Precise Measurement of the Cosmic-Ray Electron and Positron Spectrum with CALET on the International Space Station

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dc.contributor.authorTorii, Shoji
dc.contributor.authorAkaike, Yosui
dc.contributor.authorCannady, Nicholas
dc.contributor.authorHams, Thomas
dc.contributor.authorKrizmanic, John F.
dc.contributor.authorSakai, Kenichi
dc.contributor.authorCALET Collaboration
dc.contributor.authoret al
dc.date.accessioned2022-08-10T18:18:07Z
dc.date.available2022-08-10T18:18:07Z
dc.date.issued2022-03-18
dc.description37th International Cosmic Ray Conference (ICRC 2021) July 12th – 23rd, 2021 Online – Berlin, Germanyen_US
dc.descriptionCALET Collaboration Authors: 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, and W. V. Zober
dc.description.abstractPrimary objectives of the CALET (CALorimetric Electron Telescope) mission are to search for possible nearby cosmic-ray sources and dark matter signatures with the precise measurement of the electron and positron (all-electron) spectrum. The instrument, consisting of a charge detector, an imaging calorimeter and a total absorption calorimeter, is optimized to measure the all-electron spectrum well into the TeV region with a thick calorimeter of 30 radiation length with fine shower imaging capability. Due to the excellent energy resolution (a few % above 10 GeV) and the outstanding e/p separation (~10^5), CALET achieves optimal performance for a detailed search for structures in the energy spectrum. CALET has been accumulating scientific data for more than five years without any major interruption, and the statistics of observed electron events has increased more than double since the latest publication in 2018. In this paper we will present precise measurements of the all-electron spectrum up to several TeV, as obtained with the high statistics data, and we will briefly discuss about its interpretation.en_US
dc.description.sponsorshipWe gratefully acknowledge JAXA’s contributions to the development of CALET and to the operations onboard the International Space Station. We also wish to express our sincere gratitude to ASI and NASA for their support of the CALET project. This work was supported in part by a JSPS Grant-in-Aid for Scientific Research (S)(No. 19H05608) and (C) 21K03592.en_US
dc.description.urihttps://pos.sissa.it/395/105/en_US
dc.format.extent9 pagesen_US
dc.genreconference papers and proceedingsen_US
dc.identifierdoi:10.13016/m2cwfo-hsfw
dc.identifier.citation“Precise Measurement of the Cosmic-Ray Electron and Positron Spectrum with CALET on the International Space Station,” S. Torii and Y. Akaike for the CALET Collaboration, Proceedings of Science: 37th International Cosmic Ray Conference , (Berlin, Germany), 105 (2021). https://doi.org/10.22323/1.395.0105en_US
dc.identifier.urihttps://doi.org/10.22323/1.395.0105
dc.identifier.urihttp://hdl.handle.net/11603/25337
dc.language.isoen_USen_US
dc.publisherProceedings of Scienceen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology
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.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titlePrecise Measurement of the Cosmic-Ray Electron and Positron Spectrum with CALET on the International Space Stationen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0003-2916-6955en_US

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