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Energy calibration of the JLab bremsstrahlung tagging system

Author:: 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, M. H.
Journal:: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Issue Date:: 2007
Abstract(summary):: 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%E. 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. (c) 2007 Elsevier B.V. All rights reserved.
Page:: 654---661

References

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Energy calibration of the JLab bremsstrahlung tagging system

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