The paper is considering an opportunity for the CERN/GranSasso (CNGS) neutrino complex, concurrent time-wise with T2K and NOvA projects, with the aim of improving the sensitivity on v(mu) <-> v(e) theta(13) mixing angle by nearly an order of magnitude with respect to T2K expectations. The experiment is based on approximate to 20 kt fiducial volume LAr-TPC, following very closely the technology developed for the ICARUS-T600. The present preliminary proposal, called MODULAr, is focused on the following three main activities, for which we seek an extended international collaboration: (1) The neutrino beam from the CERN 400 GeV proton beam and an optimized horn focussing, eventually with an increased intensity in the framework of the LHC accelerator improvement programme. (2) A new experimental area LNGS-B, of at least 50,000 m(3) at 10 km off-axis from the main laboratory, eventually upgradable to larger sizes. A location is under consideration at about 1.2 km equivalent water depth. The bubble chamber like imaging and the very fine calorimetry of the LAr-TPC detector will ensure the best background recognition not only from the off-axis neutrinos from the CNGS but also for proton decay and cosmic neutrinos. (3) A new LAr Imaging detector, at least initially with about 20 kt fiducial mass, realised with a modular set of four identical, but independent units, each of about 5 kt, "cloning" the basic technology of the T600. Further phases may foresee extensions of MODULAr to a mass required by the future physics goals. Compared with large water Cherenkov (T2K) and fine grained scintillators (NOvA), the LAr-TPC offers a higher detection efficiency for a given mass and lower backgrounds, since virtually all channels may be unambiguously recognized. In addition to the search for 013 oscillations and CP violation, it would be possible to collect a large number of accurately identified cosmic ray neutrino events and perform search for proton decay in the exotic channels. (C) 2008 Elsevier B.V. All rights reserved.
A new, very massive modular Liquid Argon Imaging Chamber to detect low energy off-axis neutrinos from the CNGS beam (Project MODULAr) / B., Baibussinov; M. B., Ceolin; G., Battistoni; P., Benetti; A., Borio; E., Calligarich; M., Cambiaghi; F., Cavanna; S., Centro; A. G., Cocco; R., Dolfini; A. G., Berzolari; C., Farnese; A., Fava; A., Ferrari; Fiorillo, Giuliana; D., Gibin; A., Guglielmi; G., Mannocchi; F., Mauri; A., Menegolli; G., Meng; C., Montanari; O., Palamara; L., Periale; P., Picchi; F., Pietropaolo; A., Rappoldi; G. L., Raselli; M., Rossella; C., Rubbia; P., Sala; G., Satta; F., Varanini; S., Ventura; C., Vignoli. - In: ASTROPARTICLE PHYSICS. - ISSN 0927-6505. - STAMPA. - 29:(2008), pp. 174-187. [10.1016/j.astropartphys.2008.01.001]
A new, very massive modular Liquid Argon Imaging Chamber to detect low energy off-axis neutrinos from the CNGS beam (Project MODULAr)
FIORILLO, GIULIANA;
2008
Abstract
The paper is considering an opportunity for the CERN/GranSasso (CNGS) neutrino complex, concurrent time-wise with T2K and NOvA projects, with the aim of improving the sensitivity on v(mu) <-> v(e) theta(13) mixing angle by nearly an order of magnitude with respect to T2K expectations. The experiment is based on approximate to 20 kt fiducial volume LAr-TPC, following very closely the technology developed for the ICARUS-T600. The present preliminary proposal, called MODULAr, is focused on the following three main activities, for which we seek an extended international collaboration: (1) The neutrino beam from the CERN 400 GeV proton beam and an optimized horn focussing, eventually with an increased intensity in the framework of the LHC accelerator improvement programme. (2) A new experimental area LNGS-B, of at least 50,000 m(3) at 10 km off-axis from the main laboratory, eventually upgradable to larger sizes. A location is under consideration at about 1.2 km equivalent water depth. The bubble chamber like imaging and the very fine calorimetry of the LAr-TPC detector will ensure the best background recognition not only from the off-axis neutrinos from the CNGS but also for proton decay and cosmic neutrinos. (3) A new LAr Imaging detector, at least initially with about 20 kt fiducial mass, realised with a modular set of four identical, but independent units, each of about 5 kt, "cloning" the basic technology of the T600. Further phases may foresee extensions of MODULAr to a mass required by the future physics goals. Compared with large water Cherenkov (T2K) and fine grained scintillators (NOvA), the LAr-TPC offers a higher detection efficiency for a given mass and lower backgrounds, since virtually all channels may be unambiguously recognized. In addition to the search for 013 oscillations and CP violation, it would be possible to collect a large number of accurately identified cosmic ray neutrino events and perform search for proton decay in the exotic channels. (C) 2008 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
