Recent results of the AMS-02 experiment on the ISS

4th Symposium on Prospects in the Physics of Discrete Symmetries

Casaus, Jorge^1

Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, CIEMAT, Av. Complutense 22, Madrid

E-28040, Spain^1

关键词: Alpha magnetic spectrometers;    Electron flux;    Energy dependence;    Energy ranges;    International Space stations;    Precise measurements;    Proton flux;    Spectral indices;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/631/1/012046/pdf
DOI  :  10.1088/1742-6596/631/1/012046

来源: IOP

【 摘 要 】

The Alpha Magnetic Spectrometer has recently released a first set of precise measurements of cosmic rays detected on the International Space Station in the GeV to TeV energy range. The fluxes of positrons, electrons and protons are presented. Neither of the fluxes is compatible with a single power law. Both the electron flux and the positron flux change their behavior at ∼30 GeV but the fluxes are significantly different in their magnitude and energy dependence. Between 20 and 200 GeV the positron spectral index is significantly harder than the electron spectral index. Above ∼200 GeV the positron fraction no longer exhibits an increase with energy. The proton flux is progressively hardening above rigidity ∼100 GV. The detailed variation with rigidity of the proton flux spectral index is presented.