Direct measurements of cosmic rays with the calorimetric electron telescope on the international space station
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Published:2023-09-29
Issue:13
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Page:
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ISSN:2666-4003
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Container-title:SciPost Physics Proceedings
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language:
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Short-container-title:SciPost Phys. Proc.
Author:
Akaike Yosui12, Adriani O.34, Asano K.5, Asaoka Y.5, Berti E.34, Bigongiari G.67, Binns W. R.8, Bongi M.34, Brogi P.67, Bruno A.9, Buckley J. H.8, Cannady N.910, Castellini G.11, Checchia C.7, Cherry M. L.11, Collazuol G.1213, Ebisawa K.1, Ficklin A. W.11, Fuke H.1, Gonzi S.34, Guzik T. G.11, Hams T.10, Hibino K.14, Ichimura M.15, Ioka K.16, Ishizaki W.5, Israel M. H.8, Kasahara K.17, Kataoka J.2, Kataoka R.18, Katayose Y.19, Kato C.20, Kawanaka N.16, Kawakubo Y.11, Kobayashi K.12, Kohri K.21, Krawczynski H. S.8, Krizmanic J. F.9, Maestro P.67, Marrocchesi P. S.67, Messineo A. M.622, Mitchell J. W.9, Miyake S.23, Moiseev A. A.924, Mori M.25, Mori N.3, Motz H. M.2, Munakata K.20, Nakahira S.1, Nishimura J.1, de Nolfo G. A.9, Okuno S.14, Ormes J. F.26, Ozawa S.27, Pacini L.3411, Papini P.3, Rauch B. F.8, Ricciarini S. B.328, Sakai K.910, Sakamoto T.29, Sasaki M.924, Shimizu Y.14, Shiomi A.30, Spillantini P.4, Stolzi F.67, Sugita S.29, Sulaj A.67, Takita M.5, Tamura T.14, Terasawa T.5, Torii S.2, Tsunesada Y.31, Uchihori Y.32, Vannuccini E.3, Wefel J. P.11, Yamaoka K.33, Yanagita S.34, Yoshida A.29, Yoshida K.2917, Zober W. V.8
Affiliation:
1. Japan Aerospace Exploration Agency 2. Waseda University 3. INFN Sezione di Firenze 4. University of Florence 5. Institute for Cosmic Ray Research 6. INFN Sezione di Pisa 7. University of Siena 8. Washington University in St. Louis 9. National Aeronautics and Space Administration 10. University of Maryland, Baltimore County 11. Louisiana State University 12. National Institute for Nuclear Physics Padova Division 13. University of Padua 14. Kanagawa University 15. Hirosaki University 16. Kyoto University 17. Shibaura Institute of Technology 18. National Institute of Polar Research 19. Yokohama National University 20. Shinshu University 21. High Energy Accelerator Research Organization 22. University of Pisa 23. National Institute of Technology, Ibaraki College 24. University of Maryland, College Park 25. Ritsumeikan University 26. University of Denver 27. National Institute of Information and Communications Technology 28. Italian National Research Council 29. Aoyama Gakuin University 30. Nihon University 31. Osaka Metropolitan University 32. National Institutes for Quantum and Radiological Science and Technology 33. Nagoya University 34. Ibaraki University
Abstract
The CALorimetric Electron Telescope, CALET, has been measuring high-energy cosmic rays on the International Space Station since October 13, 2015. The scientific objectives addressed by the mission are to search for possible nearby sources of high-energy electrons and potential signatures of dark matter, and to investigate the details of galactic cosmic-ray acceleration and propagation. The calorimetric instrument, which is 30 radiation lengths or 1.3 proton interaction lengths thick with fine imaging capability, is optimized to measure cosmic-ray electrons by achieving large proton rejection and excellent energy resolution well into the TeV region. In addition, very wide dynamic range of energy measurement and individual charge identification capability enable us to measure proton and nuclei spectra from a few tens GeV to a PeV scale. Nearly 20 million cosmic-ray shower events over 10 GeV per month are triggered and the continuous observation has been kept without any major interruption since the start of operation. Using the data obtained over 6.5 years of operation, we will present a brief summary of the CALET observation including electron spectrum, and proton and nuclei spectra as well as the performance study on orbit with MC simulations.
Funder
Agenzia Spaziale Italiana Japan Society for the Promotion of Science Ministry of Education, Culture, Sports, Science and Technology National Aeronautics and Space Administration
Publisher
Stichting SciPost
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