Scientific Results

Geant4 simulations of the lead fluoride calorimeter

Year: 2017

Authors: Savchenko A.A., Tishchenko A.A., Dabagov S.B., Anastasi A., Venanzoni G., Strikhanov M.N., Basti A., Bedeschi F., Bartolini M., Cantatore G., Cauz D., Corradi G., Di Sciascio G., Di Stefano R., Driutti A., Escalante O., Ferrari C., Fioretti A., Gabbanini C., Gioiosa A., Hampai D., Iacovacci M., Karuza M., Liedl A., Lusiani A., Marignetti F., Mastroianni S., Moricciani D., Pauletta G., Piacentino G.M., Raha N., Santi L.

Autors Affiliation: National Research Nuclear University “MEPhI”, Moscow, Russian Federation; Laboratori Nazionali di Frascati INFN, Frascati, Italy; Dipartimento MIFT, Università di Messina, Italy; P.N. Lebedev Physical Institute RAS, Moscow, Russian Federation; Istituto Nazionale di Ottica del C.N.R., S.S. di Pisa, Pisa, Italy; INFN, Sezione di Trieste e G.C. di Udine, Italy; INFN, Sezione di Napoli, Italy; INFN, Sezione di Roma Tor Vergata, Roma, Italy; Università di Trieste, Trieste, Italy; Università di Napoli, Napoli, Italy; Università di Udine, Udine, Italy; Università di Cassino, Cassino, Italy; University of Rijeka, Rijeka, Croatia; INFN, Sezione di Pisa, Italy; Scuola Normale Superiore, Pisa, Italy; INFN, Sezione di Lecce, Italy; Università del Molise, Pesche, Italy

Abstract: In this paper we simulate the charged particle interaction with complex structures, including the emission, with help of Geant4. We take into account Cherenkov radiation, transition radiation, bremsstrahlung, pair production and other accompanying processes. As an application we investigate the full size electromagnetic calorimeter for the muon g-2 experiment at Fermilab. A calorimeter module consists of a Delrin front panel for installation of the laser calibration system, 54 PbF2 Cherenkov crystals wrapped by black Tedlar paper, and silicon photo-multiplier sensors. We report here on results of a simulation of the radiation from positrons striking the calorimeter system. The Cherenkov radiation expansion when a positron moves down through the calorimeter at the arbitrary angle of incidence has been considered. Both spectral and angular distributions of Cherenkov optical photons in different parts of the calorimeter system was evaluated as well as the transition radiation and pre-shower distributions from both the Delrin panel and the Al vacuum chamber of the g-2 storage ring.

Journal/Review: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

Volume: 402      Pages from: 256  to: 262

More Information: This work was supported under grant RSF 16-12-10277. The opportunity to perform computer simulations at NRNU MEPhI high-performance computing center is also gratefully acknowledged.
KeyWords: Lead-fluoride crystals; Electromagnetic calorimeter; Geant4 optical processes; G-2 experiment; Muon experiment
DOI: 10.1016/j.nimb.2017.03.084

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