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      Measurement of the cosmic-ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite

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          Abstract

          The precise measurement of the spectrum of protons, the most abundant component of the cosmic radiation, is necessary to understand the source and acceleration of cosmic rays in the Milky Way. This work reports the measurement of the cosmic ray proton fluxes with kinetic energies from 40 GeV to 100 TeV, with two and a half years of data recorded by the DArk Matter Particle Explorer (DAMPE). This is the first time an experiment directly measures the cosmic ray protons up to ~100 TeV with a high statistics. The measured spectrum confirms the spectral hardening found by previous experiments and reveals a softening at ~13.6 TeV, with the spectral index changing from ~2.60 to ~2.85. Our result suggests the existence of a new spectral feature of cosmic rays at energies lower than the so-called knee, and sheds new light on the origin of Galactic cosmic rays.

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          A multidimensional unfolding method based on Bayes' theorem

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            DISCREPANT HARDENING OBSERVED IN COSMIC-RAY ELEMENTAL SPECTRA

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              • Article: not found

              Design of a high dynamic range photomultiplier base board for the BGO ECAL of DAMPE

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                Author and article information

                Journal
                27 September 2019
                2019-09-30
                Article
                10.1126/sciadv.aax3793
                1909.12860
                79982249-e2a0-4c38-b47b-2ab33d01c2e0

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

                History
                Custom metadata
                Science Advances, Vol. 5, no. 9, eaax3793 (2019)
                37 pages, 5 figures, published in Science Advances
                astro-ph.HE

                High energy astrophysical phenomena
                High energy astrophysical phenomena

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