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Published July 15, 1994 | Published
Journal Article Open

Radial Diffusion of Relativistic Electrons in Neptune's Magnetosphere

Abstract

Measurements of ≳1 MeV electrons in Neptune's magnetosphere from L ≈ 4 to 14 are well represented by solutions of a model radial diffusion equation that includes losses due to absorption by the satellite Proteus. The model provides estimates of the radial diffusion coefficient, which is 5 × 10^(−8)(L/5)^8 s^(−1), and the outer boundary energy spectrum, which is an exponential with an e-folding energy of 0.1 MeV. The diffusion coefficient is consistent with theoretical estimates based on the assumption that diffusion is driven by atmospheric neutral winds.

Additional Information

Copyright 1994 by the American Geophysical Union. (received March 16, 1994; accepted May 12, 1994.) This work was supported by NASA under contract NAS7-918 and grant NAGW-2402.

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