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Direct Measurements of Cosmic Rays with the Calorimetric Electron Telescope on the International Space Station
by Y. Akaike, O. Adriani, 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 and W. V. Zober
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Submission summary
| Authors (as registered SciPost users): | Yosui Akaike |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202209_00020v1 (pdf) |
| Date submitted: | 2022-09-12 03:54 |
| Submitted by: | Akaike, Yosui |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 21st International Symposium on Very High Energy Cosmic Ray Interactions (ISVHECRI2022) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
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 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.
Current status:
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2022-10-3 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202209_00020v1, delivered 2022-10-03, doi: 10.21468/SciPost.Report.5824
Strengths
The paper gives a compact and concise summary of recent results from the CALET instrument on the ISS. Cosmic-ray energy spectra for electrons, protons, and several heavier nuclei are presented in the energy range of about 10 to 1000 GeV.
Weaknesses
No real weaknesses have been found.
Report
The paper summarizes recent results which have been published in international, high-profile journals. The material has already been refereed, no further comments.
The paper is a good summary of the talk presented at the conference. Thus, acceptance and publication is recommended.
Requested changes
Maybe in the abstract one could mention the depth of the calorimeter in hadronic interaction lengths. Most of the data presented are nuclei, thus specifying the depth in radiation lengths is of limited use.