Abstract
The experimental technique of fluorescence light measurement is used for indirect observations of cosmic ray particles at very high energies. Extensive Air Showers (EAS) initiated by Extreme Energy Cosmic Rays (EECRs), up to 100 EeV and entering the Earth’s atmosphere, are simulated with the CORSIKA package. The influence of different simulation parameters on the EAS characteristics is studied, especially on the longitudinal distribution of charged particles, depth of shower maximum and energy released to the air. By taking the atmospheric scattering of light into account, the number of fluorescence photons, with wavelengths between 300-430 nm, and their arrival time distribution to an ideal space telescope are calculated.
Highlights
Ultra High Energy Cosmic Rays (UHECR) are the most energetic particles observed in nature with detected energies up to 3 − 5.1020 eV
We have calculated the number of charged particles and energy deposit in the atmosphere for an Extensive Air Showers (EAS) initiated by an iron primary with an energy E = 1019 eV and a zenith angle θ = 60◦
We have performed a calculation of the number of the UV fluorescence photons arriving at the detector pupil of an ideal telescope aboard the ISS
Summary
Ultra High Energy Cosmic Rays (UHECR) are the most energetic particles observed in nature with detected energies up to 3 − 5.1020 eV. The experimental observations of UHECR are performed nowadays by the Pierre Auger Observatory (PAO) in Argentina and the Telescope Array (TA) observatory in the USA. The observation of these particles leads to many interesting questions mainly on their nature and origin. JEM-EUSO, which stands for Joint Experiment Missions for Extreme Universe Space Observatory, is a new type of observatory embarked on the ISS, and uses the Earth’s atmosphere as a detector It will observe transient luminous phenomena taking place in the atmosphere of the Earth and caused by particles coming from Space. The sensor is a super-wide field telescope that will detect primary particles with energy above 1020 eV
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