2026/07/10 更新

写真a

アカイケ　ヨウスイ
赤池　陽水
News & Topics
所属
理工学術院 理工学術院総合研究所
職名
主任研究員（研究院准教授）

経歴

  • 2020年04月
    -
    継続中

    国立研究開発法人宇宙航空研究開発機構   有人宇宙技術部門 宇宙環境利用推進センター   客員

  • 2020年04月
    -
    継続中

    早稲田大学   理工学術院総合研究所   主任研究員(研究院准教授)

  • 2018年02月
    -
    2020年03月

    University of Maryland Baltimore County, NASA/GSFC/CRESST   Assistant Research Scientist

  • 2016年02月
    -
    2018年02月

    NASA Goddard Space Flight Center   Astroparticle Physics Laboratory   日本学術振興会海外特別研究員

  • 2015年04月
    -
    2016年02月

    早稲田大学   先進理工学部   助手

  • 2012年04月
    -
    2015年03月

    東京大学   宇宙線研究所   日本学術振興会特別研究員PD

  • 2009年04月
    -
    2012年03月

    早稲田大学   理工学術院   日本学術振興会特別研究員DC1

▼全件表示

研究分野

  • 素粒子、原子核、宇宙線、宇宙物理に関する実験 / 宇宙惑星科学 / 天文学

受賞

  • ICRC2025 Best Poster Prize

    2025年07月   ICPAP Commission C4   Precise Measurements of the Electron plus Positron Spectrum with CALET on the International Space Station  

    受賞者： Y. AKaike

  • 2018 ISS Award for Compelling Results

    2018年07月   The American Astronautical Society   Compelling Results in Physical Science and Material Development  

    受賞者： CALET team

 

論文

  • Precision Spectral Measurements of Chromium and Titanium from 10 to 250 GeV/n and Sub-Iron to Iron Ratio with the Calorimetric Electron Telescope on the International Space Station

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

    Physical Review Letters   135 ( 2 )  2025年07月  [査読有り]

    担当区分：責任著者

    　概要を見る

    The Calorimetric Electron Telescope (CALET), in operation on the International Space Station since 2015, collected a large sample of cosmic-ray (CR) iron and sub-iron events over a wide energy interval. In this Letter, we report an update of our previous measurement of the iron flux and we present—for the first time—a high statistics measurement of the spectra of two sub-iron elements Cr and Ti in the energy interval from 10 to 250  GeV/n. The analyses are based on 8 years of data. Differently from older generations of cosmic-ray instruments which, in most cases, could not resolve individual sub-iron elements, CALET can identify each nuclear species from proton to nickel (and beyond) with a measurement of their electric charge. Thanks to the improvement in statistics and a more refined assessment of systematic uncertainties, the iron spectral shape is better resolved, at high energy, than in our previous paper, and we report its flux ratio to chromium and titanium. The measured fluxes of Cr and Ti show energy dependences compatible with a single power law with spectral indices −2.74±0.06 and −2.88±0.06, respectively.

    DOI

    Scopus

    1
    被引用数
    (Scopus)

  • Direct Measurement of the Spectral Structure of Cosmic-Ray Electrons + Positrons in the TeV Region with CALET on the International Space Station

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

    Physical Review Letters   131 ( 19 )  2023年11月  [査読有り]

    担当区分：責任著者

    DOI

  • Charge-Sign Dependent Cosmic-Ray Modulation Observed with the Calorimetric Electron Telescope on the International Space Station

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

    Physical Review Letters   130 ( 21 )  2023年05月  [査読有り]

    担当区分：責任著者

    DOI

  • Direct Measurement of the Cosmic-Ray Helium Spectrum from 40 GeV to 250 TeV with the Calorimetric Electron Telescope on the International Space Station

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

    Physical Review Letters   130 ( 17 )  2023年04月  [査読有り]

    DOI

  • Cosmic-ray Boron Flux Measured from 8.4 GeV/n to 3.8 TeV/n with the Calorimetric Electron Telescope on the International Space Station

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

    Physical Review Letters   129 ( 25 )  2022年12月  [査読有り]

    担当区分：責任著者

    　概要を見る

    We present the measurement of the energy dependence of the boron flux in cosmic rays and its ratio to the carbon flux in an energy interval from 8.4 GeV/n to 3.8 TeV/n based on the data collected by the Calorimetric Electron Telescope (CALET) during ∼6.4 yr of operation on the International Space Station. An update of the energy spectrum of carbon is also presented with an increase in statistics over our previous measurement. The observed boron flux shows a spectral hardening at the same transition energy E0∼200 GeV/n of the C spectrum, though B and C fluxes have different energy dependences. The spectral index of the B spectrum is found to be γ=-3.047±0.024 in the interval 25<E<200 GeV/n. The B spectrum hardens by ΔγB=0.25±0.12, while the best fit value for the spectral variation of C is ΔγC=0.19±0.03. The B/C flux ratio is compatible with a hardening of 0.09±0.05, though a single power-law energy dependence cannot be ruled out given the current statistical uncertainties. A break in the B/C ratio energy dependence would support the recent AMS-02 observations that secondary cosmic rays exhibit a stronger hardening than primary ones. We also perform a fit to the B/C ratio with a leaky-box model of the cosmic-ray propagation in the Galaxy in order to probe a possible residual value λ0 of the mean escape path length λ at high energy. We find that our B/C data are compatible with a nonzero value of λ0, which can be interpreted as the column density of matter that cosmic rays cross within the acceleration region.

    DOI PubMed

  • SuperTIGER instrument abundances of galactic cosmic rays for the charge interval 41 < Z < 56

    Nathan Elliot Walsh, Yosui Akaike, Walter Robert Binns, Richard G. Bose, Terri J. Brandt, Dana L. Braun, Nicholas W. Cannady, Paul F. Dowkontt, Thomas Hams, Martin H. Israel, John F. Krizmanic, Allan W. Labrador, Richard A. Mewaldt, John W. Mitchell, Ryan P. Murphy, Georgia A. de Nolfo, Scott Nutter, Martin A. Olevitch, Brian F. Rauch, Kenichi Sakai, Makoto Sasaki, Garry E. Simburger, Ed C. Stone, Teresa Tatoli, John Ennis Ward, Mark E. Wiedenbeck, Wolfgang Zober

    ADVANCES IN SPACE RESEARCH   70 ( 9 ) 2666 - 2673  2022年11月  [査読有り]

    　概要を見る

    We report preliminary elemental abundance results from the 55-day long-duration-balloon flight of SuperTIGER (Super Trans-Iron Galactic Element Recorder) during the 2012-2013 austral summer. SuperTIGER measured the relative abundances of Galactic cosmic -ray (GCR) nuclei with high statistical precision and well resolved individual element peaks from 10Ne to 40Zr. SuperTIGER also made exploratory measurements of the relative abundances up to 56Ba. Although the statistics are low for elements heavier than 40Zr, we pre-sent, for the first time, relative abundance measurements of charges Z = 41 -56 with individual element resolution. GCR measurements up to 40Zr support a source acceleration model where supernovae in OB associations preferentially accelerate refractory elements that are more readily embedded in interstellar dust grains than volatiles. In addition, injection into the GCR for both refractory and volatile ele-ments appears to follow a charge dependence consistent with their grain sputtering cross sections. By extending the GCR measurement range past 40Zr, we can begin to further constrain these models. (c) 2022 COSPAR. Published by Elsevier B.V. All rights reserved.

    DOI

    Scopus

    16
    被引用数
    (Scopus)

  • Observation of Spectral Structures in the Flux of Cosmic-Ray Protons from 50 GeV to 60 TeV with the Calorimetric Electron Telescope on the International Space Station

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

    Physical Review Letters   129 ( 10 )  2022年09月  [査読有り]

    DOI

  • CALET Search for Electromagnetic Counterparts of Gravitational Waves during the LIGO/Virgo O3 Run

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

    The Astrophysical Journal   933 ( 1 ) 85 - 85  2022年07月  [査読有り]

    　概要を見る

    Abstract

    The CALorimetric Electron Telescope (CALET) on the International Space Station consists of a high-energy cosmic-ray CALorimeter (CAL) and a lower-energy CALET Gamma-ray Burst Monitor (CGBM). CAL is sensitive to electrons up to 20 TeV, cosmic-ray nuclei from Z = 1 through Z ∼ 40, and gamma rays over the range 1 GeV–10 TeV. CGBM observes gamma rays from 7 keV to 20 MeV. The combined CAL-CGBM instrument has conducted a search for gamma-ray bursts (GRBs) since 2015 October. We report here on the results of a search for X-ray/gamma-ray counterparts to gravitational-wave events reported during the LIGO/Virgo observing run O3. No events have been detected that pass all acceptance criteria. We describe the components, performance, and triggering algorithms of the CGBM—the two Hard X-ray Monitors consisting of LaBr3(Ce) scintillators sensitive to 7 keV–1 MeV gamma rays and a Soft Gamma-ray Monitor BGO scintillator sensitive to 40 keV–20 MeV—and the high-energy CAL consisting of a charge detection module, imaging calorimeter, and the fully active total absorption calorimeter. The analysis procedure is described and upper limits to the time-averaged fluxes are presented.

    DOI

    Scopus

    13
    被引用数
    (Scopus)

  • Direct Measurement of the Nickel Spectrum in Cosmic Rays in the Energy Range from 8.8 GeV/ n to 240 GeV/ n with CALET on the International Space Station

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

    Physical Review Letters   128 ( 13 )  2022年04月  [査読有り]

    担当区分：責任著者

    　概要を見る

    The relative abundance of cosmic ray nickel nuclei with respect to iron is by far larger than for all other transiron elements; therefore it provides a favorable opportunity for a low background measurement of its spectrum. Since nickel, as well as iron, is one of the most stable nuclei, the nickel energy spectrum and its relative abundance with respect to iron provide important information to estimate the abundances at the cosmic ray source and to model the Galactic propagation of heavy nuclei. However, only a few direct measurements of cosmic-ray nickel at energy larger than ∼3 GeV/n are available at present in the literature, and they are affected by strong limitations in both energy reach and statistics. In this Letter, we present a measurement of the differential energy spectrum of nickel in the energy range from 8.8 to 240 GeV/n, carried out with unprecedented precision by the Calorimetric Electron Telescope (CALET) in operation on the International Space Station since 2015. The CALET instrument can identify individual nuclear species via a measurement of their electric charge with a dynamic range extending far beyond iron (up to atomic number Z=40). The particle's energy is measured by a homogeneous calorimeter (1.2 proton interaction lengths, 27 radiation lengths) preceded by a thin imaging section (3 radiation lengths) providing tracking and energy sampling. This Letter follows our previous measurement of the iron spectrum [1O. Adriani (CALET Collaboration), Phys. Rev. Lett. 126, 241101 (2021).PRLTAO0031-900710.1103/PhysRevLett.126.241101], and it extends our investigation on the energy dependence of the spectral index of heavy elements. It reports the analysis of nickel data collected from November 2015 to May 2021 and a detailed assessment of the systematic uncertainties. In the region from 20 to 240 GeV/n our present data are compatible within the errors with a single power law with spectral index -2.51±0.07.

    DOI PubMed

    Scopus

    37
    被引用数
    (Scopus)

  • Measurement of the Iron Spectrum in Cosmic Rays from 10 GeV/n to 2.0 TeV/n with the Calorimetric Electron Telescope on the International Space Station

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

    Physical Review Letters   126 ( 24 )  2021年06月  [査読有り]

    担当区分：責任著者

    　概要を見る

    The Calorimetric Electron Telescope (CALET), in operation on the International Space Station since 2015, collected a large sample of cosmic-ray iron over a wide energy interval. In this Letter a measurement of the iron spectrum is presented in the range of kinetic energy per nucleon from 10 GeV/n to 2.0 TeV/n allowing the inclusion of iron in the list of elements studied with unprecedented precision by space-borne instruments. The measurement is based on observations carried out from January 2016 to May 2020. The CALET instrument can identify individual nuclear species via a measurement of their electric charge with a dynamic range extending far beyond iron (up to atomic number Z=40). The energy is measured by a homogeneous calorimeter with a total equivalent thickness of 1.2 proton interaction lengths preceded by a thin (3 radiation lengths) imaging section providing tracking and energy sampling. The analysis of the data and the detailed assessment of systematic uncertainties are described and results are compared with the findings of previous experiments. The observed differential spectrum is consistent within the errors with previous experiments. In the region from 50 GeV/n to 2 TeV/n our present data are compatible with a single power law with spectral index -2.60±0.03.

    DOI PubMed

    Scopus

    75
    被引用数
    (Scopus)

  • Direct Measurement of the Cosmic-Ray Carbon and Oxygen Spectra from 10 GeV/ n to 2.2 TeV/ n with the Calorimetric Electron Telescope on the International Space Station

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

    Physical Review Letters   125 ( 25 )  2020年12月  [査読有り]

    担当区分：責任著者

    　概要を見る

    In this paper, we present the measurement of the energy spectra of carbon and oxygen in cosmic rays based on observations with the Calorimetric Electron Telescope on the International Space Station from October 2015 to October 2019. Analysis, including the detailed assessment of systematic uncertainties, and results are reported. The energy spectra are measured in kinetic energy per nucleon from 10 GeV/n to 2.2 TeV/n with an all-calorimetric instrument with a total thickness corresponding to 1.3 nuclear interaction length. The observed carbon and oxygen fluxes show a spectral index change of ∼0.15 around 200 GeV/n established with a significance >3σ. They have the same energy dependence with a constant C/O flux ratio 0.911±0.006 above 25 GeV/n. The spectral hardening is consistent with that measured by AMS-02, but the absolute normalization of the flux is about 27% lower, though in agreement with observations from previous experiments including the PAMELA spectrometer and the calorimetric balloon-borne experiment CREAM.

    DOI PubMed

    Scopus

    92
    被引用数
    (Scopus)

  • Direct Measurement of the Cosmic-Ray Proton Spectrum from 50 GeV to 10 TeV with the Calorimetric Electron Telescope on the International Space Station

    O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, E. Berti, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, P. Brogi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, T. Lomtadze, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, K. Mori, M. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, S. Nakahira, J. Nishimura, G. A. De Nolfo, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, F. Palma, P. Papini, A. V. Penacchioni, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, J. E. Suh, A. Sulaj, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, T. Terasawa, H. Tomida, S. Torii, Y. Tsunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida

    Physical Review Letters   122 ( 18 )  2019年05月  [査読有り]

    DOI PubMed

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    214
    被引用数
    (Scopus)

  • Measurements of Heavy Cosmic-Ray Nuclei Spectra with CALET on the ISS

    Yosui Akaike

    26TH EXTENDED EUROPEAN COSMIC RAY SYMPOSIUM   1181  2019年  [査読有り]

    担当区分：筆頭著者

    　概要を見る

    CALorimetric Electron Telescope (CALET) has been accumulating data of high-energy cosmic rays on the International Space Station since August 2015. In addition to the primary observation of the all-electron spectra, CALET also measures the spectra of nuclei, their relative abundances and secondary-to-primary ratios to the highest energy region ever directly observed in order to investigate details of their origin and propagation in the galaxy. The CALET instrument consists of two layers of segmented plastic scintillators to identify the individual elements from Z = 1 to 40, a 3 radiation length thick tungsten-scintillating fiber imaging calorimeter to obtain complementary charge and tracking information, and a 27 radiation length thick segmented PWO calorimeter to measure the energy. In this paper, the capability of CALET to perform nuclei measurements and preliminary energy spectra of heavy nuclei components using 962 days of data is presented.

    DOI

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    10
    被引用数
    (Scopus)

  • Characteristics and Performance of the CALorimetric Electron Telescope (CALET) Calorimeter for Gamma-Ray Observations

    N. Cannady, Y. Asaoka, F. Satoh, M. Tanaka, S. Torii, M. L. Cherry, M. Mori, O. Adriani, Y. Akaike, K. Asano, M. G. Bagliesi, E. Berti, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, P. Brogi, J. H. Buckley, G. Castellini, C. Checchia, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, M. Hareyama, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, T. Lomtadze, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, K. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, S. Nakahira, J. Nishimura, G. A.De Nolfo, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, F. Palma, P. Papini, A. V. Penacchioni, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, J. E. Suh, A. Sulaj, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, N. Tateyama, T. Terasawa, H. Tomida, Y. Tsunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida

    Astrophysical Journal, Supplement Series   238 ( 1 )  2018年09月  [査読有り]

    DOI

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    33
    被引用数
    (Scopus)

  • Search for GeV Gamma-Ray Counterparts of Gravitational Wave Events by CALET

    O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, E. Berti, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, P. Brogi, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, M. Hareyama, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, H. S. Krawczynski, J. F. Krizmanic, K. Kohri, T. Lomtadze, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, K. Mori, M. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, S. Nakahira, J. Nishimura, G. A. De Nolfo, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, F. Palma, P. Papini, A. V. Penacchioni, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, J. E. Suh, A. Sulaj, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, N. Tateyama, T. Terasawa, H. Tomida, S. Torii, Y. Tsunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida

    Astrophysical Journal   863 ( 2 )  2018年08月  [査読有り]

    DOI

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    30
    被引用数
    (Scopus)

  • On-orbit operations and offline data processing of CALET onboard the ISS

    Y. Asaoka, S. Ozawa, S. Torii, O. Adriani, Y. Akaike, K. Asano, M. G. Bagliesi, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, P. Brogi, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, M. Hareyama, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, A. Javaid, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, H. S. Krawczynski, J. F. Krizmanic, S. Kuramata, T. Lomtadze, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, K. Mizutani, A. A. Moiseev, K. Mori, M. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, S. Nakahira, J. Nishimura, G. A. de Nolfo, S. Okuno, J. F. Ormes, L. Pacini, F. Palma, P. Papini, A. V. Penacchioni, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, N. Tateyama, T. Terasawa, H. Tomida, Y. Tsunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, T. Yuda

    Astroparticle Physics   100   29 - 37  2018年07月  [査読有り]

    DOI

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    78
    被引用数
    (Scopus)

  • Extended Measurement of the Cosmic-Ray Electron and Positron Spectrum from 11 GeV to 4.8 TeV with the Calorimetric Electron Telescope on the International Space Station

    O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, E. Berti, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, P. Brogi, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, M. Hareyama, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, T. Lomtadze, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, K. Mori, M. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, S. Nakahira, J. Nishimura, G. A. De Nolfo, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, F. Palma, P. Papini, A. V. Penacchioni, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, J. E. Suh, A. Sulaj, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, N. Tateyama, T. Terasawa, H. Tomida, S. Torii, Y. Tsunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida

    Physical Review Letters   120 ( 26 )  2018年06月  [査読有り]

    DOI PubMed

    Scopus

    226
    被引用数
    (Scopus)

  • Energy Spectrum of Cosmic-Ray Electron and Positron from 10 GeV to 3 TeV Observed with the Calorimetric Electron Telescope on the International Space Station

    O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, P. Brogi, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, M. Hareyama, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, A. Javaid, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, H. S. Krawczynski, J. F. Krizmanic, S. Kuramata, T. Lomtadze, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, K. Mizutani, A. A. Moiseev, K. Mori, M. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, S. Nakahira, J. Nishimura, G. A. De Nolfo, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, F. Palma, P. Papini, A. V. Penacchioni, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, N. Tateyama, T. Terasawa, H. Tomida, S. Torii, Y. Tsunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, T. Yuda

    Physical Review Letters   119 ( 18 )  2017年11月  [査読有り]

    DOI PubMed

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    197
    被引用数
    (Scopus)

  • Relativistic electron precipitation at International Space Station: Space weather monitoring by Calorimetric Electron Telescope

    Ryuho Kataoka, Yoichi Asaoka, Shoji Torii, Toshio Terasawa, Shunsuke Ozawa, Tadahisa Tamura, Yuki Shimizu, Yosui Akaike, Masaki Mori

    GEOPHYSICAL RESEARCH LETTERS   43 ( 9 ) 4119 - 4125  2016年05月  [査読有り]

    DOI

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    34
    被引用数
    (Scopus)

  • Energy calibration of Calorimetric Electron Telescope (CALET) in space

    Tae Niita, Shoji Torii, Yosui Akaike, Yoichi Asaoka, Katsuaki Kasahara, Shunsuke Ozawa, Tadahisa Tamura

    ADVANCES IN SPACE RESEARCH   55 ( 11 ) 2500 - 2508  2015年06月  [査読有り]

    DOI

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    27
    被引用数
    (Scopus)

  • A balloon experiment using CALET prototype (bCALET-2)

    Tae Niita, Shoji Torii, Katsuaki Kasahara, Hiroyuki Murakami, Shunsuke Ozawa, Yoshitaka Ueyama, Yosui Akaike, Tadahisa Tamura, Kenji Yoshida, Yusaku Katayose, Yuki Shimizu, Hideyuki Fuke

    ADVANCES IN SPACE RESEARCH   55 ( 2 ) 753 - 760  2015年01月  [査読有り]

    DOI J-GLOBAL

    Scopus

    3
    被引用数
    (Scopus)

  • Beam test performance of a scintillator-based detector for the charge identification of relativistic ions

    P. S. Marrocchesi, O. Adriani, Y. Akaike, M. G. Bagliesi, A. Basti, G. Bigongiari, S. Bonechi, M. Bongi, M. Y. Kim, T. Lomtadze, P. Maestro, T. Niita, S. Ozawa, Y. Shimizu, S. Torii

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   659 ( 1 ) 477 - 483  2011年12月  [査読有り]

    DOI

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    70
    被引用数
    (Scopus)

  • Simulated performance of the calorimetric electron telescope (CALET) experiment（共著）

    AKAIKE Y, TAIRA K, KASAHARA K, TORII S, SHIMIZU Y, YOSHIDA K

    Adv. Space Res.   45 ( 5 ) 690 - 697  2010年03月  [査読有り]

    担当区分：筆頭著者

    DOI

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    8
    被引用数
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  • Expected Performance of CALET by Monte Carlo Simulation（共著）

    Akaike, Y, Kasahara, K, Torii, S, Shimizij, Y, Taira, K, Yoshida, K, Watanabe, I

    J. Phys. Soc. Jpn. Suppl. A   78 ( SUPPL. A ) 169 - 172  2009年  [査読有り]

    担当区分：筆頭著者

    DOI

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    1
    被引用数
    (Scopus)

  • Balloon borne experiment with CALET prototype

    Y. Shimizu, S. Torii, K. Kasahara, Y. Akaike, Y. Fukuta, K. Hidaka, K. Taira, T. Tamura, K. Yoshida, Y. Katayose, H. Murakami

    Journal of the Physical Society of Japan   78 ( Suppl.A ) 165 - 168  2009年  [査読有り]

    DOI

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    4
    被引用数
    (Scopus)

  • Charge–Sign Dependent Drift Effects in the Time–Lag of Cosmic–Ray Variation Relative to Solar Activity Observed with the Calorimetric Electron Telescope (CALET)

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

    Progress of Theoretical and Experimental Physics   2026 ( 3 ) 033F01  2026年02月  [査読有り]

    　概要を見る

    Abstract

    The 11-yr variation of galactic cosmic-ray flux lags behind the variation of the sunspot number. An average $\sim$1-yr time-lag is expected from the outward propagating solar wind with the frozen-in photospheric magnetic field varying in the solar cycle, and from the inward diffusive transport of cosmic-ray particles. The long-term neutron monitor data, however, show that the time-lag is significantly longer (shorter) in the odd (even) solar cycle. In this paper, we analyze the time-lag in proton and electron fluxes observed by the Calorimetric Electron Telescope (CALET). It is found that the time-lag is similar in proton and electron fluxes during an $A &amp;gt; 0$ polarity epoch of the solar dipole magnetic field. In an even solar cycle 24 including a polarity reversal from $A &amp;lt; 0$ to $A &amp;gt; 0$, on the other hand, it is found that the time-lag of proton (electron) flux variation is significantly shorter (longer) than the average $\sim$1-yr lag by analyzing the combined data with CALET and AMS-02. This is the first observation of the charge-sign dependent time-lag. We demonstrate that these observations can be qualitatively interpreted in terms of different 11-yr time profiles of proton and electron fluxes in $A &amp;gt; 0$ and $A &amp;lt; 0$ epochs expected from the drift effect.

    DOI

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  • Effects of the May 2024 Solar Storm on the Earth's Radiation Belts Observed by CALET on the International Space Station

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

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     1293 - 1293  2025年09月

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  • Cosmic-ray modulation over the past 10 years observed with CALET on the International Space Station

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

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     1337 - 1337  2025年09月

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  • Nine years of gamma-ray burst observations with the CALET Gamma-ray Burst Monitor

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

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     937 - 937  2025年09月

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  • Improving electron/proton discrimination at high energies with CALET on the International Space Station

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

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     011 - 011  2025年09月

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  • Characterisation of backscattering effects in CALET due to hadronic showers generated in the calorimeter

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

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     039 - 039  2025年09月

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  • CALET on-orbit operations and data calibration for 10 years observation on the International Space Station

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

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     058 - 058  2025年09月

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  • Boosted-Decision-Trees based analysis for the measurement of light elements fluxes with CALET

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

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     083 - 083  2025年09月

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  • Progress Toward Reproducing the GeV Galactic Center Excess Using CALET Data

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

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     613 - 613  2025年09月

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  • Energy spectra and flux ratios of BCNO cosmic-ray nuclei measured by CALET up to multi-TeV energies

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

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     077 - 077  2025年09月

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  • Extended measurement of the proton spectrum with CALET on the International Space Station

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

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     059 - 059  2025年09月

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  • CALET's sensitivity to electron cosmic-ray spectral and anisotropy signatures of the Vela SNR

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

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     099 - 099  2025年09月

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  • A deep learning method for event recognition in CALET data

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

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     113 - 113  2025年09月

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  • Updated Limits on Anisotropy in Electron+Positron Cosmic Rays from CALET Data

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

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     100 - 100  2025年09月

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  • Measurement of Cr and Ti fluxes and sub-iron/iron flux ratios with CALET on the International Space Station

    Francesco Stolzi, Caterina Checchia, Yosui Akaike

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     136 - 136  2025年09月

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  • Direct measurement of the all-particle spectrum up to the PeV region with CALET on the International Space Station

    Yosui Akaike, Shoji Torii, Kazuyoshi Kobayashi

    Proceedings of 39th International Cosmic Ray Conference — PoS(ICRC2025)     004 - 004  2025年09月

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  • Detected Abundances of Nuclei Relative to 26Fe for Elements 14Si through 44Ru with CALET on the International Space Station

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

    The Astrophysical Journal   988 ( 2 ) 148 - 148  2025年07月

    　概要を見る

    Abstract

    The Calorimetric Electron Telescope (CALET), launched to the International Space Station (ISS) in 2015 August and continuously operating since, measures cosmic-ray (CR) electrons, nuclei, and gamma rays. CALET, with its 27 radiation length deep Total Absorption Calorimeter, measures particle energy and allows for the measurement of spectra, secondary to primary ratios of the more abundant CR nuclei through 28Ni, while the main charge detector can measure ultra-heavy CR nuclei through 44Ru. The results for the abundances of elements from Z = 14 to Z = 44 relative to 26Fe over 7.5 yr of observation are presented here and compared to previous measurements from ACE-CRIS, SuperTIGER, and HEAO-3.

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  • Exploring Outer Radiation Belt Losses From the International Space Station

    Xiao‐Jia Zhang, Anton Artemyev, Yuto Katoh, Yikai Hsieh, Vassilis Angelopoulos, Shoji Torii, Ryuho Kataoka, Yosui Akaike, Satoshi Nakahira

    Geophysical Research Letters    2025年07月

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  • The iron and nickel spectra measured with CALET on the international space station

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

    International Journal of Modern Physics A    2025年01月

    　概要を見る

    Recent direct measurements of the energy spectra of the charged cosmic ray have revealed unexpected spectral features, most notably the onset of a progressive hardening at few hundreds of GeV/n not only of proton and He spectra but also observable for heavier nuclei. Thus, the study of the spectra behavior of heavy elements may shed light on understanding propagation and acceleration phenomena in our Galaxy. In particular, Fe and Ni provide favorable conditions for observations thanks to the low background contamination from spallation of higher mass elements they are affected by. The CALorimetric Electron Telescope, CALET, has been measuring high-energy cosmic rays on the International Space Station since October 2015. The instrument consists of two layers of segmented plastic scintillators, a 3 radiation length thick tungsten-scintillating fiber imaging calorimeter and a 27 radiation length thick PWO calorimeter. It identifies the charge of individual elements up to Ni and beyond and it measures the energy of cosmic-ray nuclei providing a direct measurement of their spectra. In this contribution, the iron and nickel spectra, resulted after 5 years of data acquisition, are presented in the energy range between 10 and 2000 GeV/n and between 8.8 and 240 GeV/n, respectively. The analysis procedure and the assessment of systematic errors are detailed, in addition to the ratio between the two fluxes. Both spectra show similar shape and energy dependence.

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  • The Calorimetric Electron Telescope (CALET) on the International Space Station: Results from the first eight years on orbit

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

    Advances in Space Research    2024年04月

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  • Direct measurements of cosmic – Ray iron and nickel with CALET on the International Space Station

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

    Advances in Space Research    2024年03月

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  • From SuperTIGER to TIGERISS

    B. F. Rauch, W. V. Zober, Q. Abarr, Y. Akaike, W. R. Binns, R. F. Borda, R. G. Bose, T. J. Brandt, D. L. Braun, J. H. Buckley, N. W. Cannady, S. Coutu, R. M. Crabill, P. F. Dowkontt, M. H. Israel, M. Kandula, J. F. Krizmanic, A. W. Labrador, W. Labrador, L. Lisalda, J. V. Martins, M. P. McPherson, R. A. Mewaldt, J. G. Mitchell, J. W. Mitchell, S. A. I. Mognet, R. P. Murphy, G. A. de Nolfo, S. Nutter, M. A. Olevitch, N. E. Osborn, I. M. Pastrana, K. Sakai, M. Sasaki, S. Smith, H. A. Tolentino, N. E. Walsh, J. E. Ward, D. Washington, A. T. West, L. P. Williams

    Instruments    2024年01月

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  • Erratum: Charge-Sign Dependent Cosmic-Ray Modulation Observed with the Calorimetric Electron Telescope on the International Space Station [Phys. Rev. Lett. 130, 211001 (2023)

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

    Physical review letters   131 ( 10 ) 109902  2023年09月

    　概要を見る

    This corrects the article DOI: 10.1103/PhysRevLett.130.211001.

    DOI PubMed

  • The cosmic-ray electron and positron spectrum measured with CALET on the International Space Station

    Yosui Akaike, Oscar Adriani, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年08月

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  • Results from CALorimetric Electron Telescope (CALET) Observations of Gamma-rays on the International Space Station

    Masaki Mori, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年08月

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  • Optimization of the proton background rejection in the measurement of the electron flux at high energies with CALET on the International Space Station

    Sandro Gonzi, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年08月

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  • Results of the Ultra-Heavy Cosmic-Ray Analysis with CALET on the International Space Station

    Wolfgang V Zober, Brian Flint Rauch, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年08月

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  • Feasibility study on an analysis of CR helium flux with the CALET detector based on an extended acceptance

    Marco Mattiazzi, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年08月

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  • Dark Matter Limits from the CALET Electron+Positron Spectrum with Individual Astrophysical Source Background

    Holger Motz, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年08月

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  • Interpretation of the CALET Electron+Positron Spectrum by Astrophysical Sources

    Holger Motz, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年08月

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  • Cosmic-Ray Modulation during Solar Cycles 24-25 Transition Observed with CALET on the International Space Station

    Shoko Miyake, Oscar Adriani, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober, Kazuoki Munakata, Yosui Akaike

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年08月

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  • Observation of spectral structures in the flux of cosmic ray protons with CALET on the International Space Station

    Kazuyoshi Kobayashi, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年08月

    DOI

  • CALET Search for electromagnetic counterparts of gravitational waves in O4

    Yuta Kawakubo, Michael L. Cherry, Takanori Sakamoto, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年08月

    DOI

  • Flux ratios of primary elements measured by CALET on the International Space Station

    Caterina Checchia, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年08月

    DOI

  • Iron and Nickel fluxes measured by CALET on the International Space Station

    Francesco Stolzi, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年08月

    DOI

  • Refinement of the High-Energy Gamma-ray Selection for CALET on the International Space Station

    Nicholas W Cannady, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年07月

    DOI

  • Statistical analysis into the drivers behind relativistic electron precipitation events observed by CALET on the International Space Station

    Anthony Ficklin, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年07月

    DOI

  • Status of the operations of CALET for 7.5 years on the International Space Station

    Tadahisa Tamura, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年07月

    DOI

  • Observational Challenges on the ISS: A Case Study with CALET

    Nicholas W Cannady, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年07月

    DOI

  • Event-by-Event Analysis for TeV Electron Candidates with CALET on the International Space Station

    Nicholas W Cannady, Yosui Akaike, Shoji Torii, Oscar Adriani, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年07月

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  • Boron flux in cosmic rays and its flux ratio to primary species measured with CALET on the International Space Station

    Paolo Maestro, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年07月

    DOI

  • Measurement of iron cosmic-ray primaries below 10 GeV/n by use of the geomagnetic effect with CALET

    Masakatsu Ichimura, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Paolo Brogi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年07月

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

    Paolo Brogi, Oscar Adriani, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, Massimo Bongi, Alessandro Bruno, Nicholas Wade Cannady, Guide Castellini, Caterina Checchia, Walter Robert Cherry, Gianmaria Collazuol, Georgia A. de Nolfo, Ken Ebisawa, Anthony W. Ficklin, Hideyuki Fuke, Sandro Gonzi, T. Gregory Guzik, Thomas Hams, Kinya Hibino, Masakatsu Ichimura, Kunihito Ioka, Wataru Ishizaki, Martin H. Israel, Katsumasa Kasahara, Jun Kataoka, Ryuho Kataoka, Yusaku Katayose, Chihiro Kato, Norita Kawanaka, Yuta Kawakubo, Kenko Kobayashi, Kazunori Kohri, Henric S. Krawczynski, John F. Krizmanic, Paolo Maestro, Pier Simone Marrocchesi, Alberto Maria Messineo, Jason W. Mitchell, Shoko Miyake, Alexander Moiseev, Masaki Mori, Nicola Mori, Holger Martin Motz, Kazuoki Munakata, Satoshi Nakahira, Jun Nishimura, Shoji Okuno, Jonathan Ormes, Shunsuke OZAWA, Lorenzo Pacini, Paolo Pacini, Brian Flint Rauch, Ricciarini Ricciarini, Kazuhiro Sakai, Takanori Sakamoto, Makoto Sasaki, Yuki Shimizu, Atsushi Shiomi, Piero Spillantini, Francesco Stolzi, Satoshi Sugita, Arta Sulaj, Masato Takita, Tadahisa Tamura, Toshio Terasawa, Shoji Torii, Yoshiki Tsunesada, Yukio Uchihori, Elena Vannuccini, John P. Wefel, Kazutaka Yamaoka, Shohei Yanagita, Atsumasa Yoshida, Kenji Yoshida, Wolfgang V Zober

    Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)    2023年07月

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  • CALET on the International Space Station: a precise measurement of the iron spectrum

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

    Proceedings of Science   398  2022年05月

    　概要を見る

    The Calorimetric Electron Telescope (CALET) was launched on the International Space Station in 2015 and since then has collected a large sample of cosmic-ray charged particles over a wide energy. Thanks to a couple of layers of segmented plastic scintillators placed on top of the detector, the instrument is able to identify the charge of individual elements from proton to iron (and above). The imaging tungsten scintillating fiber calorimeter provides accurate particle tracking and the lead tungstate homogeneous calorimeter can measured the energy with a wide dynamic range. One of the CALET scientific objectives is to measure the energy spectra of cosmic rays to shed light on their acceleration and propagation in the Galaxy. By the observation in first five years, a precise measurement of the iron spectrum is now available in the range of kinetic energy per nucleon from 10 GeV/n to 2 TeV/n. The CALET's result with a description of the analysis and details on systematic uncertainties will be illustrated. Also, a comparison with previous experiments' results is given.

  • Investigating the Vela SNR's Emission of Electron Cosmic Rays with CALET at the International Space Station

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

    Proceedings of Science, 37th International Cosmic Ray Conference   Volume 395 ( 100 )  2022年03月

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  • Monte Carlo Study of Electron and Positron Cosmic-Ray Propagation with the CALET Spectrum

    Katsuaki Asano, Yoichi Asaoka, Yosui Akaike, Norita Kawanaka, Kazunori Kohri, Holger M. Motz, Toshio Terasawa

    ASTROPHYSICAL JOURNAL   926 ( 1 ) 5 - 5  2022年02月  [査読有り]

    　概要を見る

    <title>Abstract</title>
    Focusing on the electron and positron spectrum measured with the Calorimetric Electron Telescope (CALET), which shows characteristic structures, we calculate the flux contributions of cosmic rays that have escaped from randomly appearing supernova remnants. We adopt a Monte Carlo method to take into account the stochastic nature of the appearance of nearby sources. We find that without a complicated energy dependence of the diffusion coefficient, simple power-law diffusion coefficients can produce spectra similar to the CALET spectrum, even with a dispersion in the injection index. The positron component measured with AMS-02 is consistent with a bump-like structure around 300 GeV in the CALET spectrum. One to three nearby supernovae can contribute up to a few tens of percent of the CALET flux at 2–4 TeV, while ten or more unknown and distant (≳500 pc) supernovae account for the remaining several tens of percent of the flux. The CALET spectrum, showing a sharp drop at ∼1 TeV, allows for a contribution of cosmic rays from an extraordinary event that occurred ∼400 kyr ago. This type of event releases electrons/positrons with a total energy more than 10 times the average energy for usual supernovae, and its occurrence rate is lower than one three-hundredth of the usual supernova rate.

    DOI

    Scopus

    10
    被引用数
    (Scopus)

  • CALET Observations during the First 5 Years on the ISS

    P. S. Marrocchesi, O. Adriani, Y. Akaike, Y. Asaoka, E. Berti, G. Bigongiari, M. Bongi, P. Brogi, A. Bruno, N. Cannady, C. Checchia, M. L. Cherry, G. Collazuol, A. W. Ficklin, T. G. Guzik, M. Ichimura, M. H. Israel, K. Kasahara, Y. Kawakubo, J. F. Krizmanic, A. M. Messineo, J. W. Mitchell, S. Miyake, M. Mori, N. Mori, H. M. Motz, K. Munakata, L. Pacini, F. Palma, P. Papini, B. F. Rauch, S. B. Ricciarini, T. Sakamoto, M. Sasaki, F. Stolzi, A. Sulaj, T. Tamura, S. Torii, J. P. Wefel, K. Yoshida, W. V. Zober

    Physics of Atomic Nuclei   84 ( 6 ) 985 - 994  2021年11月

    　概要を見る

    The CALorimetric Electron Telescope CALET is collecting science data on the International Space Station since October 2015 with excellent and continuous performance. Energy is measured with a deep homogeneous calorimeter (1.2 nuclear interaction lengths, 27 radiation lengths) preceded by an imaging pre-shower (3 radiation lengths, 1mm granularity) providing tracking and 10-5 electron/proton discrimination. Two independent sub-systems identify the charge Z of the incident particle from proton to iron and above (Z<40). CALET measures the cosmic-ray electron + positron flux up to 20 TeV, gamma rays up to 10 TeV, and nuclei up to the PeV scale. In this paper, we report the on-orbit performance of the instrument and summarize the main results obtained during the first 5 years of operation, including the electron + positron energy spectrum and the individual spectra of protons, heavier nuclei and iron. Solar modulation and gamma-ray observations are also concisely reported, as well as transient phenomena and the search for gravitational wave counterparts.

    DOI

    Scopus

    3
    被引用数
    (Scopus)

  • CALET on the International Space Station: The first three years of observations

    P. Brogi, P. Brogi, O. Adriani, O. Adriani, Y. Akaike, Y. Akaike, K. Asano, Y. Asaoka, Y. Asaoka, M. G. Bagliesi, M. G. Bagliesi, E. Berti, E. Berti, G. Bigongiari, G. Bigongiari, W. R. Binns, S. Bonechi, S. Bonechi, M. Bongi, M. Bongi, A. Bruno, J. H. Buckley, N. Cannady, N. Cannady, G. Castellini, C. Checchia, C. Checchia, M. L. Cherry, G. Collazuol, G. Collazuol, V. Di Felice, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, N. Kawanaka, Y. Kawakubo, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, J. F. Krizmanic, J. Link, J. Link, P. Maestro, P. Maestro, P. S. Marrocchesi, P. S. Marrocchesi, A. M. Messineo, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, A. A. Moiseev, M. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, S. Nakahira, J. Nishimura, G. A. De Nolfo, S. Okuno, J. F. Ormes, N. Ospina, S. Ozawa, L. Pacini, F. Palma, F. Palma, P. Papini, B. F. Rauch, S. B. Ricciarini, S. B. Ricciarini, K. Sakai, K. Sakai, T. Sakamoto, M. Sasaki, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, F. Stolzi, S. Sugita, J. E. Suh, J. E. Suh, A. Sulaj

    Physica Scripta   95 ( 7 )  2020年07月

    　概要を見る

    The CALorimetric Electron Telescope CALET is a space instrument designed to carry out precision measurements of high energy cosmic-rays on the JEM-EF external platform on the International Space Station, where it has been collecting science data continuously since mid October 2015. In addition to its primary goal of identifying nearby sources of high-energy electrons and possible signatures of dark matter in the electron spectrum, CALET is carrying out extensive measurements of the energy spectra, relative abundances and secondary-to-primary ratios of elements from proton to iron, and even above (up to Z = 40), studying the details of galactic particle propagation and acceleration. An overview of CALET based on the data taken during the first three years of observations is presented, including a direct measurement of the electron+positron energy spectrum from 11 GeV to 4.8 TeV. The proton spectrum has been measured from 50 GeV to 10 TeV covering, for the first time with a single space-borne instrument, the whole energy interval previously investigated in separate sub-ranges by magnetic spectrometers and calorimetric instruments. Preliminary spectra of cosmic-ray nuclei are also presented, together with gamma-ray observations and searches for an e.m. counterpart of LIGO/Virgo GW events.

    DOI

    Scopus

    5
    被引用数
    (Scopus)

  • CALET results after three years on the International Space Station

    Y. Asaoka, O. Adriani, Y. Akaike, K. Asano, M. G. Bagliesi, E. Berti, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, J. Link, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, M. Mori, N. Mori, H. M. Motz, K. Munakata, S. Nakahira, J. Nishimura, G. A. De Nolfo, S. Okuno, N. Opsina, J. F. Ormes, S. Ozawa, L. Pacini, F. Palma, V. Pal'Shin, P. Papini, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, S. Sugita, J. E. Suh, A. Sulaj, I. Takahashi, M. Takita, T. Tamura, T. Terasawa, S. Torii, Y. Tsunesada, Y. Uchihori, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida

    Journal of Physics: Conference Series   1468 ( 1 )  2020年03月

    　概要を見る

    The CALET (CALorimetric Electron Telescope) space experiment, which is currently conducting direct cosmic-ray observations onboard the International Space Station (ISS), is an all-calorimetric instrument optimized for cosmic-ray electron measurements with capability to measure hadrons and gamma-rays. Since the start of observation in October 2015, smooth and continuous operations have taken place. In this paper, we will give a brief summary of the CALET observations ranging from charged cosmic rays, gamma-rays, to space weather, while focusing on the energy spectra of electrons and protons.

    DOI

    Scopus

    2
    被引用数
    (Scopus)

  • CALET Results after Three Years on Orbit on the International Space Station

    P. Maestro, O. Adriani, Y. Akaike, Y. Asaoka, E. Berti, G. Bigongiari, M. Bongi, P. Brogi, A. Bruno, N. Cannady, C. Checchia, M. L. Cherry, G. Collazuol, T. G. Guzik, M. Ichimura, M. H. Israel, K. Kasahara, Y. Kawakubo, J. F. Krizmanic, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, M. Mori, N. Mori, H. M. Motz, K. Munakata, L. Pacini, F. Palma, P. Papini, B. F. Rauch, S. B. Ricciarini, T. Sakamoto, M. Sasaki, F. Stolzi, A. Sulaj, T. Tamura, S. Torii, J. P. Wefel, K. Yoshida

    Physics of Atomic Nuclei   82 ( 6 ) 766 - 772  2019年11月

    DOI

  • The CALorimetric Electron Telescope (CALET) on the international space station: Results from the first two years on orbit

    Y. Asaoka, O. Adriani, Y. Akaike, K. Asano, M. G. Bagliesi, E. Berti, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, A. Bruno, P. Brogi, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, T. Lomtadze, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, K. Mori, M. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, S. Nakahira, J. Nishimura, G. A. De Nolfo, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, F. Palma, V. Pal'Shin, P. Papini, A. V. Penacchioni, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, S. Sugita, J. E. Suh, A. Sulaj, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, N. Tateyama, T. Terasawa, H. Tomida, S. Torii, Y. Tsunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida

    Journal of Physics: Conference Series   1181 ( 1 )  2019年03月  [査読有り]

    　概要を見る

    © Published under licence by IOP Publishing Ltd. The CALorimetric Electron Telescope (CALET) is a high-energy astroparticle physics space experiment installed on the International Space Station (ISS), developed and operated by Japan in collaboration with Italy and the United States. The CALET mission goals include the investigation of possible nearby sources of high-energy electrons, of the details of galactic particle acceleration and propagation, and of potential signatures of dark matter. CALET measures the cosmic-ray electron+positron flux up to 20 TeV, gamma-rays up to 10 TeV, and nuclei with Z=1 to 40 up to 1, 000 TeV for the more abundant elements during a long-term observation aboard the ISS. Starting science operation in mid-October 2015, CALET performed continuous observation without major interruption with close to 20 million triggered events over 10 GeV per month. Based on the data taken during the first two-years, we present an overview of CALET observations: 1) Electron+positron energy spectrum, 2) Nuclei analysis, 3) Gamma-ray observation including a characterization of on-orbit performance. Results of the electromagnetic counterpart search for LIGO/Virgo gravitational wave events are discussed as well.

    DOI

    Scopus

    23
    被引用数
    (Scopus)

  • Solar modulation of galactic cosmic-ray electrons measured with CALET

    Shoko Miyake, Yotaro Migita, Yoichi Asaoka, Yosui Akaike, Shoji Torii, Toshio Terasawa, Ryuho Kataoka, Kenichi Sakai

    Proceedings of Science   358  2019年

    　概要を見る

    The CALorimetric Electron Telescope (CALET) installed on the International Space Station has multiple event trigger modes for measuring high-energy particles and gamma rays. The observations of the low-energy cosmic-ray (CR) electrons (electrons + positrons) in an energy region from 1 GeV to 10 GeV have been successfully performed by a low-energy shower trigger mode working in the geomagnetic polar regions. The continuous measurements of the low-energy CR electrons may provide a crucial key to the understanding of the solar modulation of the galactic cosmic rays. Here we have analyzed the low-energy CR electrons measured by CALET over the past three years to investigate the solar modulation of the CR electrons. We have obtained the continuous variation of the low-energy electron flux increasing as time passes, which have been expected from a recent weakening solar cycle. We have also confirmed that there are additional small fluctuations in the flux, that has a potential to be explained by the effects of the interplanetary coronal mass ejections or the co-rotating interaction region of the solar wind.

  • Energy calibration of CALET onboard the International Space Station

    Y. Asaoka, Y. Akaike, Y. Komiya, R. Miyata, S. Torii, O. Adriani, K. Asano, M. G. Bagliesi, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, P. Brogi, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, M. Hareyama, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, A. Javaid, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, H. Kitamura, H. S. Krawczynski, J. F. Krizmanic, S. Kuramata, T. Lomtadze, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, K. Mizutani, A. A. Moiseev, K. Mori, M. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, Y. E. Nakagawa, S. Nakahira, J. Nishimura, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, F. Palma, P. Papini, A. V. Penacchioni, B. F. Rauch, S. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, N. Tateyama, T. Terasawa, H. Tomida, Y. Tsunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, T. Yuda

    Astroparticle Physics   91   1 - 10  2017年05月

    DOI

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    97
    被引用数
    (Scopus)

  • CALET UPPER LIMITS on X-RAY and GAMMA-RAY COUNTERPARTS of GW151226

    O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, P. Brogi, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, M. Hareyama, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, A. Javaid, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, H. Kitamura, H. S. Krawczynski, J. F. Krizmanic, S. Kuramata, T. Lomtadze, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, K. Mizutani, A. A. Moiseev, K. Mori, M. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, Y. E. Nakagawa, S. Nakahira, J. Nishimura, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, F. Palma, P. Papini, A. V. Penacchioni, B. F. Rauch, S. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, N. Tateyama, T. Terasawa, H. Tomida, S. Torii, Y. Tsunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, T. Yuda

    Astrophysical Journal Letters   829 ( 1 )  2016年09月

    DOI

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    39
    被引用数
    (Scopus)

  • 19aAZ-3 CALET地上データ監視システム運用

    山口 優幸, 鳥居 祥二, 浅岡 陽一, 笠原 克昌, 赤池 陽水, 小澤 俊介, 神尾 泰樹, 佐藤 郁也, 竹本 翔一, 宮田 諒平, CALETチーム

    日本物理学会講演概要集   71   458 - 458  2016年

    DOI CiNii

  • 19aAZ-2 ISS軌道上におけるCALETの電子観測条件最適化

    浅岡 陽一, 鳥居 祥二, 笠原 克昌, 赤池 陽水, 小澤 俊介, 安藤 祐貴, 神尾 泰樹, 佐藤 郁也, 竹本 翔一, 田中 瑞樹, 宮田 諒平, 山口 優幸, 大和 啓一, Motz Holger, 清水 雄輝, 田村 忠久, 上野 史郎, 冨田 洋, CALET チーム

    日本物理学会講演概要集   71   457 - 457  2016年

    DOI CiNii

  • 19aAZ-5 CALET軌道上データのイベント選別アルゴリズム

    竹本 翔一, 鳥居 祥二, 浅岡 陽一, 笠原 克昌, 赤池 陽水, 小澤 俊介, 神尾 泰樹, 田中 瑞樹, 宮田 諒平, 山口 優幸, CALETチーム

    日本物理学会講演概要集   71   460 - 460  2016年

    DOI CiNii

  • 19aAZ-4 軌道上データを用いたCALET検出器のMIP較正

    小宮 優馬, 鳥居 祥二, 笠原 克晶, 赤池 陽水, 浅岡 陽一, 小澤 俊介, Motz Holger, 清水 雄輝, 田村 忠久, CALETチーム

    日本物理学会講演概要集   71   459 - 459  2016年

    DOI CiNii

  • 19aAZ-7 CALET観測における宇宙線到来方向の決定方法

    佐藤 郁也, 鳥居 祥二, 浅岡 陽一, 笠原 克昌, 赤池 陽水, 小澤 俊介, 竹本 翔一, 中平 聡, CALET チーム

    日本物理学会講演概要集   71   461 - 461  2016年

    DOI CiNii

  • The CALorimetric Electron Telescope (CALET) for high-energy astroparticle physics on the International Space Station

    O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, J. H. Buckley, G. Castellini, M. L. Cherry, G. Collazuol, K. Ebisawa, V. Di Felice, H. Fuke, T. G. Guzik, T. Hams, M. Hareyama, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, M. H. Israel, A. Javaid, E. Kamioka, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, N. Kawanaka, H. Kitamura, T. Kotani, H. S. Krawczynski, J. F. Krizmanic, A. Kubota, S. Kuramata, T. Lomtadze, P. Maestro, L. Marcelli, P. S. Marrocchesi, J. W. Mitchell, S. Miyake, K. Mizutani, A. A. Moiseev, K. Mori, M. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, Y. E. Nakagawa, S. Nakahira, J. Nishimura, S. Okuno, J. F. Ormes, S. Ozawa, F. Palma, P. Papini, B. F. Rauch, S. B. Ricciarini, T. Sakamoto, M. Sasaki, M. Shibata, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, N. Tateyama, T. Terasawa, H. Tomida, S. Torii, Y. Tunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, T. Yuda

    Journal of Physics: Conference Series   632 ( 1 )  2015年08月

    　概要を見る

    The CALorimetric Electron Telescope (CALET) is a space experiment, currently under development by Japan in collaboration with Italy and the United States, which will measure the flux of cosmic-ray electrons (and positrons) up to 20 TeV energy, of gamma rays up to 10 TeV, of nuclei with Z from 1 to 40 up to 1 PeV energy, and will detect gamma-ray bursts in the 7 keV to 20 MeV energy range during a 5 year mission. These measurements are essential to investigate possible nearby astrophysical sources of high energy electrons, study the details of galactic particle propagation and search for dark matter signatures. The main detector of CALET, the Calorimeter, consists of a module to identify the particle charge, followed by a thin imaging calorimeter (3 radiation lengths) with tungsten plates interleaving scintillating fibre planes, and a thick energy measuring calorimeter (27 radiation lengths) composed of lead tungstate logs. The Calorimeter has the depth, imaging capabilities and energy resolution necessary for excellent separation between hadrons, electrons and gamma rays. The instrument is currently being prepared for launch (expected in 2015) to the International Space Station ISS, for installation on the Japanese Experiment Module - Exposure Facility (JEM-EF).

    DOI

    Scopus

    12
    被引用数
    (Scopus)

  • The CALorimetric Electron Telescope (CALET) for high-energy astroparticle physics on the International Space Station

    O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, J. H. Buckley, G. Castellini, M. L. Cherry, G. Collazuol, K. Ebisawa, V. Di Felice, H. Fuke, T. G. Guzik, T. Hams, M. Hareyama, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, M. H. Israel, A. Javaid, E. Kamioka, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, N. Kawanaka, H. Kitamura, T. Kotani, H. S. Krawczynski, J. F. Krizmanic, A. Kubota, S. Kuramata, T. Lomtadze, P. Maestro, L. Marcelli, P. S. Marrocchesi, J. W. Mitchell, S. Miyake, K. Mizutani, A. A. Moiseev, K. Mori, M. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, Y. E. Nakagawa, S. Nakahira, J. Nishimura, S. Okuno, J. F. Ormes, S. Ozawa, F. Palma, P. Papini, B. F. Rauch, S. B. Ricciarini, T. Sakamoto, M. Sasaki, M. Shibata, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, N. Tateyama, T. Terasawa, H. Tomida, S. Torii, Y. Tunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, T. Yuda

    EPJ Web of Conferences   95  2015年05月

    　概要を見る

    The CALorimetric Electron Telescope (CALET) is a space experiment, currently under development by Japan in collaboration with Italy and the United States, which will measure the flux of cosmic-ray electrons (and positrons) up to 20 TeV energy, of gamma rays up to 10 TeV, of nuclei with Z from 1 to 40 up to 1 PeV energy, and will detect gamma-ray bursts in the 7 keV to 20 MeV energy range during a 5 year mission. These measurements are essential to investigate possible nearby astrophysical sources of high energy electrons, study the details of galactic particle propagation and search for dark matter signatures. The main detector of CALET, the Calorimeter, consists of a module to identify the particle charge, followed by a thin imaging calorimeter (3 radiation lengths) with tungsten plates interleaving scintillating fibre planes, and a thick energy measuring calorimeter (27 radiation lengths) composed of lead tungstate logs. The Calorimeter has the depth, imaging capabilities and energy resolution necessary for excellent separation between hadrons, electrons and gamma rays. The instrument is currently being prepared for launch (expected in 2015) to the International Space Station ISS, for installation on the Japanese Experiment Module - Exposure Facility (JEM-EF).

    DOI

    Scopus

    1
    被引用数
    (Scopus)

  • 26pSJ-3 CALET観測模擬データを用いた軌道上観測条件の最適化

    大和 啓一, 鳥居 祥二, 浅岡 陽一, 笠原 克昌, 赤池 陽水, 小澤 俊介, 神尾 泰樹, 竹本 翔一, 山口 優幸, Motz Holger, 清水 雄輝, 田村 忠久, 上野 史郎, 冨田 洋, CALETチーム

    日本物理学会講演概要集   70   366 - 366  2015年

    DOI CiNii

  • 26pSJ-8 CERN-SPS重イオンビーム試験によるCALET-CHDの電荷分解能

    岡田 侑子, 鳥居 祥二, 浅岡 陽一, 笠原 克昌, 小澤 俊介, 赤池 陽水, 田中 真文, 土川 恵理子, Motz Holger, 田村 忠久, CALETチーム

    日本物理学会講演概要集   70   367 - 367  2015年

    DOI CiNii

  • 21pDC-5 CALET軌道上運用開始に向けたデータ管制システムの開発

    神尾 泰樹, 鳥居 祥二, 小澤 俊介, 下村 健太, 仁井田 多絵, 力石 和樹, 浅岡 陽一, 笠原 克昌, Motz Holger, 田村 忠久, 清水 雄輝, 赤池 陽水, CALETチーム

    日本物理学会講演概要集   70   400 - 400  2015年

    DOI CiNii

  • 26pSJ-2 Waseda CALET Operations Center (WCOC)におけるミッション運用

    浅岡 陽一, 鳥居 祥二, 赤池 陽水, 小澤 俊介, 笠原 克昌, 神尾 泰樹, 竹本 翔一, 仁井田 多絵, 山口 優幸, 大和 啓一, Motz Holger, 清水 雄輝, 田村 忠久, 上野 史郎, 冨田 洋, CALETチーム

    日本物理学会講演概要集   70   365 - 365  2015年

    DOI CiNii

  • 21pDC-9 Expected Dark Matter Sensitivity of CALET in Relation to Present and Future AMS-02 Observation

    Motz Holger, Asaoka Yoichi, Torii Shoji, Bhattacharyya Saptashwa, Niita Tae, Okada Yuko, Akaike Yosui, CALET collaboration

    日本物理学会講演概要集   70   402 - 402  2015年

    DOI CiNii

  • 21pDC-8 CALETにおける原子核成分スペクトル観測性能

    佐藤 文佳, 鳥居 祥二, 斎藤 優, 仁井田 多絵, 浅岡 陽一, 笠原 克昌, 小澤 俊介, 赤池 陽水, CALETチーム

    日本物理学会講演概要集   70   401 - 401  2015年

    DOI CiNii

  • Status and performance of the CALorimetric Electron Telescope (CALET) on the international space station

    O. Adriani, Y. Akaike, Y. Asaoka, K. Asano, M. G. Bagliesi, G. Bigongiari, W. R. Binns, M. Bongi, J. H. Buckley, A. Cassese, G. Castellini, M. L. Cherry, G. Collazuol, K. Ebisawa, V. di Felice, H. Fuke, T. G. Guzik, T. Hamsa, N. Hasebe, M. Hareyama, K. Hibino, M. Ichimura, K. Ioka, M. H. Israel, A. Javaid, E. Kamioka, K. Kasahara, Y. Katayose, J. Kataoka, R. Kataoka, N. Kawanaka, H. Kitamura, T. Kotani, H. S. Krawczynski, J. F. Krizmanic, A. Kubota, S. Kuramata, T. Lomtadze, P. Maestro, L. Marcelli, P. S. Marrocchesi, J. W. Mitchell, S. Miyake, K. Mizutani, H. M. Motz, A. A. Moiseev, K. Mori, M. Mori, N. Mori, K. Munakata, H. Murakami, Y. E. Nakagawa, S. Nakahira, J. Nishimura, S. Okuno, J. F. Ormes, S. Ozawa, F. Palma, P. Papini, B. F. Rauch, S. Ricciarini, T. Sakamoto, M. Sasaki, M. Shibata, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, N. Tateyama, T. Terasawa, H. Tomida, S. Torii, Y. Tunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, T. Yuda

    Nuclear Physics B - Proceedings Supplements   256-257   225 - 232  2014年12月

    　概要を見る

    © 2014 Elsevier B.V. The CALorimetric Electron Telescope (CALET) space experiment, currently under development by Japan in collaboration with Italy and the United States, will measure the flux of cosmic-ray electrons (including positrons) to 20 TeV, gamma rays to 10 TeV and nuclei with Z=1 to 40 up to 1,000 TeV during a two-year mission on the International Space Station (ISS), extendable to five years. These measurements are essential to search for dark matter signatures, investigate the mechanism of cosmic-ray acceleration and propagation in the Galaxy and discover possible astrophysical sources of high-energy electrons nearby the Earth. The instrument consists of two layers of segmented plastic scintillators for the cosmic-ray charge identification (CHD), a 3 radiation length thick tungsten-scintillating fiber imaging calorimeter (IMC) and a 27 radiation length thick lead-tungstate calorimeter (TASC). CALET has sufficient depth, imaging capabilities and excellent energy resolution to allow for a clear separation between hadrons and electrons and between charged particles and gamma rays. The instrument will be launched to the ISS within 2014 Japanese Fiscal Year (by the end of March 2015) and installed on the Japanese Experiment Module-Exposed Facility (JEM-EF). In this paper, we will review the status and main science goals of the mission and describe the instrument configuration and performance.

    DOI

    Scopus

    10
    被引用数
    (Scopus)

  • CALETの運用及びデータ解析・管理システムの概要(宇宙科学情報解析論文誌 第三号)

    赤池 陽水, 浅岡 陽一, 上野 史郎, 田村 忠久, 寺澤 敏夫, 冨田 洋, 鳥居 祥二, 中川 友進, 仁井田 多絵

    宇宙航空研究開発機構研究開発報告   13   99 - 107  2014年03月

    　概要を見る

    CALorimetric Electron Telescope (CALET) は国際宇宙ステーションの「きぼう」に搭載予定の宇宙線観測装置で、 2014年から 5年間の観測を実施予定である。CALETの主検出器は、電子( 1 GeV . 20 TeV)、ガンマ線( 10 GeV. 10 TeV)の観測に最適化したカロリメータで、優れたエネルギー分解能と強力な粒子識別能を有し、宇宙線近傍加速源と暗黒物質候補の探索が主な目的である。観測性能については、これまでに気球実験や加速器実験で検証が行われており、シミュレーション計算や加速器実験結果から高い精度が確認されている。本論文では、これらの性能評価を基に CALETが取得するデータの解析手法について解説する。また運用中における CALETの地上システムや、データの取り扱いについてその概要を紹介する。

    CiNii

  • 28aTS-4 CALET地上運用システム : WCOCの役割と準備状況(28aTS 高エネルギー宇宙線,宇宙線・宇宙物理領域)

    浅岡 陽一, 鳥居 祥二, 小澤 俊介, 笠原 克昌, 神尾 泰樹, 下村 健太, 仁井田 多絵, 力石 和樹, 田村 忠久, 上野 史郎, 清水 雄輝, 冨田 洋, 赤池 陽水, CALETチーム

    日本物理学会講演概要集   69.1.1   123  2014年

    DOI CiNii

  • 19aSC-5 Waseda CALET Operations Center(WCOC)における軌道上データ処理システムの開発(19aSC 高エネルギー宇宙線(CALET,LHCf),宇宙線・宇宙物理領域)

    浅岡 陽一, 鳥居 祥二, 小澤 俊介, 笠原 克昌, 神尾 泰樹, 下村 健太, 仁井田 多絵, 力石 和樹, 田村 忠久, 上野 史郎, 清水 雄輝, 冨田 洋, 赤池 陽水, CALETチーム

    日本物理学会講演概要集   69.2.1   38  2014年

    DOI CiNii

  • 28aTS-5 ISS軌道上CALETテレメトリデータ模擬(28aTS 高エネルギー宇宙線,宇宙線・宇宙物理領域)

    下村 健太, 鳥居 祥二, 浅岡 陽一, 小澤 俊介, 笠原 克昌, 神尾 泰樹, 仁井田 多絵, 力石 和樹, 田村 忠久, 上野 史郎, 清水 雄輝, 冨田 洋, 赤池 陽水, CALETチーム

    日本物理学会講演概要集   69.1.1   123  2014年

    DOI CiNii

  • 19aSC-6 CALET軌道上模擬データを用いた観測データ予測(19aSC 高エネルギー宇宙線(CALET,LHCf),宇宙線・宇宙物理領域)

    力石 和樹, 鳥居 祥二, 神尾 泰樹, 下村 健太, 仁井田 多絵, 浅岡 陽一, 笠原 克昌, 小澤 俊介, 田村 忠久, 清水 雄輝, 赤池 陽水, CALETチーム

    日本物理学会講演概要集   69.2.1   38  2014年

    DOI CiNii

  • 19aSC-7 WCOCにおける軌道上データ管制システムの開発(19aSC 高エネルギー宇宙線(CALET,LHCf),宇宙線・宇宙物理領域)

    下村 健太, 鳥居 祥二, 神尾 泰樹, 仁井田 多絵, 力石 和樹, 浅岡 陽一, 笠原 克昌, 小澤 俊介, 田村 忠久, 清水 雄輝, 赤池 陽水, CALETチーム

    日本物理学会講演概要集   69.2.1   38  2014年

    DOI CiNii

  • 22pSP-8 CERN-SPS重粒子照射によるCALET電荷検出装置の性能テスト(高エネルギー宇宙線(CALET・BESS),宇宙線・宇宙物理領域)

    小澤 俊介, 赤池 陽水, 植山 良貴, 笠原 克昌, 金子 翔伍, 齋藤 優, 田村 忠久, 鳥居 祥二, 村田 彬, 仁井田 多絵, CALETチーム

    日本物理学会講演概要集   68.2.1   115  2013年

    DOI CiNii

  • The CALET structure and thermal model used for beam test at CERN

    Ueyama Yoshitaka, Torii Shoji, Kasahara Katsuaki, Ozawa Shunsuke, Niita Tae, Nakamura Masanori, Kaneko Shogo, Katahira Ryo, Murata Akira, Tamura Tadahisa, Katayose Yusaku, Akaike Yosui, Shimizu Yuki

    Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013   2013-October  2013年

    　概要を見る

    The Calorimetric Electron Telescope (CALET) is a new space experiment for astroparticle physics, which will carry out a five-year observation at the Japanese Experiment Module-Exposed Facility (JEM-EF) of the International Space Station (ISS). The experiment, currently under development by Japan in collaboration with Italy and the United States, will measure mainly the flux of cosmic-ray electrons (including positrons) to 20 TeV, gamma-rays to 10 TeV, and nuclei with Z=1 to 40 up to 1000 TeV. We have carried out a beam test of the CALET calorimeter at CERN-SPS by using the Beam-Test Model (BTM), which consisted of the Structure and Thermal Model (STM) and the Bread Board Model(BBM) of the front end circuits. The model consists of the same support structure as the CALET flight model and it includes the Imaging Calorimeter (IMC), the Total Absorption Calorimeter(TASC) and the Charge Detector(CHD). A part of the sensors; the scintillating fibers in the IMC, the PWO logs in the TASC, and the plastic scintillators paddles in the CHD, was adapted for the test. We will describe the model, and will report the basic performance obtained in the beam test.

  • 気球搭載型CALET プロトタイプ(bCALET-2)による電子・ガンマ線観測(大気球研究報告)

    仁井田 多絵, 鳥居 祥二, 小澤 俊介, 笠原 克昌, 村上 浩之, 赤池 陽水, 植山 良貴, 伊藤 大二郎, 苅部 樹彦, 近藤 慧之輔, 九反 万里恵, 田村 忠久, 吉田 健二, 片寄 祐作, 清水 雄輝, 福家 英之

    宇宙航空研究開発機構研究開発報告   11   17 - 46  2012年03月

    　概要を見る

    我々は,国際宇宙ステーション日本実験棟(きぼう)での高エネルギー宇宙線観測により,近傍加速源の発見や暗黒物質の探索を目指すCALorimetric Electron Telescope(CALET)の気球搭載型プロトタイプ観測装置(bCALET)を開発し,bCALET-1(2006 年)とbCALET-2(2009 年)の2 回にわたり観測実験を実施した.これらの観測は,CALET の先駆的観測として大気上層における電子・ガンマ線フラックスを求めることにより,観測装置の性能検証を行うことを目的としている.CALET の1/2 スケールモデルであるbCALET-2 は,入射粒子の飛跡を可視化するための解像型カロリメータ(IMaging Calorimeter : IMC)と,入射粒子のエネルギーを測定するための全吸収型カロリメータ(Total AbSorption Calorimeter : TASC)から構成され,1 - 100 GeV の領域で,電子・ガンマ線の識別とエネルギー測定が可能である.気球観測は2009 年8 月27 日,北海道のJAXA 大樹航空宇宙実験場で行われ,高度35 km における約2.5 時間の観測の結果,約12,000 例の宇宙線イベントを取得した.加速器実験やシミュレーション計算の結果を用いた,エネルギー較正,飛跡再構成,バックグラウンド除去などのデータ解析により,電子・ガンマ線それぞれについてエネルギースペクトルが求められている.この結果は,bCALET-1 やBETS(1998 年)などのこれまでの観測結果や計算に基づく予測値ともよく一致しており,今後のCALET の開発において大きな意義を持つ.

    CiNii

  • Performance of the CALET prototype: CERN beam test

    Mikihiko Karube, Shoji Torii, Katsuaki Kasahara, Shunsuke Ozawa, Yosui Akaike, Toshihide Aiba, Yoshitaka Ueyama, Masanori Nakamura, Keisuke Yoshida, Tadahisa Tamura, Shoji Okuno, Yusaku Katayose, Yuki Shimizu

    Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011   6   383 - 386  2011年

    　概要を見る

    We are developing the CALET mission to observe high energy cosmic rays at the Japanese Experiment Module/Exposed Facility (JEM/EF) on the International Space Station. The instrument will be flown in 2013, and will be used for 5 years. The primary scientific purpose of CALET is to search for nearby cosmic ray sources and dark matter. We carried out an accelerator beam test with high energy particles with the CALET prototype at the CERN-SPS. The purpose of this test was to assess the detector performance as well as to study the accuracy of the Monte Carlo simulation method. The prototype detector consists of an imaging calorimeter with 256 scintillating fibers and a total absorption calorimeter consisting of 16 PWO logs. The longitudinal structure is similar with the CALET instrument. We used positron and proton beams in the energy region from 6 to 200 GeV, and from 30 to 150 GeV, respectively. Comparing the experimental data with the simulation results, we have measured the energy deposition in each component, the energy resolution, the lateral shower spread and the e/p separation capability.

    DOI

    Scopus

    2
    被引用数
    (Scopus)

  • The CALET CHD for determination of nuclear charge

    Yuki Shimizu, Oscar Adriani, Yosui Akaike, Carlo Avanzini, Maria Grazia Bagliesi, Andrea Basti, Gabriele Bigongiari, Massimo Bongi, Guido Castellini, Daijiro Ito, Mikihiko Karube, Katsuaki Kasahara, Me Young Kim, Keinosuke Kondo, Temuriaz Lomtadze, Masanori Nakamura, Paolo Maestro, Pier Simone Marrocchesi, Fabio Morsani, Tae Niita, Sergio Bruno Ricciarini, Shoji Torii, Yoshitaka Ueyama

    Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011   6   391 - 394  2011年  [査読有り]

    　概要を見る

    Calorimetric Electron Telescope (CALET) will be a high energy cosmic ray observatory on the Japanese Experimental Module - Exposed Facility of the International Space Station. In addition to electrons and gamma-rays, CALET has an excellent detection capability of cosmic ray nuclei. In order to determine the atomic number of measured nuclei, the CHarge Detector (CHD) is placed on the top of the calorimeter. The CALET-CHD consists of two orthogonal layers of plastic scintillator charge-measuring modules. Each layer is segmented into 14 scintillator paddles (45 cm×3.2 cm×1 cm) for the reduction of back scattering effects. We evaluated the charge resolution of the plastic scintillators with heavy ion accelerators. In this presentation, we will report the design of the CALET-CHD and its nuclei identification capability as inferred from heavy ion beam tests.

    DOI

    Scopus

    1
    被引用数
    (Scopus)

  • The event trigger system for CALET

    Yoshitaka Ueyama, Shoji Torii, Katsuaki Kasahara, Hiroyuki Murakami, Shunsuke Ozawa, Yosui Akaike, Tae Niita, Masanori Nakamura, Keisuke Yoshida, Tadahisa Tamura, Shoji Okuno, Yusaku Katayose, Yuki Shimizu

    Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011   6   387 - 390  2011年  [査読有り]

    　概要を見る

    The CALorimetric Electron Telescope, CALET, is a mission to study high energy phenomena in the universe by observing high energy cosmic rays (electrons, gamma rays, and nuclei) on the International Space Station. The instrument consists of a segmented plastic scintillator charge-measuring module, an imaging calorimeter consisting of 8 scintillating fiber planes interleaved with tungsten plates of 3 radiation length, and a total absorption calorimeter consisting of orthogonal PWO logs of 27 radiation length. It is necessary to eliminate the background events, mostly low energy protons that prevent efficient observation of high energy cosmic rays. Therefore, CALET has an on-board trigger system to select events which are 1) high energy showers, 2) low energy showers and 3) non-interacting protons or heavy nuclei. These triggers are generated by a combination of the signals from the charge detector, the imaging calorimeter, and the top layer of PWO in the total absorption calorimeter. A CERN-SPS beam test of the CALET prototype detector was carried out by using muons, electrons, and hadrons. We introduce the CALET trigger system and present its performance verified during the beam test.

    DOI

    Scopus

  • Measurements of cosmic-ray electron and gamma-ray flux with balloon-borne CALET prototype

    T. Niita, S. Torii, K. Kasahara, T. Tamura, K. Yoshida, Y. Katayose, H. Murakami, S. Ozawa, Y. Shimizu, Y. Akaike, Y. Ueyama, D. Ito, M. Karube, K. Kondo, M. Kyutan

    Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011   6   21 - 24  2011年  [査読有り]

    　概要を見る

    We carried out the balloon experiments using CALET (CALorimetric Electron Telescope) prototype detectors in May 2006 (bCALET-1) and August 2009 (bCALET-2) for verification of both the detector performance and the capability of measuring the cosmic rays at higher atmosphere. The bCALET-2 instrument for observing the electrons and the gamma rays at energies in 1-100 GeV is composed of an imaging calorimeter consisting of 4096 scintillating fibers with a total of 3.6 radiation lengths of tungsten plates, and a total absorption calorimeter consisting of crossed 60 BGO logs with a total of 13.4 radiation lengths depth. The bCALET-2 was launched from the Taiki Aerospace Research Field, Japan Aerospace Exploration Agency, in Hokkaido, and flew successfully for 2.5 hours at a level altitude of 35 km. In this paper, we will present the spectra of electrons and gamma rays in the energy range of 1-100 GeV measured by bCALET-2, comparing with our previous observations, bCALET-1 and BETS. The detector performance is studied by comparing with the simulations, and the observed fluxes are found to be compatible with the expected.

    DOI

    Scopus

    2
    被引用数
    (Scopus)

  • Expected CALET telescope performance from monte carlo simulations

    Yosui Akaike, Katsuaki Kasahara, Shoji Torii, Shunsuke Ozawa, Yuki Shimizu, Mikihiko Karube, Keisuke Yoshida, Kenji Yoshida, Masakatsu Ichimura

    Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011   6   371 - 374  2011年  [査読有り]

    　概要を見る

    The CALorimetric Electron Telescope, CALET, is a versatile detector for exploring the high energy universe, planned to be placed on the Japanese Experiment Module Facility of the International Space Station, ISS. CALET is designed to perform direct measurements of electrons from 1 GeV to 20 TeV, gamma-rays from 10 GeV to 10 TeV, and protons and nuclei from several 10 GeV to 1000 TeV. The main detector consists of a Charge Detector (CHD), an Imaging Calorimeter (IMC), and a Total Absorption Calorimeter (TASC). The total thickness of the calorimeter is 30 X0 for electromagnetic particles or 1.3 λ for protons. We have been carrying out Monte Carlo simulations with EPICS to study the CALET performance. With its imaging and deep calorimeter, CALET provides excellent proton rejection, ∼ 105, and a high energy resolution, ∼2%, over 100 GeV for electromagnetic particles, which make possible the observation of electrons and gamma-rays into the TeV region. In this paper, we will present the expected performance in observing the different particle species, including the geometric factor, the trigger efficiency, the energy resolution and the particle identification power.

    DOI

    Scopus

    14
    被引用数
    (Scopus)

  • The balloon-bone CALET prototype detector (bCALET)

    Shunsuke Ozawa, Shoji Torii, Katsuaki Kasahara, Hiroyuki Murakami, Yosui Akaike, Yoshitaka Ueyama, Daijiro Ito, Motohiko Karube, Keinosuke Kondo, Tae Niita, Tadahisa Tamura, Yusaku Katayose, Kenji Yoshida, Yoshitaka Saito, Hideyuki Fuke, Jiro Kawada

    Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011   6   71 - 74  2011年  [査読有り]

    　概要を見る

    The CALET payload will be installed in the Japanese Experiment Module Exposed Facility (JEM-EF) of the International Space Station (ISS). We developed a balloon-borne payload to evaluate the performance of CALET by carrying out precursor flights for the electron and gamma-ray observations. The first flight of bCALET-1 (balloon-borne CALET prototype) was carried out in 2006, and the enhanced version, bCALET-2, was successfully flown in August 2009. The bCALET-2 is composed of IMaging Calorimeter (IMC) and Total AbSorption Calorimeter (TASC). The IMC has an area of 256 mm × 256 mm, and is consisted of 8 layers of scintillating fiber belts with a total 3.6 radiation lengths of tungsten plates interleaved within the fiber planes for imaging the pre-shower development. TASC is consisted of crossed BGO logs (25 mm × 25 mm × 300 mm in each) with a total of 13.4 radiation lengths depth, for measuring the total energy deposit of incoming shower particles. The geometry factor is nearly 320 cm2sr over 10 GeV. We succeeded the observation of the electron energy spectrum in 1 GeV ∼ several 10 GeV electron and the atmospheric gamma-rays in 1 GeV ∼ a few 10 GeV, which are consistent with previous observations by BETS. The results are compared with simulations for confirming the detector performance.

    DOI

    Scopus

    1
    被引用数
    (Scopus)

  • Scientific prospects of electron and gamma-ray observations with the CALET instrument on-board ISS

    Kenji Yoshida, Aya Kubota, Shoji Torii, Katsuaki Kasahara, Yosui Akaike, Tadahisa Tamura, Masaki Mori

    31st International Cosmic Ray Conference, ICRC 2009    2009年

    　概要を見る

    The CALorimetric Electron Telescope, CALET, is a new all-sky gamma-ray and electron observatory being developed for the Exposure Facility of Japanese Experiment Module (JEM-EF) on the International Space Station (ISS). The mission goal is to investigate high-energy universe by observing cosmic-ray electrons in 1 GeV - 20 TeV, gamma rays in 20 MeV - 10 TeV, and protons, heavier nuclei in several 10 GeV - 1 PeV. The main instrument consists of an imaging calorimeter of scintillating fibers, IMC, and a total absorption calorimeter of BGO, TASC. CALET has a unique capability to observe highenergy electrons and gamma rays with an energy resolution better than a few % above 100 GeV, an angular resolution of 0.1 deg above 100 GeV, a wide field of view of around 1.8 sr, and a hadron rejection power larger than 105. This capability enables us to search for nearby cosmic-ray sources, dark matter, and survey the variable gamma-ray sky.

  • Simulated performance of CALET on ISS orbit

    Yosui Akaike, Katsuaki Kasahara, Shoji Torii, Shunsuke Ozawa, Koichi Taira, Kenji Yoshida

    31st International Cosmic Ray Conference, ICRC 2009    2009年

    　概要を見る

    Calorimetric Electron Telescope, CALET, is being developed to be on board the Japanese Experiment Module Exposed Facility, JEM/EF, of the International Space Station, ISS. Major goals of the mission are to search for nearby cosmic ray sources and dark matter by carrying out a precise measurement of the electrons in 1 GeV - 20 TeV and the gamma-rays in 20 MeV - A few TeV. CALET will measure the protons and the nuclei up to 1000 TeV as well. The main detector is composed of Imaging Calorimeter, IMC, Total Absorption Calorimeter, TASC, Silicon Array, SIA, and Anti-Coincidence Detector, ACD, to detect various kinds of particles in very wide energy range. The total absorber thickness is 31 X0 for electromagnetic particles and 1.4 ̧ for protons. To get optimized CALET performance in observing each kind of particles, we have been carrying out Monte Carlo simulation. In this paper, we estimate the trigger rate at the ISS orbit by calculating the cosmic ray flux at an altitude of 400 km. The rate is 37 Hz for the shower trigger over 10 GeV, which is mainly adopted in the CALET mission. An expected performance of detector such as the geometrical factor, the energy resolution, the angular resolution and the electron/proton separation is also presented.

  • 22aSH-5 CALET開発報告32 : シミュレーション計算による原子核成分観測性能の評価(22aSH 高・超高エネルギー,宇宙線・宇宙物理領域)

    平 晃一, 笠原 克昌, 鳥居 祥二, 小澤 俊介, 有働 慈治, 赤池 陽水, 吉田 健二, CALETチーム

    日本物理学会講演概要集   63.2.1   86  2008年

    DOI CiNii

  • Balloon observation of electrons and gamma rays with CALET prototype

    Y. Shimizu, S. Torii, K. Kasahara, Y. Akaike, Y. Fukuta, K. Hidaka, K. Taira, T. Tamura, K. Yoshida, Y. Katayose, H. Murakami

    Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007   2 ( 1 ) 433 - 436  2007年

    　概要を見る

    We carried out a balloon observation of cosmic rays using a prototype of the CALET at the Sanriku Balloon Center of the Japan Aerospace Exploration Agency. The prototype detector consists of 1024 scintillating fibers for track imaging and 24 BGO scintillator logs for total absorption of showers. The observation was carried at an altiude between 35 and 37 km for about 3.5 hours. We measured electrons and-rays in the energy region between 1 to 100 GeV, and 20 MeV to 1 GeV, respectively. In addition to verification of the prototype system, we have obtained the electron flux which is useful to investigate solar modulation. Now we are planning a series of balloon experiments with larger-scale detectors and longer-duration flights, which includes one-month observation by a super-pressure balloon.

  • Expected performance of CALET

    K. Kasahara, S. Torii, Y. Shimizu, Y. Akaike, K. Taira, K. Yoshida, I. Watanabe

    Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007   3 ( 2 ) 1433 - 1436  2007年

    　概要を見る

    CALET is a detector planned to be on board ISS to investigate high energy universe by observing high energy gamma-rays, electrons and other cosmic ray. It is now in the phase A/B study period of the JAXA program. The performance of CALET was studied earlier[1] but the design structure (mainly its size) has been changed since that time. We have been performing new M.C simulations corresponding to the new structure to evaluate its basic performance. This is to report some of the new results.

▼全件表示

講演・口頭発表等

  • Direct Measurement of All-particle Spectrum up to the PeV region with CALET on the International Space Station

    Yosui Akaike

    ICRC2025 - The Astroparticle Physics Conference  

    発表年月： 2025年07月

    開催年月：
    2025年07月
    　
    　

  • Precise Measurement of the Electron plus Positron Spectrum with CALET on the International Space Station

    Yosui Akaike

    ICRC2025 - The Astroparticle Physics Conference  

    発表年月： 2025年07月

    開催年月：
    2025年07月
    　
    　

  • The Calorimetric Electron Telescope (CALET) on the International Space Station: Results from the Six Years on Orbit

    Yosui Akaike  [招待有り]

    44th COSPAR Scientific Assembly  

    発表年月： 2022年07月

    開催年月：
    2022年07月
    　
    　

  • Direct Measurements of Cosmic Rays with the Calorimetric Electron Telescope on the International Space Station

    Yosui Akaike  [招待有り]

    21st International Symposium on Very High Energy Cosmic Ray Interactions  

    発表年月： 2022年05月

    開催年月：
    2022年05月
    -
    2022年

  • Direct cosmic-ray measurements with CALET on the International Space Station

    Yosui Akaike  [招待有り]

    International Conference on High Energy Density Sciences  

    発表年月： 2021年04月

    開催年月：
    2021年04月
    　
    　

共同研究・競争的資金等の研究課題

  • TeV領域宇宙線電子の精密観測による近傍加速源と暗黒物質の探索

    日本学術振興会  科学研究費助成事業

    研究期間:

    2024年04月
    -
    2027年03月
     

    赤池 陽水

    　概要を見る

    本研究では、宇宙線各成分の高精度測定を通じて、銀河宇宙線の起源や加速・伝播機構の理解を目指している。観測には、国際宇宙ステーションに搭載された宇宙線観測機CALET (Calorimetric Electron Telescope)を用いている。CALETは、GeVからTeV以上の電子観測に最適化したカロリメータ型の検出器であり、高いエネルギー分解能と強力な粒子識別性能を備えており、2015年の運用開始以降、長期間に渡り安定した観測を継続し、豊富なデータを蓄積している。
    本年度は、重原子核である鉄の解析精度向上に取り組み、10 GeV/nから1 TeV/nのスペクトルを導出した。その結果、数100 GeV/n付近でスペクトルの傾きが変化する硬化の兆候を確認した。これは高エネルギー領域における電荷選別精度の向上により初めて明らかになった成果であり、陽子・ヘリウム・炭素などの軽元素で報告されてきた硬化と整合的である。さらに、鉄が星間物質と相互作用して生成されると考えられるsub-Fe元素(Z=21-25)のうち、代表的なTi(Z=22)とCr(Z=24)について、10-250 GeV/nのエネルギースペクトルおよびTi/Fe、Cr/Fe比のエネルギー依存性を導出した。これらの二次核/一次核比は宇宙線伝播モデルを検証する鍵となる情報であり、特にB/C比と比較した際、鉄の方が伝播距離が短いため、地球近傍の拡散係数評価において重要な意義を持つ。以上の成果は現在論文として投稿済みである。

  • 宇宙線原子核の直接観測による銀河宇宙線の加速・伝播機構の研究

    日本学術振興会  科学研究費助成事業

    研究期間:

    2021年04月
    -
    2024年03月
     

    赤池 陽水

    　概要を見る

    国際宇宙ステーションに搭載した宇宙線観測機CALETは、2015年10月から観測を開始し、現在まで6年以上の安定的な観測を継続している。検出器は大きな不具合なく観測初期とほぼ変わらない状態を維持しており、効率的な運用の元で高精度なデータを蓄積を継続している。本研究の目的は、銀河宇宙線の起源や加速・伝播機構の解明のため、CALETの観測データを基に宇宙線中の陽子から鉄に至る主要な原子核成分を精確に測定することである。
    本年度は、重い原子核の主成分である鉄のエネルギースペクトルを、10 GeV/nから2.0 TeV/nの広いエネルギー領域でスペクトルを求め、ベキは-2.60で一定であることを測定した。さらに、ニッケル成分についても8.8 GeV/nから240 GeV/nの領域で観測を行い、鉄と同様にスペクトルのベキ-2.51で一定であることが分かった。いずれも単一の検出器として、これまでで最も高統計なデータであり、またバックグラウンド混入の少ない高精度なデータである。また、鉄とニッケルのフラックス比は、エネルギーと共に一定であり、これらが類似の加速・伝播機構を示唆しているものと考えられる。この結果は、陽子や炭素、酸素といったより軽い原子核のスペクトルに一般的に見られているスペクトルの硬化が存在しないことを示しており、銀河宇宙線の加速・伝播機構のモデル検証に重要な情報を提供するものである。これらの成果は、それぞれPhysical Review Letters誌に掲載された。

  • 高エネルギー銀河宇宙線の直接観測による宇宙線の加速・伝播機構の研究

    日本学術振興会  科学研究費助成事業

    研究期間:

    2020年09月
    -
    2022年03月
     

    赤池 陽水

    　概要を見る

    本研究は、荷電粒子観測による初めての宇宙線加速源の同定と宇宙暗黒物質の間接探索を目的として、国際宇宙ステーションに搭載した宇宙線観測機CALETの観測データを基に10 TeV領域に至る精確な宇宙線電子のエネルギースペクトルの導出を目指すものである。CALETは2015年10月から観測を開始し、2021年末までに6年以上の安定的な長期間観測を継続している。宇宙線電子成分の精確な測定のためには、電子の1000倍以上存在する陽子との選別性能の向上と、仔細なエネルギー較正が不可欠である。本年度は、これまでに選別した3 TeV以上の電子候補の各イベントについて、シミュレーション計算を基にLikelihoodやBDTによる多変量解析から電子らしさを評価し、粒子選別性能の向上を図った。また6年間の観測量に基づく5 TeVまでのエネルギースペクトルを導出し、この成果を宇宙線国際会議にて発表した。
    並行して行なった原子核観測では重い原子核である鉄とニッケルのエネルギースペクトルを導出した。これらのエネルギースペクトルは、陽子や炭素、酸素などの軽原子核で見られる数100 GeV/n領域のスペクトル硬化の兆候は存在せず、単一のべきであることが分かった。また鉄のニッケルのスペクトル比は一定であり、類似した加速・伝播機構を示唆しているものと考えられる。これらは軽核のスペクトルと合わせて理論モデルの構築に重要な基礎データとなる。この成果はそれぞれPhysical Review Letters誌から発表した。

  • 宇宙線電子観測の高精度化による宇宙線起源の解明

    日本学術振興会  科学研究費助成事業

    研究期間:

    2015年04月
    -
    2016年03月
     

    赤池 陽水

    　概要を見る

    国際宇宙ステーションにおける宇宙線観測実験CALETは、宇宙線の起源や加速・伝播機構の解明を目的に、GeVからTeVの高エネルギー領域における宇宙線観測を実施している。CALETの検出器は平成27年8月に宇宙ステーション補給機「こうのとり」によって国際宇宙ステーションに搭載され10月から観測を開始した。所期の目的であるTeV領域の電子観測に成功し、高統計のエネルギースペクトルの導出に向けて長期間の観測を行っている。
    本研究では、精確なエネルギースペクトルの導出に向けて、CALETの取得データの詳細な解析を実施した。打ち上げ前に地上で取得した宇宙線ミューオンやテストパルス、及び宇宙ステーション搭載後に機上で収集した宇宙線のデータを基に、検出器全チャンネルの応答が打上前後で変化せず正常な応答を示していることを確認した。また長期間の定常観測に向けて、軌道上の観測環境に応じた観測条件の最適化を実施した。軌道上で取得したデータを基に検出器のエネルギー較正を実施するとともに、取得イベントのエネルギーや粒子種の再構成を実施し、CALETがTeV領域の電子成分のイベントを取得していることを示した。さらに陽子から鉄までの原子核、及びガンマ線が検出されていることを示した。これらの成果を基に、CALET実験は正常に初期運用を終了し、定常運用への移行を達成している。今後高統計・高精度なエネルギースペクトルの導出に向け、長期間の観測を継続すると共にデータ解析の高精度化を図る予定である。

  • 高エネルギー宇宙電子・ガンマ線観測による近傍加速源・暗黒物質の研究

    日本学術振興会  科学研究費助成事業

    研究期間:

    2012年04月
    -
    2015年03月
     

    赤池 陽水

    　概要を見る

    銀河宇宙線の起源や加速・伝播機構の解明に向けて、国際宇宙ステーションにおける宇宙線観測実験CALETの装置開発を進めている。本研究では、シミュレーション計算や加速器ビーム実験を通じて装置性能の検証を進めてきた。またフライトモデルの製作に伴い、地上における各種動作試験や較正実験を行った。
    (1) シミュレーション計算による観測性能評価と軌道上における検出器較正手法の開発 軌道上における検出器の出力較正のため、陽子やヘリウムを利用した較正手法を検討している。シミュレーション計算を基に、出力較正に利用可能な最小電離損失粒子の選別手法を開発し、またイベントレートを見積もることにより、軌道上において現実的な時間で較正可能であることを示した。
    (2) フライトモデルの地上較正試験 CALETのフライト品の完成に伴い、検出器の組上げ試験、システム試験、熱真空試験等を実施した。各過程において、テストパルスやペデスタルのノイズレベルの評価、宇宙線ミューオンを利用した動作確認等を行ってきた。最終的なエネルギー較正に必要となる信号応答の基礎データの取得についても、紫外線パルスレーザー光を利用して全チャンネルの較正試験を実施した。
    (3) CERN-SPSにおける重粒子ビーム実験 CALETのフライトモデルと同じ構造をもつ熱構造モデルを用いて、欧州原子核研究機構CERNのSPS加速器においてArの破砕核を利用した加速器実験を実施した。この実験では、初めてカロリメータによるシャワー粒子の出力応答を検証することができたため、後方散乱の影響を含む電荷測定性能、エネルギー測定性能の検証を行った。今後詳細な解析を進め、CALETに最適なハドロン相互作用モデルの検証も行う。

  • 宇宙における高エネルギー粒子の生成・加速機構の実験的研究

    日本学術振興会  科学研究費助成事業

    研究期間:

    2009年
    -
    2011年
     

    赤池 陽水

    　概要を見る

    本研究の目的は、高エネルギー宇宙線電子成分の観測により、近傍加速源や暗黒物質の探索を行うことである。このために、電子観測に最適な検出器を開発し、国際宇宙ステーション(International Space Station:ISS)における本格的な宇宙線観測計画(CALorimetric Electron Telescope:CALET)を進めている。高精度な電子観測を実現するためには、検出器に優れたエネルギー測定性能とバックグラウンドとなる陽子との強力な粒子識別性能が要求される。CALIETはこれらを実現するために厚いカロリメータ型の検出器を採用しており、これまでにシミュレーション計算を通じて、潜在的に高い観測能力を持つことを示している。本年度はこれらを実証するために、欧州原子核機構(CERN)におけるSPS加速器を用いたビーム試験を実施した。電子10-290GeV、陽子30-350GeVのビームをCALETのプロトタイプとなる検出器に照射し、シャワーの粒子数分布やエネルギー分解能、粒子識別において重要なパラメータとなるシャワーの横拡がりや遷移曲線について、電子、陽子の各粒子、各エネルギーにおける実験データの解析を進めている。これらの実験データは、CALETにおける開発要素の技術実証やISSにおける観測性能の実証に加えて、シミュレーション計算で再現することにより、CALETの解析手法の検証やシミュレーション計算自体の精度向上の点で大きな成果が得られている。また今回のビーム試験では、高統計の陽子イベントを取得しており、今後さらに詳細に解析を進めることで、シミュレーション計算において最も不定性の大きいハドロン相互作用モデルについて、CALETに最も適したモデル選別の検証も実施する予定である。

▼全件表示

Misc

  • ISS/CALETとArase衛星の結合事象期間中に観測されたREPとコーラスの反復期間【JST機械翻訳】|||

    ARAI Madoka, KATOH Yuto, KATAOKA Ryuho, TERAMOTO Mariko, KUMAMOTO Atsushi, TSUCHIYA Fuminori, KASABA Yasumasa, MIYOSHI Yoshizumi, KASAHARA Yoshiya, MATSUDA Shoya, SHINOHARA Iku, YAMAMOTO Kazuhiro, MATSUOKA Ayako, HORI Tomoaki, SHINBORI Atsuki, TORII Shoji, AKAIKE Yosui

    地球電磁気・地球惑星圏学会総会及び講演会(Web)   156th  2024年

    J-GLOBAL

  • 重力波観測O4におけるCALETの重力波電磁波対応天体の探査

    川久保雄太, CHERRY M.L., 赤池陽水, 小林兼好, 鳥居祥二, 森正樹, 坂本貴紀, 吉田篤正, CANNADY N.

    日本物理学会講演概要集(CD-ROM)   78 ( 2 )  2023年

    J-GLOBAL

  • CALETガンマ線データを用いた銀河暗黒物質由来ラインガンマ線の探索

    森正樹, 赤池陽水, 小林兼好, 鳥居祥二, CANNADY N., 川久保雄太, CHERRY M.L.

    日本物理学会講演概要集(CD-ROM)   77 ( 2 )  2022年

    J-GLOBAL

  • 宇宙線源分布の統計的揺らぎとCALET電子・陽電子宇宙線スペクトル

    浅野勝晃, 浅岡陽一, 赤池陽水, 川中宣太, 郡和範, MOTZ H. M., 寺澤敏夫

    日本天文学会年会講演予稿集   2022  2022年

    J-GLOBAL

  • 重イオンビーム照射によるCALET用電荷測定器の電荷分解性能及び耐放射線耐性評価

    小澤俊介, 鳥居祥二, 小谷太郎, 中川友進, 赤池陽水, 植山良貴, 近藤慧之輔, 仁井田多絵, 九反万里恵, 中村政則, 二宮翔太, 舟橋亮輔, 吉田圭佑, 渡邊仁規, 内堀幸夫, 北村尚, 清水雄輝, 片寄祐作

    NIRS-M (National Inst. of Radiological Sciences)   ( 251 )  2012年

    J-GLOBAL

  • 重イオンビーム照射によるCALET用シリコンピクセルアレイの電荷分解性能

    小澤俊介, 鳥居祥二, 清水雄輝, 赤池陽水, 相場俊英, 植山良貴, 伊藤大二郎, 苅部樹彦, 近藤慧之輔, 仁井田多絵, 内堀幸夫, 北村尚, 片寄祐作

    NIRS-M (National Inst. of Radiological Sciences)   ( 244 )  2011年

    J-GLOBAL

▼全件表示

 

特定課題制度（学内資金）

  • 国際宇宙ステーションにおける宇宙線高精度観測による宇宙線電子起源の解明

    2015年  

    　概要を見る

    本研究は、2015年8月に国際宇宙ステーションに搭載された宇宙線観測装置CALETによる観測データを基に、高エネルギー宇宙線の起源や加速・伝播機構の解明を目指している。本研究では打ち上げ前後の地上試験や初期運用時の収集データの解析を通じて、検出器が性能要求を満たす観測性能を有しており、打上げ前後で変わらない観測性能を示していることを確認した。また観測データの解析を実施し、所期の目的であるTeV領域の宇宙線電子成分の直接観測を達成した。本研究で得られた研究成果は、今後の詳細なデータ解析の基礎として重要であり、精緻なエネルギースペクトルの導出のため、高統計なデータ収集及びデータ解析を今後実施する予定である。