Sources, Losses, and Transport of Magnetospherically Trapped Particles

Williams, D. J.

doi:10.1007/978-94-009-3693-5_24

Cited by 6 publications

(2 citation statements)

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“…The effect of this error on D is not clear although Williams (1970) states that it should be small. Although the high energy inner belt protons are essentially stable to short term fluctuations, over a period of several years the profile of the outer portion of this belt has changed.…”

Section: Analyses Of Time Dependent Features Of Trapped Protonsmentioning

confidence: 99%

“…This paper will review the available information on the radial diffusion of trapped particles. Recent reviews of magnetospheric particle diffusion in general have been presented by F/ilthammar (1971) and by Williams (1970), and a treatment of much of the fundamental theory of charged particle motion in a distorted magnetosphere with time dependent fields is included in the treatise of Roederer (1970). Although the subject of radial diffusion is still very much in a developing stage, the evidence, both experimental and theoretical, is sufficiently strong and varied that a comprehensive review of this process now seems warranted.…”

Section: Introductionmentioning

confidence: 99%

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The radial diffusion of trapped particles induced by fluctuating magnetospheric fields

Walt

1971

Space Sci Rev

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Small fluctuations in magnetospheric electric and magnetic fields lead to random changes in the radial positions of trapped particles. The characteristics of this radial diffusion are described theoretically in terms of the statistical properties of the field fluctuations, in particular the power spectra of the various spatial components. A large body of trapped particle data demonstrates that diffusion with the predicted properties actually takes place. These data include the average radial and energy distributions and the time variations in particle fluxes. This radial diffusion has a major influence on the structure of the radiation belts; and since the net flow of particles is inward at most positions of the magnetosphere, the process acts as a strong source of trapped particles. Further experiments are needed to establish the importance of this mechanism relative to magnetic storm effects and to collective instabilities.

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Section: Analyses Of Time Dependent Features Of Trapped Protonsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%