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CERN Document Server Znaleziono 2,050 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 0.85 sekund. 
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Precision Measurement of the ($e^+ + e^−$) Flux in Primary Cosmic Rays from 0.5 GeV to 1 TeV with the Alpha Magnetic Spectrometer on the International Space Station / AMS Collaboration
We present a measurement of the cosmic ray ($e^+ + e^−$) flux in the range 0.5 GeV to 1 TeV based on the analysis of 10.6 million ($e^+ + e^−$) events collected by AMS. The statistics and the resolution of AMS provide a precision measurement of the flux. [...]
2014 - Published in : Phys. Rev. Lett. 113 (2014) 221102 APS Published version, local copy: PDF;
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High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–500 GeV with the Alpha Magnetic Spectrometer on the International Space Station / AMS Collaboration
A precision measurement by AMS of the positron fraction in primary cosmic rays in the energy range from 0.5 to 500 GeV based on 10.9 million positron and electron events is presented. This measurement extends the energy range of our previous observation and increases its precision. [...]
2014 - Published in : Phys. Rev. Lett. 113 (2014) 121101 APS Published version, local copy: PDF;
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Electron and Positron Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station / AMS Collaboration
Precision measurements by the Alpha Magnetic Spectrometer on the International Space Station of the primary cosmic-ray electron flux in the range 0.5 to 700 GeV and the positron flux in the range 0.5 to 500 GeV are presented. The electron flux and the positron flux each require a description beyond a single power-law spectrum. [...]
2014 - Published in : Phys. Rev. Lett. 113 (2014) 121102 APS Published version, local copy: PDF;
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Precision Measurement of the Boron to Carbon Flux Ratio in Cosmic Rays from 1.9 GV to 2.6 TV with the Alpha Magnetic Spectrometer on the International Space Station / Aguilar, M (Madrid, CIEMAT) ; Ali Cavasonza, L (JARA, Aachen) ; Alpat, B (INFN, Perugia) ; Ambrosi, G (INFN, Perugia) ; Arruda, L (LIP, Lisbon) ; Attig, N (Julich, NIC ; Unlisted, DE) ; Aupetit, S (LPSC, Grenoble) ; Azzarello, P (Geneva U.) ; Bachlechner, A (JARA, Aachen) ; Barao, F (LIP, Lisbon) et al. /AMS
Knowledge of the rigidity dependence of the boron to carbon flux ratio (B/C) is important in understanding the propagation of cosmic rays. The precise measurement of the B/C ratio from 1.9 GV to 2.6 TV, based on 2.3 million boron and 8.3 million carbon nuclei collected by AMS during the first 5 years of operation, is presented. [...]
2016 - 8 p. - Published in : Phys. Rev. Lett. 117 (2016) 231102 Fulltext: PDF;
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Antiproton Flux, Antiproton-to-Proton Flux Ratio, and Properties of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station / Aguilar, M (Madrid, CIEMAT) ; Ali Cavasonza, L (JARA, Aachen) ; Alpat, B (INFN, Perugia) ; Ambrosi, G (INFN, Perugia) ; Arruda, L (LIP, Lisbon) ; Attig, N (Julich, NIC ; Unlisted, DE) ; Aupetit, S (LPSC, Grenoble) ; Azzarello, P (Geneva U.) ; Bachlechner, A (JARA, Aachen) ; Barao, F (LIP, Lisbon) et al. /AMS
A precision measurement by AMS of the antiproton flux and the antiproton-to-proton flux ratio in primary cosmic rays in the absolute rigidity range from 1 to 450 GV is presented based on 3.49×105 antiproton events and 2.42×109 proton events. The fluxes and flux ratios of charged elementary particles in cosmic rays are also presented. [...]
2016 - 10 p. - Published in : Phys. Rev. Lett. 117 (2016) 091103 Fulltext: PDF;
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Precision Measurement of the Helium Flux in Primary Cosmic Rays of Rigidities 1.9 GV to 3 TV with the Alpha Magnetic Spectrometer on the International Space Station / AMS Collaboration
Knowledge of the precise rigidity dependence of the helium flux is important in understanding the origin, acceleration, and propagation of cosmic rays. A precise measurement of the helium flux in primary cosmic rays with rigidity (momentum/charge) from 1.9 GV to 3 TV based on 50 million events is presented and compared to the proton flux. [...]
2015 - 9 p. - Published in : Phys. Rev. Lett. 115 (2015) 211101 APS Open Access article: PDF;
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7.
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Properties of Neon, Magnesium, and Silicon Primary Cosmic Rays Results from the Alpha Magnetic Spectrometer / AMS Collaboration
We report the observation of new properties of primary cosmic rays, neon (Ne), magnesium (Mg), and silicon (Si), measured in the rigidity range 2.15 GV to 3.0 TV with $1.8×10^6$ Ne, $2.2×10^6$ Mg, and $1.6×10^6$ Si nuclei collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. The Ne and Mg spectra have identical rigidity dependence above 3.65 GV. [...]
2020 - 8 p. - Published in : Phys. Rev. Lett. 124 (2020) 211102 Fulltext from Publisher: PDF;
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8.
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Properties of Iron Primary Cosmic Rays: Results from the Alpha Magnetic Spectrometer / AMS Collaboration
We report the observation of new properties of primary iron (Fe) cosmic rays in the rigidity range 2.65 GV to 3.0 TV with 0.62×10$^6$ iron nuclei collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. Above 80.5 GV the rigidity dependence of the cosmic ray Fe flux is identical to the rigidity dependence of the primary cosmic ray He, C, and O fluxes, with the Fe/O flux ratio being constant at 0.155±0.006. [...]
2021 - 8 p. - Published in : Phys. Rev. Lett. 126 (2021) 041104 Fulltext: PDF;
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Properties of Heavy Secondary Fluorine Cosmic Rays: Results from the Alpha Magnetic Spectrometer / AMS Collaboration
Precise knowledge of the charge and rigidity dependence of the secondary cosmic ray fluxes and the secondary-to-primary flux ratios is essential in the understanding of cosmic ray propagation. We report the properties of heavy secondary cosmic ray fluorine F in the rigidity $R$ range 2.15 GV to 2.9 TV based on 0.29 million events collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. [...]
2021 - 8 p. - Published in : Phys. Rev. Lett. 126 (2021) 081102 Fulltext: PDF;
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The Alpha Magnetic Spectrometer (AMS) on the international space station: Part II — Results from the first seven years / AMS Collaboration
The Alpha Magnetic Spectrometer (AMS) is a precision particle physics detector on the International Space Station (ISS) conducting a unique, long-duration mission of fundamental physics research in space. The physics objectives include the precise studies of the origin of dark matter, antimatter, and cosmic rays as well as the exploration of new phenomena. [...]
2021 - 116 p. - Published in : Phys. Rep. 894 (2021) 1-116 Fulltext: PDF;
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