 Eventually at the distances greater than roughly 40 "R"J (in the outer magnetosphere) this plasma is no longer confined by the magnetic field and leaves the magnetosphere through the magnetotail.As cold, dense plasma moves outward, it is replaced by hot, low-density plasma, with temperatures of up to 20 keV (200 million K) or higher) moving in from the outer magnetosphere.Some of this plasma, adiabatically heated as it approaches Jupiter, may form the radiation belts in Jupiter's inner magnetosphere.