Speaker
Rafaella Donghia
(INFN Frascati, Università degli Studi Roma Tre)
Description
The Mu2e experiment at Fermilab searches for the charged-lepton
flavour violating neutrino-less conversion of a negative muon into an
electron in the field of an aluminum nucleus [1]. The Mu2e detector
is composed of a tracker and an electromagnetic calorimeter and an
external veto for cosmic rays. The calorimeter plays an important role
in providing excellent particle identification capabilities, a fast
online trigger filter while aiding the track reconstruction
capabilities. The calorimeter requirements are to provide a large
acceptance for 100 MeV electrons and reach: (a) a time resolution
better than 0.5 ns @ 100 MeV; (b) an energy resolution O(10%) @ 100
MeV and (c) a position resolution of 1 cm. The calorimeter consists
of two disks, each one made of 674 pure CsI crystals readout by two
large area array 2×3 of UV-extended SiPM 6×6 mm2. We report here all
progresses done for the construction and test of the latest large
scale prototype that consists of an array of 51 pre-production
crystals Each crystal has been readout by two pre-production Mu2e
SiPMs. The prototype will be exposed to an electron beam in the energy
range around 100 MeV at the Beam Test Facility in Frascati
(Italy). Preliminary results of timing and energy resolution will be
shown.
References
[1] Mu2e Collaboration, Mu2e Technical Design Report, http://arxiv.org/abs/1501.05241, 2015
Primary author
Rafaella Donghia
(INFN Frascati, Università degli Studi Roma Tre)