Present experiment of BASJE group at Mt. Chacaltaya

Yoshii, H. and Morizawa, A. and Kakimoto, F. and Ogio, S. and Tsunesada, Y. and Tokunou, H. and Harada, D. and Burgoa, O. and Tajima, N. and Yamada, Y. and Shimoda, S. and Nishi, K. and Nakatani, H. and Gotoh, E. and Shirasaki, Y. and Miranda, P. and Velarde, A. and Kaneko, T. and Murakami, K. and Toyoda, Y. and Matsubara, Y. and Mizumoto, Y. (2001) Present experiment of BASJE group at Mt. Chacaltaya. Il nuovo cimento C, 24 C (4-5). pp. 507-512. ISSN 1826-9885

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A compact air shower array to observe primary cosmic rays above a few TeV has been installed at Mt. Chacaltaya in Bolivia since 1996. This array is available to observe the air showers above 6 TeV and the longitudinal development curves above 50 TeV. The purpose of the observations is to study the chemical composition and the energy spectrum of cosmic rays in the energy region including the “knee” of the energy spectrum. First, the consistency between direct measurements (balloon-borne experiments) and air shower observations in the energy region from 50 TeV to 80 TeV is examined and confirmed. Next, the chemical composition and the energy spectrum are derived from the air shower observations. In the study, the longitudinal developments of shower particles are calculated by Monte Carlo simulations, assuming different chemical compositions above 80 TeV. The characteristics of the present air shower array and the comparison of the preliminary observed results with that of the simulations are presented.

Item Type: Article
Additional Information: Paper presented at the Chacaltaya Meeting on Cosmic Ray Physics, La Paz, Bolivia, July 23-27, 2000.
Uncontrolled Keywords: Composition, energy spectra, and interactions ; Extensive air showers ; Conference proceedings
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.5 Meteorologia (Classificare qui l'atmosfera) (Classificare la previsione e le previsioni di specifici fenomeni meteorologici in 551.64; classificare la Micrometeorologia in 551.66) > 551.52 Termodinamica, interazioni atmosferiche con la superficie terrestre, temperature, radiazioni > 551.527 Radiazioni (per fenomeni ottici, vedi 551.565) > 551.5276 Radiazioni cosmiche (Include il rumore cosmico) (Classificare qui i raggi cosmici)
Depositing User: Marina Spanti
Date Deposited: 11 Mar 2020 10:15
Last Modified: 11 Mar 2020 10:15

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