Abstract
We discuss the electron loss cone instability as a function of hot and cold electron densities and the magnetic field strength. A simple marginal stability algorithm permits a rapid estimate of the unstable frequency band. While the growth rate always peaks near the cold upper hybrid frequency, the group velocity parallel to the magnetic field can have zeros near odd half harmonics of the electron cyclotron frequencies, suggesting that the instability may be nonconvective there.
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Ashour-Abdalla, M., Instability theory of electrostatic half-harmonic electron gyrofrequency waves in the magnetosphere: a review, Ann. Geophys., 1975 (in press).
Ashour-Abdalla, M. & S.W.H. Cowley, Wave particle interactions near the geostationary orbit, in Magnetospheric Physics (Ed. B.M. McCormac ) p. 270, Reidel, Dordrecht, Holland, 1974.
Ashour-Abdalla, M., G. Chanteur & R. Pellat, A contribution to the theory of the electrostatic half-harmonic electron gyrofrequency waves in the magnetosphere, J. Geophys. Res., 1975 (in press).
Brice, N. & C. Lucas, Influence of magnetospheric convection and polar wind on loss of electrons from the outer radiation belt. J. Geophys. Res. 76, 900 (1971).
Chappell, C.R., K.K. Harris & G.W. Sharp, A study of the influence of magnetic activity on the location of the plasmapause as measured by OGO-5, J. Geophys. Res. 75, 50 (1970).
Cornwall, J.M., F.V. Coroniti & R.M. Thome, Turbulent loss of ring current protons, J. Geophys. Res. 75, 4699 (1970).
Dory, R.A., G.E. Guest & E.G. Harris, Unstable electrostatic plasma waves propagation perpendicular to a magnetic field, Phys. Rev. Lett. 14, 131 (1965).
Fredricks, R.W., Plasma instability at (n + 1/2) fc and its relationship to some satellite observations, J. Geophys. Res. 76, 5344 (1971).
Fredricks, R.W. & F.L. Scarf, Recent studies of magnetospheric electric field emissions about the electron gyrofrequency, J. Geophys. Res. 78, 310 (1973).
Fredricks, R.W., Wave particle interactions in the outer magnetosphere: a review, Presented at Neil Brice Memorial Symposium, Frascati, 1974.
Gaffey, J.D. & R. Le Quey, Upper hybrid resonance in the magnetosphere, Preprint, 1974.
Gurnett, D.A. & R.R. Shaw, Electromagnetic radiation trapped in the magneto- sphere above the plasma frequency, J. Geophys. Res. 78, 8136 (1973).
Gurnett, D.A. & L.A. Frank, Thermal and suprathermal plasma densities in the outer magnetosphere, J. Geophys. Res. 79, 2355 (1974).
Harris, E.G., Unstable plasma oscillations in a magnetic field, Phys. Rev. Lett. 2, 34 (1959).
Ioannidis, G. & N. Brice, Plasma densities in the jovian magnetosphere: plasma slingshot or Maxwell demon? ICARUS 14, 360 (1971).
Karpman, V.I., Ju K. Alekhin, N.D. Borisov & N.A. Rjabova, Electrostatic electron- cyclotron waves in the multi-temperature plasma, 1974a (preprint).
Karpman, V.I., Ju K. Alekhin, N.D. Borisov & N.A. Rjabova, Electrostatic electron- cyclotron waves in the plasma with a loss cone, 1974b (preprint).
Kennel, C.F. & H.E. Petscek, Limit on stably trapped particle fluxes, J. Geophys. Res. 71, 1 (1966).
Kennel, C.F., F.L. Scarf, R.W. Fredricks, J.H. McGehee & F.V. Coroniti, VLF electric field observations in the magnetosphere, J. Geophys. Res. 75, 61136 (1970).
Lyons, R.L., Electron diffusion driven by magnetospheric electrostatic waves, J. Geophys. Res. 79, 575 (1974).
Sagdeev, R.Z. & V.D. Shafranov, On the instability of a plasma with an anisotropic distribution of velocities in a magnetic field, Soviet Physics 12 (1), 130-132 (1961), JETP, English TransÃ.
Scarf, F.L., R.W. Fredricks, C.F. Kennel & F.V. Coroniti, Satellite studies of magnetospheric substorms on August 15, 1968. OGO-5 plasma wave observations, J. Geophys. Res. 78, 3119 (1973).
Young, T.S., J.D. Callen & J.E. McCure, High frequency electrostatic waves in the magnetosphere, J. Geophys. Res. 78, 1082 (1973).
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© 1976 D. Reidel Publishing Company, Dordrecht, Holland
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Ashour-Abdalla, M., Kennel, C.F. (1976). VLF Electrostatic Waves in the Magnetospheres of the Earth and Jupiter. In: Knott, K., Battrick, B. (eds) The Scientific Satellite Programme during the International Magnetospheric Study. Astrophysics and Space Science Library, vol 57. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1892-0_20
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DOI: https://doi.org/10.1007/978-94-010-1892-0_20
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