Energy calibration of the JLab bremsstrahlung tagging system Article

cited authors

  • Stepanyan, S; Boyarinov, S; Egiyan, H; Guo, L; Dale, D; Gabrielyan, M; Gan, L; Gasparian, A; Glamazdin, A; Mecking, B; Nakagawa, I; Teymurazyan, A; Wood, MH

fiu authors

abstract

  • In this report, we present the energy calibration of the Hall B bremsstrahlung tagging system at the Thomas Jefferson National Accelerator Facility. The calibration was performed using a magnetic pair spectrometer. The tagged photon energy spectrum was measured in coincidence with e+ e- pairs as a function of the pair spectrometer magnetic field. Taking advantage of the internal linearity of the pair spectrometer, the energy of the tagging system was calibrated at the level of ± 0.1 % Eγ. The absolute energy scale was determined using the e+ e- rate measurements close to the end-point of the photon spectrum. The energy variations across the full tagging range were found to be < 3 MeV. © 2007 Elsevier B.V. All rights reserved.

publication date

  • March 11, 2007

Digital Object Identifier (DOI)

start page

  • 654

end page

  • 661

volume

  • 572

issue

  • 2