Abstract
Data obtained with two detectors located at the Tunka Cosmic Ray facility are presented. The Cherenkov light array for registration of extensive air showers (EAS) Tunka-133 collected data during 5 winter seasons since 2009 to 2014. The differential energy spectrum of all particles and the dependence of the average maximum depth on the energy in the range of 6 · 1015−1018 eV measured for 1540 hours of observation are presented.
Highlights
extensive air showers (EAS) Cherenkov light array Tunka-133 with ∼3 km2 geometric area operated since 2009 [1]
Tunka-HiSCORE stations are located at the same area as Tunka-133 detectors
In 2013 the 9 station array, arranged on a rectangular grid, covered an area of 0.09 km2, which will be increased to about 0.25 km2 in 2014
Summary
EAS Cherenkov light array Tunka-133 with ∼3 km geometric area operated since 2009 [1]. Five winter seasons of data acquisition (∼107 triggers) and high quality of information permitted us to reconstruct primary energy spectrum and mass composition in the energy range 6 · 1015−1018 eV. This energy range is the most important for understanding of transition from Galactic to extragalactic cosmic rays (CR). To expand the measurement range to lower energies the new array Tunka-HiSCORE [2] data has been used. The preliminary primary energy spectrum in the range 200 TeV – 20 PeV by the data of the first season of 9 HiSCORE stations operation is presented. In 2013 the 9 station array, arranged on a rectangular grid, covered an area of 0.09 km, which will be increased to about 0.25 km in 2014
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