Measurement of the cosmic-ray energy spectrum with the TALE detector in hybrid mode

The TA Low-energy Extension (TALE) experiment extends the reach of the TA experiment on the low-energy side to below $10^{16}$\,eV. A primary objective of TALE is to study the transition from galactic to extragalactic cosmic rays. The TALE detector is a hybrid observatory composed of fluorescence telescopes and a surface detector array of scintillation counters. The surface detectors are arranged with inter-counter spacing optimized for hybrid energy spectrum measurements in the low-energy region. We analyzed data collected between November 2018 and May 2023, corresponding to 1,247 hours of operation, and in this presentation, we will show the results of the cosmic ray energy spectrum measurement using the TALE hybrid detector. This measurement will play an important role in understanding the transition from cosmic rays of galactic origin to those of extragalactic origin.

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Publication Details

Published
2025-09-24
DOI
https://doi.org/10.22323/1.501.0350
Primary Topic
Dark Matter and Cosmic Phenomena
Type
article
Field-Weighted Citation Impact
0.00

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article

Measurement of the cosmic-ray energy spectrum with the TALE detector in hybrid mode

T. Sako, H. Oshima, S. Ogio, K. Fujita
Dark Matter and Cosmic Phenomena
article

Measurement of the cosmic-ray energy spectrum with the TALE detector in hybrid mode

T. Sako, H. Oshima, S. Ogio, K. Fujita
article en

Abstract

The TA Low-energy Extension (TALE) experiment extends the reach of the TA experiment on the low-energy side to below $10^{16}$\,eV. A primary objective of TALE is to study the transition from galactic to extragalactic cosmic rays. The TALE detector is a hybrid observatory composed of fluorescence telescopes and a surface detector array of scintillation counters. The surface detectors are arranged with inter-counter spacing optimized for hybrid energy spectrum measurements in the low-energy region. We analyzed data collected between November 2018 and May 2023, corresponding to 1,247 hours of operation, and in this presentation, we will show the results of the cosmic ray energy spectrum measurement using the TALE hybrid detector. This measurement will play an important role in understanding the transition from cosmic rays of galactic origin to those of extragalactic origin.

National Science Foundation, National Research Foundation, National Research Foundation of Korea, University of Tokyo, Ministry of Science and Higher Education of the Russian Federation, Japan Society for the Promotion of Science, RIKEN, Institute for Cosmic Ray Research, University of Tokyo
Openalex Percentile: Top 89%
Dark Matter and Cosmic Phenomena
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