Speaker
Dr
Davide Grandi
(INFN - Milano Bicocca)
Description
We developed a code for Cosmic Rays trajectory reconstruction in the Earth Magnetosphere, this has been developed with last models of Internal (IGRF-11) and External (Tsyganenko 1996 and 2005) field components. The backtracing technique was used to separate Primary Cosmic Rays Particles, in case of allowed trajectory, from Secondary particles, in case of forbidden trajectory. The accuracy of trajectory reconstruction is strictly bound to magnetic field models precision. So we compared our model calculations with and without the external field model with satellite data in past periods, in particular GOES (1998) and CLUSTER (2004) data. For both periods T05 reproduces the magnetc field
components with good accuracy. We used our model also with data taken by CLUSTER during the last solar active period (from 2011 to 2013) and we could test the agreement using the External field T05, specifically designed for solar storms. The fractions of primaries, secondaries and trapped partcles were found to depend on the employed models, i.e., during quiet and disturbed period, for instance during a flare.
Primary author
Dr
Davide Grandi
(INFN - Milano Bicocca)
