Speaker
Description
Traditionally, Galactic Cosmic Rays (GCR) models are used as a boundary condition input to the
deterministic or stochastic (e.g. Monte Carlo) based radiation transport codes with the goal of extracting
dosimetric quantities of interest such as dose, dose equivalent, effective dose, etc. at a desired target
point within the spacecraft. To compute the dosimetric quantities of interest, the geometry and mass
property of the spacecraft which represent the structure and detector are defined through a ray-tracing
process. The transported fluxes are then used to interpolate on the ray-traces at different depths of
materials to complete the computation.
In this talk, three widely used free space GCR models are evaluated against measurements by the
Alpha Magnetic Spectrometer 2 (AMS2) and the Payload for Antimatter Matter Exploration and Lightnuclei
Astrophysics (PAMELA) detectors. The AMS2 is mounted on the main truss of the International
Space Station (ISS), while PAMELA is mounted on the exterior of the Russian Resurs DK1 satellite. For the
three GCR models particular emphasis is put on energy region where GCR peaks (i.e. Ek < 3 GeV) to
evaluate the discrepancies between the models and the AMS2/PAMELA measurements.
