Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-29T13:37:27.440Z Has data issue: false hasContentIssue false
  • English
  • Français

Pitch angle and energy diffusion coefficients from resonant interactions with ion–cyclotron and whistler waves

Published online by Cambridge University Press:  13 March 2009

Lawrence R. Lyons
Lawrence R. Lyons
Affiliation:
Space Environment Laboratory, National Oceanic and Atmospheric Administration, Boulder, Colorado 80302
Get access Rights & Permissions [Opens in a new window]

Abstract

General relations for quasi-linear diffusion coefficients in pitch angle and energy are applied to resonant particle interactions with ion–cyclotron and whistler waves. Expressions for the diffusion coefficients, valid for any distribution of wave energy with frequency and wave normal angle, are derived and normalized to be independent of the ambient magnetic field intensity and the electron density. The results illustrate how resonant particle diffusion rates vary with pitch angle and energy, and how the diffusion rates depend upon the distribution of wave energy.

Type
Research Article
Information
Journal of Plasma Physics , Volume 12 , Issue 3 , December 1974 , pp. 417 - 432
Copyright
Copyright © Cambridge University Press 1974

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Cornwall, J. M., Coroniti, F. V. & Thorne, R. M. 1970 J. Geophys. Res. 75, 4699.CrossRefGoogle Scholar
Dunkel, N. & Helliwell, R. A. 1969 J. Geophys. Res. 74, 6371.CrossRefGoogle Scholar
Kennel, C. F. 1969 Rev. Geophys. 7, 379.CrossRefGoogle Scholar
Kennel, C. F. & Engelmann, F. 1966 Phys. Fluids, 9, 2377.CrossRefGoogle Scholar
Kennel, C. F. & Petchek, H. E. 1966 J. Geophys. Res. 71, 1.CrossRefGoogle Scholar
Lyons, L. R. 1974 J. Plasma Phys. 12, 45.CrossRefGoogle Scholar
Lyons, L. R., Thorne, R. M. & Kennel, C. F. 1971 J. Plasma Phys. 6, 589.CrossRefGoogle Scholar
Lyons, L. R., Thorne, R. M. & Kennel, C. F. 1972 J. Geophys. Res. 77, 3455.CrossRefGoogle Scholar
Stix, T. H. 1962 The Theory of Plasma Waves. McGraw-Hill.Google Scholar