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CERN Document Server Sök i 368 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 1.30 sekunder. 
1.
Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer / AMS Collaboration
Precision measurements by the Alpha Magnetic Spectrometer (AMS) on the International Space Station of the deuteron (D) flux are presented. The measurements are based on 21×106 D nuclei in the rigidity range from 1.9 to 21 GV collected from May 2011 to April 2021. [...]
2024 - 8 p. - Published in : Phys. Rev. Lett. 132 (2024) 261001 Fulltext: PDF;
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2.
First Result from the Alpha Magnetic Spectrometer on the International Space Station: Precision Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–350 GeV / AMS Collaboration
A precision measurement by the Alpha Magnetic Spectrometer on the International Space Station of the positron fraction in primary cosmic rays in the energy range from 0.5 to 350 GeV based on 6.8×106 positron and electron events is presented. The very accurate data show that the positron fraction is steadily increasing from 10 to ∼250  GeV, but, from 20 to 250 GeV, the slope decreases by an order of magnitude. [...]
2013 - 10 p. - Published in : Phys. Rev. Lett. 110 (2013) 141102 External links: Interactions.org article; Symmetry Magazine article; Press Release
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3.
Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays / AMS Collaboration
We present the precision measurements of 11 years of daily cosmic positron fluxes in the rigidity range from 1.00 to 41.9 GV based on 3.4×106 positrons collected with the Alpha Magnetic Spectrometer (AMS) aboard the International Space Station. The positron fluxes show distinctly different time variations from the electron fluxes at short and long timescales. [...]
2023 - 10 p. - Published in : Phys. Rev. Lett. 131 (2023) 151002 Fulltext: PDF;
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4.
Properties of Cosmic-Ray Sulfur and Determination of the Composition of Primary Cosmic-Ray Carbon, Neon, Magnesium, and Sulfur: Ten-Year Results from the Alpha Magnetic Spectrometer / AMS Collaboration
We report the properties of primary cosmic-ray sulfur (S) in the rigidity range 2.15 GV to 3.0 TV based on 0.38×106 sulfur nuclei collected by the Alpha Magnetic Spectrometer experiment (AMS). We observed that above 90 GV the rigidity dependence of the S flux is identical to the rigidity dependence of Ne-Mg-Si fluxes, which is different from the rigidity dependence of the He-C-O-Fe fluxes. [...]
2023 - 9 p. - Published in : Phys. Rev. Lett. 130 (2023) 211002 Fulltext: PDF;
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5.
Temporal Structures in Electron Spectra and Charge Sign Effects in Galactic Cosmic Rays / AMS Collaboration
We present the precision measurements of 11 years of daily cosmic electron fluxes in the rigidity interval from 1.00 to 41.9 GV based on 2.0×108 electrons collected with the Alpha Magnetic Spectrometer (AMS) aboard the International Space Station. The electron fluxes exhibit variations on multiple timescales. [...]
2023 - 11 p. - Published in : Phys. Rev. Lett. 130 (2023) 161001 Fulltext: PDF;
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6.
Anisotropy of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station / Casaus, Jorge (Madrid, CIEMAT) ; Maña, Carlos (Madrid, CIEMAT) ; Molero, Miguel (Madrid, CIEMAT) ; Velasco, Miguel Angel (Madrid, CIEMAT) ; Gebauer, Iris (KIT, Karlsruhe) ; Graziani, Maura (KIT, Karlsruhe) ; Zeissler, Stefan (KIT, Karlsruhe) ; La Vacca, Giuseppe (INFN, Milan Bicocca ; Milan Bicocca U.) ; Gervasi, Massimo (INFN, Milan Bicocca ; Milan Bicocca U.) ; Rancoita, Pier Giorgio (INFN, Milan Bicocca ; Milan Bicocca U.) /AMS Collaboration
A measurement of the dipole anisotropy in the arrival directions of galactic cosmic positrons, electrons and protons has been performed with the Alpha Magnetic Spectrometer (AMS) onboard the International Space Station (ISS) using the first 6 years of data. Thanks to its wide field of view and to the inclination of the ISS orbit, AMS provides nearly full sky coverage in galactic coordinates, which allows to determine the three independent dipole components for each cosmic ray species. [...]
SISSA, 2018 - 4 p. - Published in : PoS ICHEP2018 (2019) 370 Fulltext: PDF;
In : XXXIX International Conference on High Energy Physics, Seoul, Korea, 4 - 11 Jul 2018, pp.370
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7.
Properties of Daily Helium Fluxes / AMS Collaboration
We present the precision measurement of 2824 daily helium fluxes in cosmic rays from May 20, 2011 to October 29, 2019 in the rigidity interval from 1.71 to 100 GV based on 7.6×108 helium nuclei collected with the Alpha Magnetic Spectrometer (AMS) aboard the International Space Station. The helium flux and the helium to proton flux ratio exhibit variations on multiple timescales. [...]
2022 - 10 p. - Published in : Phys. Rev. Lett. 128 (2022) 231102 Fulltext: PDF;
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8.
Anisotropy of Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the ISS / Gebauer, Iris (KIT, Karlsruhe, IPE) ; Graziani, M (KIT, Karlsruhe, IPE) ; Casaus, J (Madrid, CIEMAT) ; Molero, M (Madrid, CIEMAT) ; Mana, C (Madrid, CIEMAT) ; Velasco, M A (Madrid, CIEMAT) ; Gervasi, M (INFN, Milan Bicocca ; Milan Bicocca U.) ; Rancoita, P G (INFN, Milan Bicocca ; Milan Bicocca U.) ; La Vacca, G (INFN, Milan Bicocca ; Milan Bicocca U.) /AMS Collaboration
An analysis of anisotropies in the arrival directions of galactic electrons and positrons, as well as protons, Helium, Carbon and Oxygen has been performed with the Alpha Magnetic Spectrometer on the International Space Station using the first 6.5 years (electrons and positrons) and the first 7.5 years (protons, Helium, Carbon, Oxygen) of data taking. Results on a dipole signal in Galactic coordinates are reported.The arrival directions of all studied cosmic ray species are consistent with isotropy. [...]
2020 - 8 p. - Published in : PoS ICRC2019 (2020) 150 Fulltext: PDF;
In : 36th International Cosmic Ray Conference, Madison, WI, USA, 24 Jul - 1 Aug 2019, pp.150
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9.
Periodicities in the Daily Proton Fluxes from 2011 to 2019 Measured by the Alpha Magnetic Spectrometer on the International Space Station from 1 to 100 GV / AMS Collaboration
We present the precision measurement of the daily proton fluxes in cosmic rays from May 20, 2011 to October 29, 2019 (a total of 2824 days or 114 Bartels rotations) in the rigidity interval from 1 to 100 GV based on 5.5×109 protons collected with the Alpha Magnetic Spectrometer aboard the International Space Station. The proton fluxes exhibit variations on multiple timescales. [...]
2021 - 8 p. - Published in : Phys. Rev. Lett. 127 (2021) 271102 Fulltext: PDF;
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10.
Properties of a New Group of Cosmic Nuclei: Results from the Alpha Magnetic Spectrometer on Sodium, Aluminum, and Nitrogen / AMS Collaboration
We report the properties of sodium (Na) and aluminum (Al) cosmic rays in the rigidity range 2.15 GV to 3.0 TV based on 0.46 million sodium and 0.51 million aluminum nuclei collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. We found that Na and Al, together with nitrogen (N), belong to a distinct cosmic ray group. [...]
2021 - 9 p. - Published in : Phys. Rev. Lett. 127 (2021) 021101 Fulltext: PDF;
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