PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Cosmic-Ray Physics (Direct, CRD)
Precision Measurement of Daily Proton and Helium Fluxes by the Alpha Magnetic Spectrometer
Y. Jia* and  On behalf of the AMS Collaboration
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Pre-published on: August 08, 2023
Published on: —
Abstract
The precision measurement of the daily proton and helium fluxes will be presented. The period of observation covers 11 year solar cycle from the ascending phase through its maximum going toward its minimum. Time variations of the fluxes on different time scales associated to the solar activity are presented. Detailed time variations of fluxes and ratio will be also presented. Remarkably, below 2.4 GV a hysteresis between the helium to proton flux ratio and the helium flux was observed at greater than the 7σ level.
DOI: https://doi.org/10.22323/1.444.0073
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