Pitch Angle Scattering of Upgoing Electron Beams in Jupiter's Polar Regions by Whistler Mode Waves

S. S. Elliott; D. A. Gurnett; W. S. Kurth; G. Clark; B. H. Mauk; S. J. Bolton; J. E. P. Connerney; S. M. Levin

doi:10.1002/2017GL076878

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Pitch Angle Scattering of Upgoing Electron Beams in Jupiter's Polar Regions by Whistler Mode Waves

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Pitch Angle Scattering of Upgoing Electron Beams in Jupiter's Polar Regions by Whistler Mode Waves

S. S. Elliott, D. A. Gurnett, W. S. Kurth, G. Clark, B. H. Mauk, S. J. Bolton, J. E. P. Connerney and S. M. Levin

Geophysical research letters, Vol.45(3), pp.1246-1252

02/16/2018

DOI: 10.1002/2017GL076878

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Abstract

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.

Geology

Geosciences, Multidisciplinary

Physical Sciences

Science & Technology

Details

Title: Subtitle: Pitch Angle Scattering of Upgoing Electron Beams in Jupiter's Polar Regions by Whistler Mode Waves
Creators: S. S. Elliott - University of Iowa
D. A. Gurnett - University of Iowa
W. S. Kurth - University of Iowa
G. Clark - Johns Hopkins University Applied Physics Laboratory
B. H. Mauk - Johns Hopkins University Applied Physics Laboratory
S. J. Bolton - Southwest Research Institute
J. E. P. Connerney - Goddard Space Flight Center
S. M. Levin - Jet Propulsion Laboratory
Resource Type: Journal article
Publication Details: Geophysical research letters, Vol.45(3), pp.1246-1252
DOI: 10.1002/2017GL076878
ISSN: 0094-8276
eISSN: 1944-8007
Publisher: Amer Geophysical Union
Number of pages: 7
Grant note: 699041X / NASA; National Aeronautics & Space Administration (NASA) Southwest Research Institute
Language: English
Date published: 02/16/2018
Academic Unit: Physics and Astronomy
Record Identifier: 9984455269202771

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