Kavli Affiliate: Radomir Smida
| First 5 Authors: , , , ,
| Summary:
Ultra-high-energy cosmic rays (UHECRs) are the most energetic particles ever
detected. Cosmic rays that achieve the highest energies are rare, and their
flux at Earth is extremely low. As a result, next-generation experiments with
large effective areas are required and under development. The Fluorescence
detector Array of Single-pixel Telescopes (FAST) is one such project. Although
observation time is limited compared with ground particle detectors, it enables
direct measurements of $X_mathrmmax$, a crucial parameter sensitive to the
primary cosmic-ray composition. FAST will achieve large-area coverage by
significantly reducing the cost of telescopes. This necessitates a simplified
telescope compared to conventional designs. Demonstrating the feasibility of
our telescope and observational method is essential. To validate the FAST
concept, prototype telescopes have been deployed at the Pierre Auger
Observatory and the Telescope Array experiment.
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