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Title: Construction and performance of the barrel electromagnetic calorimeter for the Gluex experiment

The barrel calorimeter is part of the new spectrometer installed in Hall D at Jefferson Lab for the GlueX experiment. The calorimeter was installed in 2013, commissioned in 2014 and has been operating routinely since early 2015. The detector configuration, associated Monte Carlo simulations, calibration and operational performance are described in this paper. The calorimeter records the time and energy deposited by charged and neutral particles created by a multi-GeV photon beam. It is constructed as a lead and scintillating-fiber calorimeter and read out with 3840 large-area silicon photomultiplier arrays. Particles impinge on the detector over a wide range of angles, from normal incidence at 90 degrees down to 11.5 degrees, which defines a geometry that is fairly unique among calorimeters. The response of the calorimeter has been measured during a running experiment and performs as expected for electromagnetic showers below 2.5 GeV. Finally, we characterize the performance of the BCAL using the energy resolution integrated over typical angular distributions for π 0 and η production of σ E / E = 5 . 2 % / E ( GeV ) 3 . 6 % and a timing resolution of σ = 150 ps at 1 GeV.
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  1. Univ. of Regina, SK (Canada). Dept. of Physics
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. Carnegie Mellon Univ., Pittsburgh, PA (United States)
  4. National and Kapodistrian Univ. of Athens (Greece)
  5. Federico Santa Maria Technical Univ., Valparaiso (Chile)
  6. Indiana Univ., Bloomington, IN (United States)
Publication Date:
Report Number(s):
JLAB-PHY-18-2624; DOE/OR/23177-4318; arXiv:1801.03088
Journal ID: ISSN 0168-9002; PII: S0168900218304807
Grant/Contract Number:
AC05-06OR23177; FG02-05ER41374; FG02-87ER40315; SAPPJ-2015-00024; FB-0821
Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Research Org:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Indiana Univ., Bloomington, IN (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States); Univ. of Regina, SK (Canada); Federico Santa Maria Technical Univ., Valparaiso (Chile)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); Natural Sciences and Engineering Research Council of Canada (NSERC); National Commission for Scientific and Technological Research (CONICYT) (Chile)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; electromagnetic calorimeter; sampling calorimeter; scintillating fibers; silicon photomultipliers; MPPC; GlueX
OSTI Identifier:
1433089