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CN 34-1054/N

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Lead glass calorimeter calibration and efficiency analysis for Coulomb sum rule (CSR) experiment in JLab Hall-A

  • 1.

    Department of Physics, Huangshan University, Huangshan 245041, China

  • 2.

    Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

Funds:  Supported by the National Natural Science Foundation of China (11135002, 11275083) and Natural Science Foundation of Anhui Education Committee (KJ2012B179, KJ2011B164).
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https://doi.org/10.3969/j.issn.0253-2778.2014.03.009
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  • Corresponding author: YAN Xinhu (corresponding author), male, born in 1977, PhD. Research field: Medium energy nuclear physics.
  • Received Date: 06 March 2013
  • Accepted Date: 10 June 2013
  • Rev Recd Date: 10 June 2013
  • Publish Date: 30 March 2014
    Abstract

  • Abstract

    Two layers of lead glass calorimeter are installed for additional PID analyses in each high resolution spectrometer (HRS) at Hall-A in Jefferson Lab (JLab). The Fumili minimization method of ROOT analysis software and quasi-elastic data of CSR experiment conducted by the authors in the early year of 2008 at JLab were used in the calibration of the calorimeter detector on HRS for the data analysis of CSR experiment. Since some high voltage changes in hardware settings, the lead glass calorimeter detector needed to be calibrated correspondingly. The calibration results are reasonable after this procedure. The best resolution of the calorimeter for the scattering electron was about 0048 GeV when its momentum was at 10 GeV after calibration. Total electron efficiency and pion rejection can reach 993% and 998%, respectively.

    Abstract

    Two layers of lead glass calorimeter are installed for additional PID analyses in each high resolution spectrometer (HRS) at Hall-A in Jefferson Lab (JLab). The Fumili minimization method of ROOT analysis software and quasi-elastic data of CSR experiment conducted by the authors in the early year of 2008 at JLab were used in the calibration of the calorimeter detector on HRS for the data analysis of CSR experiment. Since some high voltage changes in hardware settings, the lead glass calorimeter detector needed to be calibrated correspondingly. The calibration results are reasonable after this procedure. The best resolution of the calorimeter for the scattering electron was about 0048 GeV when its momentum was at 10 GeV after calibration. Total electron efficiency and pion rejection can reach 993% and 998%, respectively.
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    • References(9)
  • [1]
    Chen J P, Meziani Z E, Beck D, et al. Longitudinal and transverse response functions in 56Fe(e,e′) at momentum transfer near 1 GeV/c[J]. Phys Rev Lett, 1991, 66: 1 283-1 286.
    [2]
    Meziani Z E, Barreau P, Bernheim M, et al. Coulomb sum rule for 40Ca, 48Ca, and 56Fe for |q|≤500 MeV/c[J]. Phys Rev Lett, 1984, 52: 2 130-2 133.
    [3]
    Meziani Z E, Barreau P, Bernheim M, et al. Transverse response functions in deep-inelastic electron scattering for 40Ca, 48Ca, and 56Fe[J]. Phys Rev Lett, 1985, 54: 1 233-1 236.
    [4]
    Deady M, Williamson C F, Zimmerman P D, et al. Deep inelastic separated response functions from 40Ca and 48Ca[J]. Phys Rev C, 1986, 33: 1 897-1 904.
    [5]
    Blatchley C C, LeRose J J, Pruet O E, et al. Quasi-elastic electron scattering from 238U[J]. Phys Rev C, 1986, 34: 1 234-1 247.
    [6]
    De Forest Jr T. The relativistic Coulomb sum rule for electron scattering in the independent-particle model[J]. Nucl Phys A, 1984, 414(3): 347-358.
    [7]
    Grupen C. Particle Detectors[M]. Cambridge: Cambridge University Press, 1996: 193.
    [8]
    Liyanage N. A study of the 16O(e,e′p) reaction at deep missing energies[D]. Massachusetts Institute of Technology, Cambridge, Massachusetts, 1999.
    [9]
    Alcorn J, et al (JLab Collaboration). Basic instrumentaion for Hall A at Jefferson Lab[J]. Nuclear Instruments and Methods in Physics Research A, 2004,522:294-346.
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    [1]
    Chen J P, Meziani Z E, Beck D, et al. Longitudinal and transverse response functions in 56Fe(e,e′) at momentum transfer near 1 GeV/c[J]. Phys Rev Lett, 1991, 66: 1 283-1 286.
    [2]
    Meziani Z E, Barreau P, Bernheim M, et al. Coulomb sum rule for 40Ca, 48Ca, and 56Fe for |q|≤500 MeV/c[J]. Phys Rev Lett, 1984, 52: 2 130-2 133.
    [3]
    Meziani Z E, Barreau P, Bernheim M, et al. Transverse response functions in deep-inelastic electron scattering for 40Ca, 48Ca, and 56Fe[J]. Phys Rev Lett, 1985, 54: 1 233-1 236.
    [4]
    Deady M, Williamson C F, Zimmerman P D, et al. Deep inelastic separated response functions from 40Ca and 48Ca[J]. Phys Rev C, 1986, 33: 1 897-1 904.
    [5]
    Blatchley C C, LeRose J J, Pruet O E, et al. Quasi-elastic electron scattering from 238U[J]. Phys Rev C, 1986, 34: 1 234-1 247.
    [6]
    De Forest Jr T. The relativistic Coulomb sum rule for electron scattering in the independent-particle model[J]. Nucl Phys A, 1984, 414(3): 347-358.
    [7]
    Grupen C. Particle Detectors[M]. Cambridge: Cambridge University Press, 1996: 193.
    [8]
    Liyanage N. A study of the 16O(e,e′p) reaction at deep missing energies[D]. Massachusetts Institute of Technology, Cambridge, Massachusetts, 1999.
    [9]
    Alcorn J, et al (JLab Collaboration). Basic instrumentaion for Hall A at Jefferson Lab[J]. Nuclear Instruments and Methods in Physics Research A, 2004,522:294-346.
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