The trapped radiation belts of Jupiter

The preliminary results from the Trapped Radiation Detector instruments of the University of California at San Diego aboard Pioneers 10 and 11 for making measurements in the Jupiter magnetosphere are reviewed. Attention is given to the instrument and the flyby trajectories and results of the following investigations are presented: interplanetary electrons of Jovian origin, the configuration of the magnetosphere, interactions between the trapped radiation belts and Jupiter's satellites, (absorption of trapped radiation, the effect of angular dimensions, and the injection of energetic radiation), the behavior of electrons in the inner Jupiter magnetosphere, and multiple peaks near Pioneer 11 periapsis.