Skip to Main content Skip to Navigation
Journal articles

Measurement of air and nitrogen fluorescence light yields induced by electron beam for UHECR experiments

Abstract : Most of the Ultra High Energy Cosmic Ray (UHECR) experiments and projects (HiRes, AUGER, TA, EUSO, TUS,...) use air fluorescence to detect and measure extensive air showers (EAS). The precise knowledge of the Fluorescence Light Yield (FLY) is of paramount importance for the reconstruction of UHECR. The MACFLY - Measurement of Air Cherenkov and Fluorescence Light Yield - experiment has been designed to perform such FLY measurements. In this paper we will present the results of FLY in the 290-440 nm wavelength range for dry air and pure nitrogen, both excited by electrons with energy of 1.5 MeV, 20 GeV and 50 GeV. The experiment uses a 90Sr radioactive source for low energy measurement and a CERN SPS electron beam for high energy. We find that the FLY is proportional to the deposited energy (E_d) in the gas and we show that the air fluorescence properties remain constant independently of the electron energy. At the reference point: atmospheric dry air at 1013 hPa and 23C, the ratio FLY/E_d=17.6 photon/MeV with a systematic error of 13.2%.
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00147970
Contributor : Claudine Bombar <>
Submitted on : Monday, May 21, 2007 - 2:32:12 PM
Last modification on : Friday, November 6, 2020 - 3:31:06 AM

Links full text

Identifiers

Collections

Citation

P. Colin, A. Chukanov, V. Grebenyuk, D. Naumov, P. Nedelec, et al.. Measurement of air and nitrogen fluorescence light yields induced by electron beam for UHECR experiments. Astroparticle Physics, Elsevier, 2007, 27, pp.317-325. ⟨10.1016/j.astropartphys.2006.11.008⟩. ⟨in2p3-00147970⟩

Share

Metrics

Record views

172