SIMULATION OF CHANGED PARTICLE MOTION IN JUPITERS MAGNETOSPHERE

Particle motion in the Jovian magnetodisc is simulated in a rigidly co rotating frame at radial distances from 50 to 150 Jovian radii. Result s are compared with existing Pioneer and Voyager data to determine the accuracy of the simulation model. Particle orbits are classified into three distinct classes based on disjoint formations in phase space, a nd certain orbits are shown to have chaotic properties. The simulation is used to determine specific energies required to escape the magneto sphere through the neutral plane centered at the magnetic equator. The model should help to explain the detailed features observed for diffe rent charged particle species and energies within the Jovian magnetosp here, and will also provide a predictive and analytical tool for deali ng with Galileo observations.