Liquid Argon Neutrino Experiments
Liquid Argon Detectors
Liquid Argon Time Projection Chambers (LArTPCs) are novel detectors designed for neutrino physics. Their exquisite neutrino detection efficiency and background capabilities have made these detectors the most promising choice for the next generation of neutrino detectors.
The principle of LArTPC is quite simple. Charged particles traversing the detector will ionise the LAr and the ionisation electrons can be drifted by an applied electric field. The electrons are then collected on wire planes, which offer a 3D view of the interaction. Because of the great image resolution, the good particle ID and calorimetric reconstruction, LArTPCs offer very high neutrino detection efficiencies and excellent background rejection power. In addition, the detectors have a great advantage over traditional neutrino detection technologies such as Water Cherenkov detectors; distinction between electrons and photons.
LAr detectors should be scalable to very large scales (multi kiloton) and the technology has been chosen for the next generation of neutrino experiments such as DUNE.
Despite the tremendous advantages of the LArTPCs, some technical challenges remain. Worldwide efforts are being dedicated to R&D efforts to demonstrate the advantages of LAr detectors. The Oxford Group is involved in the MicroBooNE experiment, which will accomplish many LAr R&D goals. The group is also leading some of the work on the Data Acquisition (DAQ) system for DUNE. Other smaller R&D projects are also planned.