Helium flux and its ratio to proton flux in cosmic rays measured with CALET on the International Space Station

CALET collaboration

Helium flux and its ratio to proton flux in cosmic rays measured with CALET on the International Space Station

CALET collaboration

Research output: Contribution to journal › Conference article › peer-review

Abstract

The CALorimetric Electron Telescope (CALET) is a space-based calorimetric instrument, designed to carry out precision measurements of high energy cosmic rays. Installed on the Japanese Experiment Module – Exposed Facility on the ISS, it is collecting data with excellent performance and no significant interruptions since October 2015. We present the results of a direct measurement of the energy spectrum of cosmic-ray helium, based on about 6.5 years of collected data. It shows significant deviations from a single power law with a progressive hardening around a few hundred GeV followed by a softening in the multi-TeV region. A measurement of the proton to helium flux ratio is also presented. Thanks to the recent update of the CALET proton flux with higher statistics, the p/He ratio is measured with high precision, extending the energy reach of previous measurements with magnetic spectrometers by more than one order of magnitude.

Original language	English
Article number	054
Journal	Proceedings of Science
Volume	444
State	Published - Sep 27 2024
Event	38th International Cosmic Ray Conference, ICRC 2023 - Nagoya, Japan Duration: Jul 26 2023 → Aug 3 2023

Cite this

@article{f985702a1940402facc83ff7bb1a4f4e,

title = "Helium flux and its ratio to proton flux in cosmic rays measured with CALET on the International Space Station",

abstract = "The CALorimetric Electron Telescope (CALET) is a space-based calorimetric instrument, designed to carry out precision measurements of high energy cosmic rays. Installed on the Japanese Experiment Module – Exposed Facility on the ISS, it is collecting data with excellent performance and no significant interruptions since October 2015. We present the results of a direct measurement of the energy spectrum of cosmic-ray helium, based on about 6.5 years of collected data. It shows significant deviations from a single power law with a progressive hardening around a few hundred GeV followed by a softening in the multi-TeV region. A measurement of the proton to helium flux ratio is also presented. Thanks to the recent update of the CALET proton flux with higher statistics, the p/He ratio is measured with high precision, extending the energy reach of previous measurements with magnetic spectrometers by more than one order of magnitude.",

author = "\{CALET collaboration\} and Paolo Brogi and K. Kobayashi and O. Adriani and Y. Akaike and K. Asano and Y. Asaoka and E. Berti and G. Bigongiari and Binns, \{W. R.\} and M. Bongi and P. Brogi and A. Bruno and N. Cannady and G. Castellini and C. Checchia and Cherry, \{M. L.\} and G. Collazuol and \{de Nolfo\}, \{G. A.\} and K. Ebisawa and Ficklin, \{A. W.\} and H. Fuke and S. Gonzi and Guzik, \{T. G.\} and T. Hams and K. Hibino and M. Ichimura and K. Ioka and W. Ishizaki and Israel, \{M. H.\} and K. Kasahara and J. Kataoka and R. Kataoka and Y. Katayose and C. Kato and N. Kawanaka and Y. Kawakubo and K. Kobayashi and K. Kohri and Krawczynski, \{H. S.\} and Krizmanic, \{J. F.\} and P. Maestro and Marrocchesi, \{P. S.\} and Messineo, \{A. M.\} and Mitchell, \{J. W.\} and S. Miyake and Moiseev, \{A. A.\} and M. Mori and N. Mori and Motz, \{H. M.\} and K. Munakata and S. Nakahira and J. Nishimura and S. Okuno and Ormes, \{J. F.\} and S. Ozawa and L. Pacini and P. Papini and Rauch, \{B. F.\} and Ricciarini, \{S. B.\} and K. Sakai and T. Sakamoto and M. Sasaki and Y. Shimizu and A. Shiomi and P. Spillantini and F. Stolzi and S. Sugita and A. Sulaj and M. Takita and T. Tamura and T. Terasawa and S. Torii and Y. Tsunesada and Y. Uchihori and E. Vannuccini and Wefel, \{J. P.\} and K. Yamaoka and S. Yanagita and A. Yoshida and K. Yoshida and Zober, \{W. V.\}",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons.; 38th International Cosmic Ray Conference, ICRC 2023 ; Conference date: 26-07-2023 Through 03-08-2023",

year = "2024",

month = sep,

day = "27",

language = "English",

volume = "444",

journal = "Proceedings of Science",

issn = "1824-8039",

}

TY - JOUR

T1 - Helium flux and its ratio to proton flux in cosmic rays measured with CALET on the International Space Station

AU - CALET collaboration

AU - Brogi, Paolo

AU - Kobayashi, K.

AU - Adriani, O.

AU - Akaike, Y.

AU - Asano, K.

AU - Asaoka, Y.

AU - Berti, E.

AU - Bigongiari, G.

AU - Binns, W. R.

AU - Bongi, M.

AU - Brogi, P.

AU - Bruno, A.

AU - Cannady, N.

AU - Castellini, G.

AU - Checchia, C.

AU - Cherry, M. L.

AU - Collazuol, G.

AU - de Nolfo, G. A.

AU - Ebisawa, K.

AU - Ficklin, A. W.

AU - Fuke, H.

AU - Gonzi, S.

AU - Guzik, T. G.

AU - Hams, T.

AU - Hibino, K.

AU - Ichimura, M.

AU - Ioka, K.

AU - Ishizaki, W.

AU - Israel, M. H.

AU - Kasahara, K.

AU - Kataoka, J.

AU - Kataoka, R.

AU - Katayose, Y.

AU - Kato, C.

AU - Kawanaka, N.

AU - Kawakubo, Y.

AU - Kobayashi, K.

AU - Kohri, K.

AU - Krawczynski, H. S.

AU - Krizmanic, J. F.

AU - Maestro, P.

AU - Marrocchesi, P. S.

AU - Messineo, A. M.

AU - Mitchell, J. W.

AU - Miyake, S.

AU - Moiseev, A. A.

AU - Mori, M.

AU - Mori, N.

AU - Motz, H. M.

AU - Munakata, K.

AU - Nakahira, S.

AU - Nishimura, J.

AU - Okuno, S.

AU - Ormes, J. F.

AU - Ozawa, S.

AU - Pacini, L.

AU - Papini, P.

AU - Rauch, B. F.

AU - Ricciarini, S. B.

AU - Sakai, K.

AU - Sakamoto, T.

AU - Sasaki, M.

AU - Shimizu, Y.

AU - Shiomi, A.

AU - Spillantini, P.

AU - Stolzi, F.

AU - Sugita, S.

AU - Sulaj, A.

AU - Takita, M.

AU - Tamura, T.

AU - Terasawa, T.

AU - Torii, S.

AU - Tsunesada, Y.

AU - Uchihori, Y.

AU - Vannuccini, E.

AU - Wefel, J. P.

AU - Yamaoka, K.

AU - Yanagita, S.

AU - Yoshida, A.

AU - Yoshida, K.

AU - Zober, W. V.

PY - 2024/9/27

Y1 - 2024/9/27

N2 - The CALorimetric Electron Telescope (CALET) is a space-based calorimetric instrument, designed to carry out precision measurements of high energy cosmic rays. Installed on the Japanese Experiment Module – Exposed Facility on the ISS, it is collecting data with excellent performance and no significant interruptions since October 2015. We present the results of a direct measurement of the energy spectrum of cosmic-ray helium, based on about 6.5 years of collected data. It shows significant deviations from a single power law with a progressive hardening around a few hundred GeV followed by a softening in the multi-TeV region. A measurement of the proton to helium flux ratio is also presented. Thanks to the recent update of the CALET proton flux with higher statistics, the p/He ratio is measured with high precision, extending the energy reach of previous measurements with magnetic spectrometers by more than one order of magnitude.

AB - The CALorimetric Electron Telescope (CALET) is a space-based calorimetric instrument, designed to carry out precision measurements of high energy cosmic rays. Installed on the Japanese Experiment Module – Exposed Facility on the ISS, it is collecting data with excellent performance and no significant interruptions since October 2015. We present the results of a direct measurement of the energy spectrum of cosmic-ray helium, based on about 6.5 years of collected data. It shows significant deviations from a single power law with a progressive hardening around a few hundred GeV followed by a softening in the multi-TeV region. A measurement of the proton to helium flux ratio is also presented. Thanks to the recent update of the CALET proton flux with higher statistics, the p/He ratio is measured with high precision, extending the energy reach of previous measurements with magnetic spectrometers by more than one order of magnitude.

UR - https://www.scopus.com/pages/publications/85212256831

M3 - Conference article

AN - SCOPUS:85212256831

SN - 1824-8039

VL - 444

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 054

T2 - 38th International Cosmic Ray Conference, ICRC 2023

Y2 - 26 July 2023 through 3 August 2023

ER -

Helium flux and its ratio to proton flux in cosmic rays measured with CALET on the International Space Station

Abstract

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