Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - CRI - Cosmic Ray Indirect
Cosmic ray energy spectrum in the 2nd knee region measured by the TALE-SD array
R. Abbasi, T. Abu-Zayyad, M. Allen, Y. Arai, R. Arimura, E. Barcikowski, J. Belz, D. Bergman, S. Blake, R. Cady, B. Cheon, J. Chiba, M. Chikawa, T. Fujii, K. Fujisue, K. Fujita, R. Fujiwara, M. Fukushima, R. Fukushima, G. Furlich, R. Gonzalez, W. Hanlon, M. Hayashi, N. Hayashida, K. Hibino, R. Higuchi, K. Honda, D. Ikeda, T. Inadomi, N. Inoue, T. Ishii, H. Ito, D. Ivanov, H. Iwakura, A. Iwasaki, H. Jeong, S. Jeong, C. Jui, K. Kadota, F. Kakimoto, O. Kalashev, K. Kasahara, S. Kasami, H. Kawai, S. Kawakami, S. Kawana, K. Kawata, I. Kharuk, E. Kido, H. Kim, J. Kim, J. Kim, M.H. Kim, S.W. Kim, Y. Kimura, S. Kishigami, Y. Kubota, S. Kurisu, V. Kuzmin, M. Kuznetsov, Y. Kwon, K. Lee, B.P. Lubsandorzhiev, J.P. Lundquist, K. Machida, H. Matsumiya, T. Matsuyama, J. Matthews, R. Mayta, M. Minamino, K. Mukai, I. Myers, S. Nagataki, K. Nakai, R. Nakamura, T. Nakamura, T. Nakamura, Y. Nakamura, A. Nakazawa, E. Nishio, T. Nonaka, H. Oda, S. Ogio, M. Ohnishi, H. Ohoka, Y. Oku, T. Okuda, Y. Omura, M. Ono, R. Onogi, A. Oshima, S. Ozawa, I.H. Park, M. Potts, M. Pshirkov, J. Remington, D. Rodriguez, G. Rubtsov, D. Ryu, H. Sagawa, R. Sahara, Y. Saito, N. Sakaki, T. Sako, N. Sakurai, K. Sano, K. Sato*, T. Seki, K. Sekino, P. Shah, Y. Shibasaki, F. Shibata, N. Shibata, T. Shibata, H. Shimodaira, B. Shin, H. Shin, D. Shinto, J. Smith, P. Sokolsky, N. Sone, B. Stokes, T. Stroman, Y. Takagi, Y. Takahashi, M. Takamura, M. Takeda, R. Takeishi, A. Taketa, M. Takita, Y. Tameda, H. Tanaka, K. Tanaka, M. Tanaka, Y. Tanoue, S. Thomas, G. Thomson, P. Tinyakov, I. Tkachev, H. Tokuno, T. Tomida, S. Troitsky, R. Tsuda, Y. Tsunesada, Y. Uchihori, S. Udo, T. Uehama, F. Urban, T. Wong, K. Yada, M. Yamamoto, K. Yamazaki, J. Yang, K. Yashiro, F. Yoshida, T. Yoshioka, Y. Zhezher and Z. Zundelet al. (click to show)
*: corresponding author
Full text: pdf
Pre-published on: July 31, 2021
Published on: March 18, 2022
Abstract
The Telescope Array Low energy Extension (TALE) experiment in Utah, U.S.A., consists of 10 atmospheric fluorescence telescopes and 80 Surface Detectors (SDs) spread over an area of $21~{\rm km}^2$. The SD array consists of 40 SDs at $400~\rm m$ spacing and 40 SDs at $600~\rm m$ spacing. The TALE-SD was completed in February 2018 and has been in steady operation since then, triggering at a rate of about 30 air shower events in 10 minutes. We have developed the software to measure the energy spectrum of cosmic rays from the data obtained by TALE-SD. The performance of the software was evaluated by using air shower events generated by Monte Carlo simulation. We estimate that when the energy of the primary cosmic ray is $10^{18.0}~\rm eV$, the accuracy of energy determination is 20\%, the accuracy of arrival direction determination is 1.5°, and the aperture is $16~\rm km^2 ~\rm sr$. We also compared the MC and Data to see if they were consistent. In this presentation, we will report these results.
DOI: https://doi.org/10.22323/1.395.0362
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