Nonlinear Evolution of Radiation Belt Electron Fluxes Interacting With Oblique Whistler Mode Chorus Emissions

Abstract. A survey of plasma wave observations at Jupiter obtained by the plasma wave instrument on board the Galileo spacecraft is presented. The observations indicate that chorus emissions are observed commonly in the Jovian magnetosphere near the magnetic equator in the approximate radial range 6<r<10 RJ. The survey includes almost all local times but not equally sampled in radial distance due to the spacecraft trajectory. The data suggest that chorus emissions are somewhat more intense on the dayside, but this may be a result of insufficient nightside observations. The orbit of Galileo is also restricted to ±3° of the Jovigraphic equator, but the tilt of the magnetic field permits coverage of a range of magnetic latitudes of −13°<λmag<+13°. The similarities of chorus emissions to terrestrial observations are a good reason to speculate that Jovian chorus emission may play a significant role in the stochastic acceleration of electrons in the radial range 6–10 RJ as recent studies indicate. These electrons may then be transported inward by radial diffusion where they are additionally accelerated to form the synchrotron radiation belt source.

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Radiation belt electron scattering by whistler-mode chorus in the Jovian magnetosphere: Importance of ambient and wave parameters

Earth and Planetary Physics ◽

10.26464/epp2018001 ◽

2018 ◽

Vol 1 (2) ◽

pp. 1-14 ◽

Cited By ~ 1

Author(s):

BinBin Ni ◽

◽

Jing Huang ◽

YaSong Ge ◽

Jun Cui ◽

...

Keyword(s):

Electron Scattering ◽

Radiation Belt ◽

Whistler Mode ◽

Jovian Magnetosphere ◽

Wave Parameters

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Theoretical and numerical analysis of radiation belt electron precipitation by coherent whistler mode waves

Journal of Geophysical Research Space Physics ◽

10.1002/2014ja019809 ◽

2014 ◽

Vol 119 (6) ◽

pp. 4370-4388 ◽

Cited By ~ 12

Author(s):

V. Harid ◽

M. Gołkowski ◽

T. Bell ◽

U. S. Inan

Keyword(s):

Numerical Analysis ◽

Radiation Belt ◽

Electron Precipitation ◽

Whistler Mode ◽

Whistler Mode Waves ◽

Theoretical And Numerical Analysis

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Statistics of whistler mode waves in the outer radiation belt: Cluster STAFF‐SA measurements

Journal of Geophysical Research Space Physics ◽

10.1002/jgra.50312 ◽

2013 ◽

Vol 118 (6) ◽

pp. 3407-3420 ◽

Cited By ~ 135

Author(s):

Oleksiy Agapitov ◽

Anton Artemyev ◽

Vladimir Krasnoselskikh ◽

Yuri V. Khotyaintsev ◽

Didier Mourenas ◽

...

Keyword(s):

Radiation Belt ◽

Outer Radiation Belt ◽

Whistler Mode ◽

Whistler Mode Waves

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Rapid energization of radiation belt electrons by nonlinear wave trapping

Annales Geophysicae ◽

10.5194/angeo-26-3451-2008 ◽

2008 ◽

Vol 26 (11) ◽

pp. 3451-3456 ◽

Cited By ~ 29

Author(s):

Y. Katoh ◽

Y. Omura ◽

D. Summers

Keyword(s):

Nonlinear Wave ◽

Significant Role ◽

Radiation Belt ◽

Magnetic Mirror ◽

Generation Process ◽

Whistler Mode ◽

Wave Trapping ◽

Particle Simulations ◽

Radiation Belt Electrons ◽

Particle Energization

Abstract. We show that nonlinear wave trapping plays a significant role in both the generation of whistler-mode chorus emissions and the acceleration of radiation belt electrons to relativistic energies. We have performed particle simulations that successfully reproduce the generation of chorus emissions with rising tones. During this generation process we find that a fraction of resonant electrons are energized very efficiently by special forms of nonlinear wave trapping called relativistic turning acceleration (RTA) and ultra-relativistic acceleration (URA). Particle energization by nonlinear wave trapping is a universal acceleration mechanism that can be effective in space and cosmic plasmas that contain a magnetic mirror geometry.

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