Energetic Particles in the Magnetosphere of Neptune

Thw Low Energy Charged Particle (LECP) instrument on Voyager 2 measured low-energy electrons (E >~ 22 keV) and ions (E >~ 28 keV) within the magnetosphere of Neptune. The magnetospheric particle population consists principally of electrons and protons, with electron intensities substantially greater than those of protons at a given energy. The proton spectra ranged from simple power laws outside the orbit of Triton to hot (kT ~ 60 keV) Maxwellians inside that radial distance (~ 14.4 R sub N).