Chaotic scattering of trapped relativistic electrons in the magnetosphere by whistler waves

Spencer Kuo, Paul Kossey, James T. Huynh, Steven S. Kuo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the magnetosphere, energetic electrons in the radiation belts are trapped by the Earth's dipole magnetic field and undergo bouncing motion about the geomagnetic equator. Those very energetic electrons (in MeV level) have strong impact on passing satellites. The behaviors of the trajectories of these electrons interacting with a large amplitude whistler wave are explored, with the electron energy and wave amplitude as variable parameters. A surface of section technique is used to examine the chaoticity of the system graphically. Once the trajectory of an electron becomes chaotic, it can wander into the loss cone and subsequently, precipitates into the ionosphere and/or the upper atmosphere. The bouncing motion of the electron is a key factor to cause chaotic behavior in the interaction. However, the commencement of chaotic behavior in the electron trajectories also requires the whistler wave field to exceed a threshold. The threshold wave magnetic field for the onset of chaos can be as low as 0.25% of the geomagnetic field for those energetic electrons having kinetic energies larger than 250 keV, i.e., γ 0 > 1.5. Waves with amplitudes at this level have been observed propagating between hemispheres. This threshold increases slightly with γ 0 ∼ 3, i.e., for those MeV energetic electrons.

Original languageEnglish (US)
Title of host publicationIEEE International Conference on Plasma Science
Pages425
Number of pages1
StatePublished - 2004
EventIEEE Conference Record - Abstracts: The 31st IEEE International Conference on Plasma Science, ICOPS2004 - Baltimore, MD, United States
Duration: Jun 28 2004Jul 1 2004

Other

OtherIEEE Conference Record - Abstracts: The 31st IEEE International Conference on Plasma Science, ICOPS2004
CountryUnited States
CityBaltimore, MD
Period6/28/047/1/04

Fingerprint

magnetospheres
scattering
electrons
thresholds
trajectories
magnetic equator
radiation belts
electron trajectories
upper atmosphere
geomagnetism
hemispheres
magnetic fields
ionospheres
chaos
precipitates
cones
kinetic energy
electron energy
dipoles
causes

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Kuo, S., Kossey, P., Huynh, J. T., & Kuo, S. S. (2004). Chaotic scattering of trapped relativistic electrons in the magnetosphere by whistler waves. In IEEE International Conference on Plasma Science (pp. 425). [7P3]

Chaotic scattering of trapped relativistic electrons in the magnetosphere by whistler waves. / Kuo, Spencer; Kossey, Paul; Huynh, James T.; Kuo, Steven S.

IEEE International Conference on Plasma Science. 2004. p. 425 7P3.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kuo, S, Kossey, P, Huynh, JT & Kuo, SS 2004, Chaotic scattering of trapped relativistic electrons in the magnetosphere by whistler waves. in IEEE International Conference on Plasma Science., 7P3, pp. 425, IEEE Conference Record - Abstracts: The 31st IEEE International Conference on Plasma Science, ICOPS2004, Baltimore, MD, United States, 6/28/04.
Kuo S, Kossey P, Huynh JT, Kuo SS. Chaotic scattering of trapped relativistic electrons in the magnetosphere by whistler waves. In IEEE International Conference on Plasma Science. 2004. p. 425. 7P3
Kuo, Spencer ; Kossey, Paul ; Huynh, James T. ; Kuo, Steven S. / Chaotic scattering of trapped relativistic electrons in the magnetosphere by whistler waves. IEEE International Conference on Plasma Science. 2004. pp. 425
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