Our Latest Publication

Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays

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 $3.4 \times 10^6$ 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. A hysteresis between the electron fluxes and the positron fluxes is observed with a significance greater than 5σat rigidities below 8.5 GV. On the contrary, the positron fluxes and the proton fluxes show similar time variation. Remarkably, we found that positron fluxes are modulated more than proton fluxes with a significance greater than 5σ for rigidities below 7 GV. These continuous daily positron fluxes, together with AMS daily electron, proton, and helium fluxes over an 11-year solar cycle, provide unique input to the understanding of both the charge-sign and mass dependencies of cosmic rays in the heliosphere.

Phys. Rev. Lett. 131, 151002
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AMS-02 Publications

Total citations to-date: 7, 388
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Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays
Phys. Rev. Lett. 131, 151002 (2023), Citations: 1, View supplemental material and data
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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
Phys. Rev. Lett. 130, 211002 (2023), Citations: 8, View supplemental material and data
Published on Editors' Suggestion Featured in Physics Physics Viewpoint
Temporal Structures in Electron Spectra and Charge Sign Effects in Galactic Cosmic Rays
Phys. Rev. Lett. 130, 161001 (2023), Citations: 10, View supplemental material and data
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Properties of Daily Helium Fluxes
Phys. Rev. Lett. 128, 231102 (2022), Citations: 22, View supplemental material and data
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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
Phys. Rev. Lett. 127, 271102 (2021), Citations: 37, View supplemental material and data
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Properties of a New Group of Cosmic Nuclei: Results from the Alpha Magnetic Spectrometer on Sodium, Aluminum, and Nitrogen
Phys. Rev. Lett. 127, 021101 (2021), Citations: 27, View supplemental material and data
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Properties of Heavy Secondary Fluorine Cosmic Rays: Results from the Alpha Magnetic Spectrometer
Phys. Rev. Lett. 126, 081102 (2021), Citations: 41, View supplemental material and data
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The Alpha Magnetic Spectrometer (AMS) on the International Space Station: Part II - Results from the First Seven Years
Phys. Rep. 894, 1 (2021), Citations: 269, View supplemental material and data
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Properties of Iron Primary Cosmic Rays: Results from the Alpha Magnetic Spectrometer
Phys. Rev. Lett. 126, 041104 (2021), Citations: 86, View supplemental material and data
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Properties of Neon, Magnesium, and Silicon Primary Cosmic Rays Results from the Alpha Magnetic Spectrometer
Phys. Rev. Lett. 124, 211102 (2020), Citations: 97, View supplemental material and data
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Properties of Cosmic Helium Isotopes Measured by the Alpha Magnetic Spectrometer
Phys. Rev. Lett. 123, 181102 (2019), Citations: 57, View supplemental material and data
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Towards Understanding the Origin of Cosmic-Ray Electrons
Phys. Rev. Lett. 122, 101101 (2019), Citations: 166, View supplemental material and data
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Towards Understanding the Origin of Cosmic-Ray Positrons
Phys. Rev. Lett. 122, 041102 (2019), Citations: 284, View supplemental material and data
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Precision Measurement of Cosmic-Ray Nitrogen and its Primary and Secondary Components with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 121, 051103 (2018), Citations: 91, View supplemental material and data
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Observation of Complex Time Structures in the Cosmic-Ray Electron and Positron Fluxes with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 121, 051102 (2018), Citations: 87, View supplemental material and data
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Observation of Fine Time Structures in the Cosmic Proton and Helium Fluxes with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 121, 051101 (2018), Citations: 111, View supplemental material and data
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Observation of New Properties of Secondary Cosmic Rays Lithium, Beryllium, and Boron by the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 120, 021101 (2018), Citations: 266, View supplemental material and data
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Observation of the Identical Rigidity Dependence of He, C, and O Cosmic Rays at High Rigidities by the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 119, 251101 (2017), Citations: 282, View supplemental material and data
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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
Phys. Rev. Lett. 117, 231102 (2016), Citations: 369, View supplemental material and data
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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
Phys. Rev. Lett. 117, 091103 (2016), Citations: 556, View supplemental material and data
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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
Phys. Rev. Lett. 115, 211101 (2015), Citations: 526, View supplemental material and data
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Precision Measurement of the Proton Flux in Primary Cosmic Rays from Rigidity 1 GV to 1.8 TV with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 114, 171103 (2015), Citations: 961, View supplemental material and data
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Precision Measurement of the (${\rm e}^+$ + ${\rm e}^−$) Flux in Primary Cosmic Rays from 0.5 GeV to 1 TeV with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 113, 221102 (2014), Citations: 375, View supplemental material and data
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Electron and Positron Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 113, 121102 (2014), Citations: 624, View supplemental material and data
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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
Phys. Rev. Lett. 113, 121101 (2014), Citations: 681, View supplemental material and data
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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
Phys. Rev. Lett. 110, 141102 (2013), Citations: 1,354, View supplemental material and data

* Citation information from High-Energy Physics Literature Database.