NUMERICAL SIMULATIONS OF NONADIABATIC PARTICLE MOTIONS IN THE JOVIAN MAGNETOSPHERE - COMPARISONS WITH ULYSSES OBSERVATIONS

The Ulysses encounter with Jupiter gave a unique opportunity for the s tudy 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 res ults concerning the composition and the anisotropies in the magnetosph ere (Krupp et al., Planet. Space Sci. 41, 953, 1993), however a more c omplete understanding of the observations is still lacking from the sc ientific literature. This paper contributes to the held with the analy sis of numerical simulations of non-adiabatic trajectories in Jupiter' s current sheet and the calculation of the appropriate anisotropies. T he results presented here differ from the existing numerical results i n that they seem to be in good agreement with the observations of both the Ulysses and Voyager encounters.