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Guided propagation of Alfvén waves in the magnetosphere

Published online by Cambridge University Press:  13 March 2009

J. A. Fejer  and
Kaifong Lee
J. A. Fejer
Affiliation:
Department of Applied Electrophysics, University of California, San Diego and Institute for Radiation Physics and Aerodynamics
Kaifong Lee
Affiliation:
Department of Applied Electrophysics, University of California, San Diego and Institute for Radiation Physics and Aerodynamics
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Abstract

The guided propagation of Alfvén waves in a cold plasma is discussed from several points of view. First the field of a line source is calculated at infinity. This calculation leads to a divergence in the radiated power in two directions forming very small angles with the magnetic field.

The divergence is removed if the line source is replaced by a strip source of finite width. It is shown that propagation from a strip source only a few kilo-metres wide is strongly guided by the magnetic field, with almost no spreading, along a field line extending up to, say, 4 earth radii for wave periods of about 100 sec.

Type
Research Article
Information
Journal of Plasma Physics , Volume 1 , Issue 4 , November 1967 , pp. 387 - 406
Copyright
Copyright © Cambridge University Press 1967

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References

REFERENCES

Arbel, E. & Felsen, L. B. 1963 Theory of Radiation from Sources in Anisotropic Media, Parts I and II, in Electromagnetic Theory and Antennas, pp. 391–459. Ed. by Jordan, E. C.. New York: Pergamon Press.Google Scholar
Booker, H. G. 1962 Guidance of radio and hyciromagnetic waves in the magnetosphere, J. Geophys. Res. 67, 4135–62.CrossRefGoogle Scholar
Booker, H. G. & Dyce, R. B. 1965 Dispersion of waves in a cold magnetoplasma from hydromagnetic to whistler frequencies. Radio Science, 69D, 463–92.Google Scholar
Booker, H. G. & Walkinshaw, W. 1946 The mode theory of tropospheric refraction, Meteorological Factors in Radio-Wave Propagation, pp. 80–127. Physical Society, London.Google Scholar
Budden, K. G. 1961 Radio Waves in the Ionosphere. Cambridge University Press.Google Scholar
Cummings, W. D. & Dessler, A. J. 1967 Field-aligned currents in the magnetosphere, J. Geophys. Res. 72, 1007–13.CrossRefGoogle Scholar
Drell, S. D., Fory, H. H. & Ruderman, M. A. 1965 Drag and propulsion of large satellites in the ionosphere: an Alfvén propulsion engine in space, J. Geophys. Res. 70, 3131–45.CrossRefGoogle Scholar
Dungey, J. W. 1955 Electrodynamics of the outer atmosphere. Report of Conference on the Physics of the Ionosphere. Physical Society, London.Google Scholar
Hanson, W. B. 1965 Structure of the ionosphere. In Satellite Environment Handbook. (Ed. by Johnson, F. S.) Stanford University Press.Google Scholar
Haslegrove, J. 1955 Ray theory and a new method for ray tracing. In Report of the Conference on the Physics of the Ionosphere, p. 355. Physical Society, London.Google Scholar
Jeffreys, H. & Jeffreys, B. 1950 Methods of Mathematical Physics. Cambridge University Press.Google Scholar
Newcomb, W. A. 1957 The hydromagnetic wave guide. In Magnetohydrodynamics, (Ed. by Landshoff, R. M..) Stanford University Presss.Google Scholar
Obayashi, T. & Jacobs, J. A. 1959 Geomagnetic oscillations at middle latitudes, J. Geophys. Res. 64, 1395.Google Scholar
Stix, T. H. 1962 The Theory of Plasma Waves. McGraw-Hill.Google Scholar
Walker, A. D. M. 1966 a The theory of the guiding of radio waves in the upper atmosphere. J. Atmos. Terr. Phys. 28, 747–67.CrossRefGoogle Scholar
Walker, A. D. M. 1966 b The theory of guiding of radio waves in the exosphere. I. Guiding of whistlers. J. Atmos. Terr. Phys. 28, 807–22.CrossRefGoogle Scholar
Walker, A. D. M. 1966 c The theory of guiding of radio waves in the exosphere. II. Waves propagating with small dispersion. J. Atmos. Terr. Phys. 28, 1039–56.CrossRefGoogle Scholar