EARLY ENERGETIC PARTICLE RESULTS FROM JUPITER

The NASA Galileo spacecraft arrived at Jupiter on 7 December 1995, car rying onboard the Energetic Particles Detector (EPD) designed and buil t by the Applied Physics Laboratory and the Max Planck Institute for A eronomy. The first Energetic Particles Detector data from Jupiter, col lected on arrival during Galileo's passage through Io's plasma torus a nd at the flyby of Io, were received at Earth in June 1996. Data recei ved steadily since that time continually show many surprises, new resu lts, and discoveries. In this article we describe some of our early re sults from Jupiter, including the discovery of intense, bidirectional, magnetic-field-aligned electron beams at Io-a dramatic result of Io's interaction with Jupiter's magnetosphere.