A new physical model of the electron radiation belts of Jupiter inside Europa's orbit

摘要

A new global physical model of the electron radiation belts of Jupiter inside the orbit of Europa is presented. It is an update of the Office National d'Etudes et de Recherches Aérospatiales model Salammb? proposed by Sicard and Bourdarie (2004) that now integrates a contribution of the wave-particle interaction above the orbit of Io. In addition, a revisited and more realistic boundary condition near Europa is implemented. The new Salammb? model is validated against the in situ flux measurements obtained by the Pioneer 10, Pioneer 11, and Voyager 1 missions. The role of the wave-particle interaction is discussed by investigating its effect on the predicted in situ fluxes. In particular, the interaction appears in our simulations as a strong pitch angle scattering process explaining the flux depletions intensities near the orbit of Io as well as the flux intensities near the spacecraft perijoves.