Topical Discussion Meeting - Cosmic-ray modulation by solar wind structures

Catia Grimani (University of Urbino "Carlo Bo")
Monday 27/11, 17:15 - 18:30, Delvaux

The understanding of galactic cosmic-ray (GCR) short-term variations requires a deep expertise in cosmic-ray, solar and heliospheric physics. Unfortunately, the majority of work on this topic was carried out in the past with neutron monitors which do not allow to follow in detail the dynamics of individual depressions, being the low energy part of the cosmic-ray spectrum undetected by ground instruments. High-resolution particle detectors in space offer a unique chance to disentangle the role of individual solar wind structures that locally reduce the GCR flux. Data from the LISA Pathfinder satellite, in the Lagrange Point L1 gathered during the descending phase of this solar cycle 24, may be used as a starting point for a general discussion following from the comparison of data gathered by both ground and space detectors.