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Title: The HPS electromagnetic calorimeter

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. Finally, the detector is a homogeneous calorimeter, made of 442 lead-tungsten (PbWO$$_4$$) scintillating crystals, each read-out by an avalanche photodiode coupled to a custom trans-impedance amplifier.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [1] ;  [3] ;  [6] ;  [7] ;  [8] ;  [4] ;  [3] ;  [6] ;  [2] ;  [9] ;  [1] ;  [10] ;  [11] ;  [2] ;  [6] more »;  [12] ;  [6] ;  [2] ;  [5] ;  [12] ;  [13] ;  [5] ;  [3] ;  [12] ;  [4] ;  [6] ;  [2] ;  [6] ;  [8] ;  [6] ;  [14] ;  [2] ;  [9] ;  [9] « less
  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)
Publication Date:
Report Number(s):
JLAB-PHY-16-2374; DOE/OR/23177-3978; arXiv:1610.04319
Journal ID: ISSN 0168-9002; PII: S0168900217302620; TRN: US1700694
Grant/Contract Number:
AC05-06OR23177; AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 854; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; heavy photon; dark photon; electromagnetic calorimeter; lead-tungstate crystals; avalanche photodiodes; 47 OTHER INSTRUMENTATION
OSTI Identifier:
1345592
Alternate Identifier(s):
OSTI ID: 1361152