The HPS electromagnetic calorimeter

Journal Article · Wed Feb 22 00:00:00 EST 2017 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2017.02.065· OSTI ID:1345592

Balossino, I. ^[1]; Baltzell, N. ^[2]; Battaglieri, M. ^[3]; Bondi, M. ^[4]; Buchanan, E. ^[5]; Calvo, D. ^[1]; Celentano, A. ^[3]; Charles, G. ^[6]; Colaneri, L. ^[7]; D'Angelo, A. ^[8]; Napoli, M. De ^[4]; Vita, R. De ^[3]; Dupre, R. ^[6]; Egiyan, H. ^[2]; Ehrhart, M. ^[9]; Filippi, A. ^[1]; Garcon, Michel ^[10]; Gevorgyan, N. ^[11]; Girod, F. -X. ^[2]; Guidal, M. ^[6] ; Holtrop, M. ^[12]; Iurasov, V. ^[6]; Kubarovsky, V. ^[2]; Livingston, K. ^[5]; McCarty, K. ^[12]; McCormick, J. ^[13]; McKinnon, B. ^[5]; Osipenko, M. ^[3]; Paremuzyan, R. ^[12]; Randazzo, N. ^[4]; Rauly, E. ^[6]; Raydo, B. ^[2]; Rindel, E. ^[6]; Rizzo, A. ^[8]; Rosier, P. ^[6]; Sipala, V. ^[14]; Stepanyan, S. ^[2]; Szumila-Vance, H. ^[9]; Weinstein, L. B. ^[9]

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1. Istituto Nazionale di Fisica Nucleare Sezione di Torino, Torino (Italy)
2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
3. Sezione di Genova e Dipartimento di Fisica dell'Univ., Genova (Italy)
4. Istituto Nazionale di Fisica Nucleare, Catania (Italy)
5. Univ. of Glasgow, Scotland (United Kingdom)
6. Univ. Paris-Saclay, Orsay (France)
7. Univ. Paris-Saclay, Orsay (France); Sezione di Roma Tor Vergata and Dipartimento di Fisica dell'Univ. di Roma Tor Vergata, Roma (Italy)
8. Sezione di Roma Tor Vergata and Dipartimento di Fisica dell'Univ. di Roma Tor Vergata, Roma (Italy)
9. Old Dominion Univ., Norfolk, VA (United States)
10. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. Paris-Saclay, Gif-sur-Yvette (France)
11. Yerevan Physics Inst. (YerPhI), Yerevan (Armenia)
12. Univ. of New Hampshire, Durham, NH (United States)
13. SLAC National Accelerator Lab., Menlo Park, CA (United States)
14. Lab. Nazionali del Sud and Univ. of Sassari, Catania (Italy)

The Heavy Photon Search experiment (HPS) is searching for a new gauge boson, the so-called “heavy photon.” Through its kinetic mixing with the Standard Model photon, this particle could decay into an electron-positron pair. It would then be detectable as a narrow peak in the invariant mass spectrum of such pairs, or, depending on its lifetime, by a decay downstream of the production target. The HPS experiment is installed in Hall-B of Jefferson Lab. This article presents the design and performance of one of the two detectors of the experiment, the electromagnetic calorimeter, during the runs performed in 2015–2016. The calorimeter's main purpose is to provide a fast trigger and reduce the copious background from electromagnetic processes through matching with a tracking detector. The detector is a homogeneous calorimeter, made of 442 lead-tungstate (PbWO₄) scintillating crystals, each read out by an avalanche photodiode coupled to a custom trans-impedance amplifier.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: AC05-06OR23177; AC02-76SF00515; FG02-96ER40960
• OSTI ID: 1345592
• Alternate ID(s): OSTI ID: 1361152; OSTI ID: 1550572
• Report Number(s): JLAB-PHY-16-2374; DOE/OR/23177-3978; arXiv:1610.04319; PII: S0168900217302620; TRN: US1700694
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 854, Issue C; ISSN 0168-9002
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

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