DUNE will make a spectral measurement, covering both the first and second oscillation maxima as shown by the red box in the Figure (right).Both the neutrino mass ordering and CP Violating phase affect differently the amplitudes and positions of the two maxima, giving additional power to the measurement.
The DUNE Far Detector modules will be Liquid Argon Time Projection Chambers (LArTPC), each holding a fiducial mass of 10 ktons. With huge detectors deep underground, DUNE has large subsidary science program which includes the search for Nucleon Decay and the potential observation of a Galactic Core Collapse Supernova.
Liquid Argon TPCs provide a means to constructing gigantic detectors (~60m long, 12m high and 12m wide) with excellent calorimetric and spatial resolving power. The DUNE TPCs are conceived to make fine-grained 'images' of the ionization tracks from the products of neutrino interactions in the liquid argon. Two different technologies are proposed for the read-out of the drifted ionization charge, which can be measured either by induction and/or collected directly in the liquid (Single Phase detector) or after extraction and multiplication in a layer of gaseous argon (Dual Phase detector). These technologies are tested at large scale at the CERN neutrino platform (the protoDUNEs).
The prototypes are the largest liquid argon TPCs ever constructed, holding several hundreds of tonnes of liquid argon. Construction of the Single Phase ProtoDUNE was completed during 2018, and it successfully took data with a charged particle beam. This test beam data will allow characterisation of the detector response over the energy range of interest for DUNE (~0.5 to 8 GeV). ProtoDUNE Dual-Phase began operation in the fall of 2019 and data has been taken with cosmic-ray muons.
APC has been involved in the development of the dual-phase technology, participating in the 3x1x1 demonstrator and protoDUNE Dual Phase.
Liste des agents impliqués à l’APC
- CHARDONNET Etienne
- COURTY Bernard
- DAWSON Jaime
- NITTA Dariusz
- PATZAK Thomas
- PRAT Pierre
- SACERDOTI Sabrina
- TONAZZO Alessandra
- Le site du projet: http://wa105.web.cern.ch/wa105/
- Deep Underground Neutrino Experiment (DUNE): http://www.fnal.gov/pub/presspass/factsheets/pdfs/DUNE_Factsheet.pdf
- The DUNE Collaboration: https://web.fnal.gov/collaboration/DUNE/SitePages/Home.aspx