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High precision photon flux determination for photon tagging experiments

  • A. Teymurazyan
  • , A Ahmidouch
  • , P. Ambrozewicz
  • , A. Asratyan
  • , K. Baker
  • , L. Benton
  • , V. Burkert
  • , E. Clinton
  • , P. L. Cole
  • , P. Collins
  • , D. Dale
  • , S. Danagoulian
  • , G. Davidenko
  • , R. Demirchyan
  • , A. Deur
  • , A. Dolgolenko
  • , G. Dzyubenko
  • , R. Ent
  • , A. Evdokimov
  • , J. Feng
  • M. Gabrielyan, L. Gan, Ashot Gasparian, O. Glamazdin, V. Goryachev, K. Hardy, J. He, M. M. Ito, L. Jiang, D. Kashy, M. Khandaker, A. Kolarkar, M. Konchatnyi, O. Korchin, W. Korsch, O. Kosinov, S. Kowalski, M. Kubantsev, V. Kubarovsky, I. Larin, D. Lawrence, X. Li, P. Martel, V. Matveev, D. McNulty, B. Mecking, B. Milbrath, R. Minehart, R. Miskimen, V. Mochalov, I. Nakagawa, S. Overby, E. Pasyuk, M. Payen, R. Pedroni, Y. Prok, B. G. Ritchie, C. Salgado, A. Shahinyan, A. Sitnikov, D. Sober, S. Stepanyan, W. Stevens, J. Underwood, A. Vasiliev, V. Vishnyakov, M. Wood, S. Zhou
  • Univ of Kentucky
  • North Carolina Agricultural and Technical State University
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Hampton University
  • Thomas Jefferson National Accelerator Facility
  • University of Massachusetts Amherst
  • Idaho State University
  • Arizona State University
  • University of North Carolina Wilmington
  • Chinese Institute of Atomic Energy
  • Kharkov Institute of Physics and Technology
  • Institute of High Energy Physics, Chinese Academy of Sciences
  • Massachusetts Institute of Technology
  • Northwestern University
  • Pacific Northwest National Laboratory
  • University of Virginia
  • Institute for High Energy Physics
  • RIKEN Nishina Center for Accelerator-Based Science
  • Norfolk State University
  • Yerevan Physics Institute
  • The Catholic University of America

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The Jefferson Laboratory PrimEx Collaboration has developed and implemented a method to control the tagged photon flux in photoproduction experiments at the 1% level over the photon energy range from 4.9 to 5.5 GeV. This method has been successfully implemented in a high precision measurement of the neutral pion lifetime. Here, we outline the experimental equipment and the analysis techniques used to accomplish this. These include the use of a total absorption counter for absolute flux calibration, a pair spectrometer for online relative flux monitoring, and a new method for post-bremsstrahlung electron counting.

Keywords

  • Pair spectrometer
  • Photon tagging
  • Photonuclear reactions

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