A giant (10-50 kt) Liquid Argon Time Projection Chamber (LAr-TPC) has been proposed as the detector for an underground observatory for the study of neutrino oscillations, neutrino astrophysics and proton decay. This detector has excellent tracking and calorimetric capabilities, much superior to currently operating neutrino detectors.
LBNO-DEMO (WA105) is a large demonstrator of the double phase LAr-TPC based on the GLACIER design, with a 666 m3 (appr. 300t) active volume. Its construction and operation test scalable solutions for the crucial aspects of this detector: ultra-high argon purity in non-evacuable tanks, long drifts, very high drift voltages, large area Micro Pattern Gas Detectors (MPGD), and cold preampliers.
The TPC will be built inside a tank based on industrial technology developed for liquefied natural gas transportation. Electrons produced in the liquid argon are extracted in the gas phase. Here, a readout plane based on Large Electron Multiplier (LEM) detectors provides amplification before the charge collection onto an anode plane with strip readout. Photomultiplier tubes located on the bottom of the tank containing the liquid argon provide the readout of the scintillation light.
This demonstrator is an industrial prototype of the design proposed for a large underground detector. WA105 is under construction at CERN and will be exposed to a charged particle beam (0.5-20 GeV/c), consisting of p, e+/- and K+/-, in the North Area in 2018. The data will provide necessary means for analysing and developing shower reconstruction, energy response and calibration, MC event generator tuning, particle identification, and tracking, as well as related efficiencies, and for development of analysis tools. This project is a crucial milestone providing feedback for future long baseline experiments considering LAr-TPCs.
WA105 is the prototype of a future long baseline experiment in the USA. The proposed Deep Underground Neutrino Experiment aims to transform our understanding of neutrinos and their role in the universe. The experiment would measure neutrino oscillations to find out why we live in a matter-dominated universe. DUNE also would look for neutrinos coming from the explosion of a star to discover the formation of a black hole. And DUNE would search for proton decay - particle interactions that would bring us closer to realizing Einstein's dream of a grand unified theory.
- DAWSON Jaime
- PATZAK Thomas
- PRAT Pierre
- 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