Speaker
Description
The Earth is constantly hit by energetic particles originating from galactic sources. The flux of these particles is altered by the magnetized solar wind in the heliosphere. These modulation effects occur on different timescales: long-term variations are driven by the 11-year solar cycle, while short-term decreases are caused by transient structures such as Forbush decreases (FDs).
In this talk, we investigate the solar modulation of galactic cosmic rays (GCRs) using published high-precision daily fluxes from the Alpha Magnetic Spectrometer (AMS-02) onboard the International Space Station. AMS-02 is a state-of-the-art cosmic ray detector equipped with multiple subdetectors, enabling accurate charge and energy measurements from hundreds of MeV up to the TeV range. This enables detailed studies of both long-term solar cycle effects and short-term modulation events, with a focus on the charge-sign dependence predicted by drift models. The results help to characterize the role of solar magnetic polarity in cosmic ray modulation.
