Measurement of the cosmic ray energy spectrum in the 2nd knee region with the TALE-SD array
Pre-published on:
July 25, 2023
Published on:
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Abstract
The Telescope Array Low-energy Extension (TALE) experiment observes cosmic rays with 10 atmospheric fluorescence telescopes and an array of 80 surface detectors (SDs) distributed over an area of $21\,\mathrm{km^2}$. The SD array consists of 40 SDs spaced at $400\,\mathrm{m}$ and 40 SDs spaced at $600\,\mathrm{m}$. One of the goals of TALE-SD is to observe cosmic rays with energies down to $10^{16.5}\,\mathrm{eV}$ to resolve the origin of the second knee and the energy of a galactic-extragalactic transition. The TALE-SD was completed in February 2018 and has been in continuous operation since then. In this work, we present the cosmic ray energy spectrum from the data recorded by the TALE-SD array from October 2nd, 2019 to September 28th, 2022.
DOI: https://doi.org/10.22323/1.444.0405
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