Abstract
The results of the Yakutsk array experiment aimed at investigations of ultra-high energy cosmic rays (UHECRs) are presented. We outline the current status of the instrument and an outlook for future directions and areas of study.
Highlights
The results of the Yakutsk array experiment aimed at investigations of ultra-high energy cosmic rays (UHECRs) are presented
We outline the current status of the instrument and an outlook for future directions and areas of study
Krasilnikov has formulated an idea of the EAS array in Yakutsk [1]; - 1967: The construction begun of EAS-13 prototype; - 1970: Engineering stage built up; first showers detected; - To 1973 the 1st stage array was completed consisting of 43 stations with 2 scintillators, Cherenkov light detectors, detectors of muons; - 1991: the 2nd stage of the array completed
Summary
Energy spectrum of CRs measured with the Yakutsk array in the energy range E ∈ (1015, 1020) eV is shown in Fig. 3 in comparison with some other relevant experiments. The mean shower maximum depth in the atmosphere, Xmax, is estimated using the connection between this parameter and the lateral distribution slope of Cherenkov light intensity and the halfwidth of the signal at the ground level [7] (Fig. 4). This data are used to estimate the average mass of CR particles using Horandel’s relation [8] (Fig. 5).
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