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- Title
CALET Observations during the First 5 Years on the ISS.
- Authors
Marrocchesi, P. S.; Adriani, O.; Akaike, Y.; Asaoka, Y.; Berti, E.; Bigongiari, G.; Bongi, M.; Brogi, P.; Bruno, A.; Cannady, N.; Checchia, C.; Cherry, M. L.; Collazuol, G.; Ficklin, A. W.; Guzik, T. G.; Ichimura, M.; Israel, M. H.; Kasahara, K.; Kawakubo, Y.; Krizmanic, J. F.
- Abstract
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 electron/proton discrimination. Two independent sub-systems identify the charge of the incident particle from proton to iron and above ( 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.
- Subjects
HEAVY nuclei; TRANSIENTS (Dynamics); GAMMA rays; COSMIC rays; SPACE stations; POSITRONS; GRAVITATIONAL waves; IRON powder
- Publication
Physics of Atomic Nuclei, 2021, Vol 84, Issue 6, p985
- ISSN
1063-7788
- Publication type
Article
- DOI
10.1134/S1063778821130214