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Pitch Angle Scattering of Upgoing Electron Beams in Jupiter's Polar Regions by Whistler Mode Waves
Author(s) -
Elliott S. S.,
Gurnett D. A.,
Kurth W. S.,
Clark G.,
Mauk B. H.,
Bolton S. J.,
Connerney J. E. P.,
Levin S. M.
Publication year - 2018
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2017gl076878
Subject(s) - physics , whistler , pitch angle , jovian , jupiter (rocket family) , electron , scattering , electron precipitation , van allen radiation belt , computational physics , magnetic field , optics , magnetosphere , geophysics , astrophysics , saturn , spacecraft , astronomy , nuclear physics , quantum mechanics , planet
The Juno spacecraft's Jupiter Energetic‐particle Detector Instrument has observed field‐aligned, unidirectional (upgoing) electron beams throughout most of Jupiter's entire polar cap region. The Waves instrument detected intense broadband whistler mode emissions occurring in the same region. In this paper, we investigate the pitch angle scattering of the upgoing electron beams due to interactions with the whistler mode waves. Profiles of intensity versus pitch angle for electron beams ranging from 2.53 to 7.22 Jovian radii show inconsistencies with the expected adiabatic invariant motion of the electrons. It is believed that the observed whistler mode waves perturb the electron motion and scatter them away from the magnetic field line. The diffusion equation has been solved by using diffusion coefficients which depend on the magnetic intensity of the whistler mode waves.