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Comparison of quasi-linear predictions with a computer simulation of whistler waves in unstable plasmas

Published online by Cambridge University Press:  13 March 2009

S. Cuperman  and
L. R. Lyons
S. Cuperman
Affiliation:
Space Enviroment Laboratory, Environmental Research Laboratories, National Oceanic and Atmospheric Administration, Boulder, Colorado 80302
L. R. Lyons
Affiliation:
Space Enviroment Laboratory, Environmental Research Laboratories, National Oceanic and Atmospheric Administration, Boulder, Colorado 80302
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Abstract

The quasi-linear concept of plateau formation along resonant diffusion surfaces is compared with the time evolution of the electron distribution function during a computer simulation experiment of whistler-mode waves in unstable plasmas. It is found that, as the wave intensities grow, plateau formation does indeed occur, with the distribution function becoming constant along diffusion surfaces at the time when wave intensities maximize. Following the formation of the plateaus, both the wave intensities and the slope of the distribution function along diffusion surfaces oscillate in a manner suggesting msh;mode coupling. Tbe slope of the distribution function along diffusion surfaces, which controls the linear wave growth rate, also gives good predictions of the sign of the actual wave growth rate during the experiment.

Type
Research Article
Information
Journal of Plasma Physics , Volume 11 , Issue 3 , June 1974 , pp. 397 - 401
Copyright
Copyright © Cambridge University Press 1974

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References

REFERENCES

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