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Open AccessOpen Access JUSTC Research Articles:Physics

HRS optics optimization method 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), Natural Science Foundation of Anhui Education Commitee (KJHS2015B05), Project of College Leader Talent of Anhui Education Commitee (2016).
Cite this:
https://doi.org/10.3969/j.issn.0253-2778.2015.12.009
More Information
  • Corresponding author: YAN Xinhu (corresponding author), male, born in 1977, PhD/lecturer. Research field: high energy physics.
  • Received Date: 07 October 2014
  • Accepted Date: 20 February 2015
  • Rev Recd Date: 20 February 2015
  • Publish Date: 30 December 2015
    Abstract

  • Abstract

    In order to study the acceptance and calculate cross sections for CSR experiment, one needs to obtain target variables on the target plane of the spectrometer. Target variables can be reconstructed from focal plane variables with optics. In principle, the optics is the mathematical expression of the magnetic field of HRS. The optics optimization method which minimizes χ2 of TgVardata-TgVatheory to determine the better optics matrix elements for CSR experiment was studied. The optimization results show a good agreement between the data and theoretical values.

    Abstract

    In order to study the acceptance and calculate cross sections for CSR experiment, one needs to obtain target variables on the target plane of the spectrometer. Target variables can be reconstructed from focal plane variables with optics. In principle, the optics is the mathematical expression of the magnetic field of HRS. The optics optimization method which minimizes χ2 of TgVardata-TgVatheory to determine the better optics matrix elements for CSR experiment was studied. The optimization results show a good agreement between the data and theoretical values.
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    • References(8)
  • [1]
    Alcorna J, Andersonb B D, Aniolc K A. Basic instrumentation for Hall A at Jefferson Lab[J]. NIM A, 2004, 522: 294-346.
    [2]
    Brown K L. SLAC Report 75 (1970)[Z]. revised edition, 1982.
    [3]
    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: 1 283-2 186.
    [4]
    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.
    [5]
    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.
    [6]
    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.
    [7]
    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.
    [8]
    Liyanage N. Optics calibration of the Hall a high-resolution spectrometers using the new optimizer[R]. Newport News, VA: Jefferson Lab,2002: JLab-TN-02-012.
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    [1]
    Alcorna J, Andersonb B D, Aniolc K A. Basic instrumentation for Hall A at Jefferson Lab[J]. NIM A, 2004, 522: 294-346.
    [2]
    Brown K L. SLAC Report 75 (1970)[Z]. revised edition, 1982.
    [3]
    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: 1 283-2 186.
    [4]
    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.
    [5]
    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.
    [6]
    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.
    [7]
    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.
    [8]
    Liyanage N. Optics calibration of the Hall a high-resolution spectrometers using the new optimizer[R]. Newport News, VA: Jefferson Lab,2002: JLab-TN-02-012.
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