Measurement of the near-infrared fluorescence of the air for the detection of ultra-high-energy cosmic rays
arXiv:1008.0329 · doi:10.1016/j.astropartphys.2010.09.001
Abstract
We have investigated the fluorescence emission in the Near Infrared from the air and its main components, nitrogen and oxygen. The gas was excited by a 95kV electron beam and the fluorescence light detected by an InGaAs photodiode, sensitive down to about 1700nm. We have recorded the emission spectra by means of a Fourier Transform Infrared spectrometer. The light yield was also measured by comparing the Near Infrared signal with the known Ultraviolet fluorescence, detected by a Si photodiode. The possibility of using the Near Infrared fluorescence of the atmosphere to detect Ultra-High-Energy Cosmic Rays is discussed, showing the pros and the cons of this novel method.
11 pages, 8 figures. Vers.2 with minor changes. Accepted for publication in Astroparticle Physics. Vers.3 with correction of a misprinted formula