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

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dc.contributor.authorAdriani, Oscar
dc.contributor.authorAkaike, Yosui
dc.contributor.authorAsano, Katsuaki
dc.contributor.authorAaoka, Yoichi
dc.contributor.authorBerti, Eugenio
dc.contributor.authorBigongiari, Gabriele
dc.contributor.authorBinns, Walter Robert
dc.contributor.authorBongi, Massimo
dc.contributor.authorBrogi, Paolo
dc.contributor.authorBruno, Alessandro
dc.contributor.authorCannady, Nicholas
dc.contributor.authorCastellini, Guide
dc.contributor.authorChecchia, Caterina
dc.contributor.authorCherry, Walter Robert
dc.contributor.authorCollazuol, Gianmaria
dc.contributor.authorde Nolfo, Georgia A.
dc.contributor.authorEbisawa, Ken
dc.contributor.authorFicklin, Anthony W.
dc.contributor.authorFuke, Hideyuki
dc.contributor.authorGonzi, Sandro
dc.contributor.authorGuzik, T. Gregory
dc.contributor.authorHams, Thomas
dc.contributor.authorHibino, Kinya
dc.contributor.authorIchimura, Masakatsu
dc.contributor.authorIoka, Kunihito
dc.contributor.authorIshizaki, Wataru
dc.contributor.authorIsrael, Martin H.
dc.contributor.authorKasahara, Katsumasa
dc.contributor.authorKataoka, Jun
dc.contributor.authorKataoka, Ryuho
dc.contributor.authorKatayose, Yusaku
dc.contributor.authorKato, Chihiro
dc.contributor.authorKawanaka, Norita
dc.contributor.authorKawakubo, Yuta
dc.contributor.authorKobayashi, Kenko
dc.contributor.authorKohri, Kazunori
dc.contributor.authorKrawczynski, Henric S.
dc.contributor.authorKrizmanic, John
dc.contributor.authorMaestro, Paolo
dc.contributor.authorMarrocchesi, Pier Simone
dc.contributor.authorMessineo, Alberto Maria
dc.contributor.authorMitchell, Jason W.
dc.contributor.authorMiyake, Shoko
dc.contributor.authorMoiseev, Alexander
dc.contributor.authorMori, Masaki
dc.contributor.authorMori, Nicola
dc.contributor.authorMotz, Holger Martin
dc.contributor.authorMunakata, Kazuoki
dc.contributor.authorNakahira, Satoshi
dc.contributor.authorNishimura, Jun
dc.contributor.authorOkuno, Shoji
dc.contributor.authorOrmes, Jonathan
dc.contributor.authorOzawa, Shunsuke
dc.contributor.authorPacini, Lorenzo
dc.contributor.authorPacini, Paolo
dc.contributor.authorRauch, Brian Flint
dc.contributor.authorRicciarini, Ricciarini
dc.contributor.authorSakai, Kazuhiro
dc.contributor.authorSakamoto, Takanori
dc.contributor.authorSasaki, Makoto
dc.contributor.authorShimizu, Yuki
dc.contributor.authorShiomi, Atsushi
dc.contributor.authorSpillantini, Piero
dc.contributor.authorStolzi, Francesco
dc.contributor.authorSugita, Satoshi
dc.contributor.authorSulaj, Arta
dc.contributor.authorTakita, Masato
dc.contributor.authorTamura, Tadahisa
dc.contributor.authorTerasawa, Toshio
dc.contributor.authorTorii, Shoji
dc.contributor.authorTsunesada, Yoshiki
dc.contributor.authorUchihori, Yukio
dc.contributor.authorVannuccini, Elena
dc.contributor.authorWefel, John P.
dc.contributor.authorYamaoka, Kazutaka
dc.contributor.authorYanagita, Shohei
dc.contributor.authorYoshida, Atsumasa
dc.contributor.authorYoshida, Kenji
dc.contributor.authorZober, Wolfgang V.
dc.date.accessioned2024-09-24T09:00:18Z
dc.date.available2024-09-24T09:00:18Z
dc.date.issued2023-07-25
dc.description38th International Cosmic Ray Conference (ICRC2023), 26 July - 3 August, 2023, Nagoya, Japan
dc.description.abstractThe CALorimetric Electron Telescope (CALET) is a space-based calorimetric instrument, designed to carry out precision measurements of high energy cosmic rays. Installed on the Japanese Experiment Module - Exposed Facility on the ISS, it is collecting data with excellent performance and no significant interruptions since October 2015. We present the results of a direct measurement of the energy spectrum of cosmic-ray helium, based on about 6.5 years of collected data. It shows significant deviations from a single power law with a progressive hardening around a few hundred GeV followed by a softening in the multi-TeV region. A measurement of the proton to helium flux ratio is also presented. Thanks to the recent update of the CALET proton flux with higher statistics, the p/He ratio is measured with high precision, extending the energy reach of previous measurements with magnetic spectrometers by more than one order of magnitude.
dc.description.sponsorshipWe gratefully acknowledge JAXA’s contributions to the development of CALET and to the operations onboard the International Space Station. The CALET effort in Italy is supported by ASI under Agreement No. 2013-018-R.0 and its amendments. The CALET effort in the United States is supported by NASA through Grants No. 80NSSC20K0397, No. 80NSSC20K0399, and No. NNH18ZDA001N-APRA18-0004. This work is supported in part by JSPS Grant-in-Aid for Scientific Research (S) Grant No. 19H05608 in Japan.
dc.description.urihttps://pos.sissa.it/444/054/
dc.format.extent9 pages
dc.genreconference papers and proceedings
dc.identifierdoi:10.13016/m2vvtw-e4mm
dc.identifier.citationAdriani, Oscar, Yosui Akaike, Katsuaki Asano, Yoichi Aaoka, Eugenio Berti, Gabriele Bigongiari, Walter Robert Binns, et al. “Helium Flux and Its Ratio to Proton Flux in Cosmic Rays Measured with CALET on the International Space Station.” In Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023), 444:054. SISSA Medialab, 2023. https://doi.org/10.22323/1.444.0054.
dc.identifier.urihttps://doi.org/10.22323/1.444.0054
dc.identifier.urihttp://hdl.handle.net/11603/36420
dc.language.isoen_US
dc.publisherProceedings of Science
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rightsPublic Domain
dc.rights.urihttps://creativecommons.org/publicdomain/mark/1.0/
dc.titleHelium flux and its ratio to proton flux in cosmic rays measured with CALET on the International Space Station
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0003-2916-6955
dcterms.creatorhttps://orcid.org/0000-0002-9247-3010

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