行星際結構對於高能粒子影響效應分析

The energetic particles attacking the Earth come from the solar energeticparticles (SEPs, also known as solar cosmic rays) produced by solar storms andthe galactic cosmic rays (GCRs) related to supernova explosions. The solar windplasma and magnetic fields, as well as the transient interplanetary structures,have certain effects on the acceleration, transport, and dissipation of energeticparticles. Considering the great impact of interplanetary coronal mass ejections(ICMEs) on the solar-terrestrial environment, the diversity of ICME structure, andthe richness of ICME interaction with particles, this project focuses on two issuesof ICME-associated SEP acceleration and GCR modulation. By combining thespace-borne observations around 1 AU and close to the Sun with the groundbased neutron measurements, the characteristics of the leading shock, sheathregion, and main body of single ICME events will be quantified and theirinfluences on the lightcurves or spectra of SEP and GCR will also beinvestigated. Furthermore, we attempt to find out the dominant parameter(s) inthe changes of energetic particle fluxes by analyzing the complex events ofICME-ICME and ICME-transient structure. Our research results will provide theimportant information on the warning of severe space weather.