Design and status of the Mu2e electromagnetic calorimeter
Abstract
The Mu2e experiment at Fermilab aims at measuring the neutrinoless conversion of a negative muon into an electron and reach a single event sensitivity of 2.5x10^{-17} after three years of data taking. The monoenergetic electron produced in the final state, is detected by a high precision tracker and a crystal calorimeter, all embedded in a large superconducting solenoid (SD) surrounded by a cosmic ray veto system. The calorimeter is complementary to the tracker, allowing an independent trigger and powerful particle identification, while seeding the track reconstruction and contributing to remove background tracks mimicking the signal. In order to match these requirements, the calorimeter should have an energy resolution of O(5)% and a time resolution better than 500 ps at 100 MeV. The baseline solution is a calorimeter composed of two disks of BaF2 crystals read by UV extended, solar blind, Avalanche Photodiode (APDs), which are under development from a JPL, Caltech, RMD consortium. In this paper, the calorimeter design, the R&D studies carried out so far and the status of engineering are described. A backup alternative setup consisting of a pure CsI crystal matrix read by UV extended Hamamatsu MPPC's is also presented.
Keywords
Cite
@article{arxiv.1608.02652,
title = {Design and status of the Mu2e electromagnetic calorimeter},
author = {N. Atanov and V. Baranov and J. Budagov and R. Carosi and F. Cervelli and F. Colao and M. Cordelli and G. Corradi and E. Dane' and Yu. I. Davydov and S. Di Falco and S. Donati and R. Donghia and B. Echenard and K. Flood and S. Giovannella and V. Glagolev and F. Grancagnolo and F. Happacher and D. G. Hitlin and M. Martini and S. Miscetti and T. Miyashita and L. Morescalchi and P. Murat and D. Pasciuto and G. Pezzullo and F. Porter and A. Saputi and I. Sarra and S. R. Soleti and F. Spinella and G. Tassielli and V. Tereshchenko and Z. Usubov and R. Y. Zhu},
journal= {arXiv preprint arXiv:1608.02652},
year = {2016}
}
Comments
5 pages, 6 figures