On the injection and scattering of protons in Jupiter's magnetosphere

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Abstract
We investigate a model by which 10 keV protons accelerated on Jovian auroral field lines are scattered and localized to the magnetic equator. The criterion that the beam density be sufficiently large to generate magnetosonic waves leads to the evaluation of proton beam fluxes consistent with recent Voyager observations of a hot high β plasma sheet in the magnetosphere. A model of the Alfven speed in the plasma sheet for both inbound and outbound legs of the Voyager 1 encounter is presented. This model confirms Piddington's limit of departure from rigid corotation beyond the point where the rigid body corotation speed equals the Alfven speed. Finally, we explore the possibility of nonadiabatic scattering of super‐Alfvenic ions by magnetohydrodynamic waves throughout the plasma sheet as a basis for high‐energy tail formation of ambient particle distributions.