Numerical simulations of non-adiabatic particle motions in the Jovian magnetosphere; comparisons with Ulysses observations

Abstract

The Ulysses encounter with Jupiter gave a unique opportunity for the study of ions in the Jovian day side in the range 0.3 < ( E/nuc) < 6 MeV. The EPAC experiment has already provided a wealth of interesting results concerning the composition and the anisotropies in the magnetosphere (Krupp et al., Planet. Space Sci.41, 953, 1993), however a more complete understanding of the observations is still lacking from the scientific literature. This paper contributes to the field with the analysis of numerical simulations of non-adiabatic trajectories in Jupiter's current sheet and the calculation of the appropriate anisotropies. The results presented here differ from the existing numerical results in that they seem to be in good agreement with the observations of both the Ulysses and Voyager encounters.