Measurement of pressure dependent fluorescence yield of air: Calibration factor for UHECR detectors

J. W. Belz, G. W. Burt, Z. Cao, F. Y. Chang, C. C. Chen, C. W. Chen, P. Chen, C. Field, J. Findlay, P. Hüntemeyer*, M. A. Huang, W. Y.P. Hwang, R. Iverson, B. F. Jones, C. C.H. Jui, M. Kirn, Guey-Lin Lin, E. C. Loh, M. M. Maestas, N. ManagoK. Martens, J. N. Matthews, J. S.T. Ng, A. Odian, K. Reil, J. D. Smith, R. Snow, P. Sokolsky, R. W. Springer, J. R. Thomas, S. B. Thomas, G. B. Thomson, D. Walz, A. Zech

*Corresponding author for this work

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Abstract

In a test experiment at the Final Focus Test Beam of the Stanford Linear Accelerator Center, the fluorescence yield of 28.5 GeV electrons in air and nitrogen was measured. The measured photon yields between 300 and 400 nm at 1 atm and 29 °C areY(760Torr)air=4.42±0.73andY(760Torr)N2=29. 2±4.8photons per electron per meter. Assuming that the fluorescence yield is proportional to the energy deposition of a charged particle traveling through air, good agreement with measurements at lower particle energies is observed.

Original languageEnglish
Pages (from-to)129-139
Number of pages11
JournalAstroparticle Physics
Volume25
Issue number2
DOIs
StatePublished - 1 Mar 2006

Keywords

  • Air fluorescence
  • Extensive air shower
  • Nitrogen fluorescence
  • Ultrahigh-energy cosmic rays

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    Belz, J. W., Burt, G. W., Cao, Z., Chang, F. Y., Chen, C. C., Chen, C. W., Chen, P., Field, C., Findlay, J., Hüntemeyer, P., Huang, M. A., Hwang, W. Y. P., Iverson, R., Jones, B. F., Jui, C. C. H., Kirn, M., Lin, G-L., Loh, E. C., Maestas, M. M., ... Zech, A. (2006). Measurement of pressure dependent fluorescence yield of air: Calibration factor for UHECR detectors. Astroparticle Physics, 25(2), 129-139. https://doi.org/10.1016/j.astropartphys.2005.12.008