Energetic ion and electron phase space densities in the magnetosphere of Uranus.

Voyager 2 Low Energy Charged Particles (LECP) data from the magnetosphere of Uranus have been analyzed to obtain proton and electron phase space density profiles. The Uranus proton profiles show an approximately exponential decline with decreasing radius for L ~ 9 in a relatively dense thermal plasma region with intense wave activity. An analogy with the magnetospheres of Earth, Jupiter, and Saturn suggests a plasmasphere at Uranus. The ion flux tube content in the Uranian radiation belt is less than that in the other three cases.