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Measurement of cosmic rays with energies down to the PeV region using the TALE-infill SD array

  • Telescope Array Collaboration
  • Osaka Metropolitan University
  • Loyola University Chicago
  • University of Utah
  • Hanyang University
  • The University of Tokyo
  • Academia Sinica - Institute of Physics
  • RIKEN
  • Kanagawa University
  • University of Yamanashi
  • Sungkyunkwan University
  • Tokyo City University
  • Institute for Nuclear Research of the Russian Academy of Sciences
  • Shibaura Institute of Technology
  • Shinshu University
  • Osaka Electro-Communication University
  • Université libre de Bruxelles
  • Yonsei University

Research output: Contribution to journalConference articlepeer-review

Abstract

The Telescope Array Low-energy Extension (TALE) experiment is a project that extends the Telescope Array (TA) experiment to observe cosmic rays with energies down to 1016.5 eV using 10 fluorescence detectors (FDs) and 80 surface detectors (SDs). The TALE-infill SD array, consisting of 50 SDs arranged in a grid pattern with 100-meter spacing, has been installed to extend observations to lower energies, covering the PeV energy region. The extension as TALE-infill enables precise measurements of the energy spectrum, mass composition, and arrival direction anisotropy of cosmic rays around the knee, with the aim of investigating the origin of cosmic rays and the physical mechanisms responsible for the knee feature. In this paper, we report on the observational status of the TALE-infill array, using the first data from November 2023 to Jun 2024.

Original languageEnglish
Article number096
JournalProceedings of Science
Volume484
StatePublished - 29 Apr 2025
Event7th International Symposium on Ultra-High-Energy Cosmic Rays, UHECR 2024 - Malargue, Argentina
Duration: 17 Nov 202421 Nov 2024

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