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Landau damping of long wavelength ion acoustic waves in a collision-free plasma with a gravity field

Published online by Cambridge University Press:  13 March 2009

D. Parkinson
Affiliation:
European Space Research Institute, Fraseati (Rome), Italy†
K. Schindler
Affiliation:
European Space Research Institute, Fraseati (Rome), Italy†

Abstract

Ion acoustic waves propagating in a collision-free gravity-supported one-dimeiisional plasma are studied, including conditions where the wavelength is of the order of the scale height of the equilibrium plasma. It turns out that the fluid dynamic steepening tendency of waves propagating in the direction of decreasing density is overcome by Landau damping up to wavelengths of the order of the scale height or even larger, depending on the ratio of the electron and the ion temperatures.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1969

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References

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