Focusing and interference of whistler-mode waves in a spatially varying magnetic field

Details Focusing and interference of whistler-mode waves in a spatially varying magnetic field Focusing and interference of whistler-mode waves in a spatially varying magnetic field

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978p%26ss...26..595l&link_type=abstract

Planetary and Space Science, vol. 26, June 1978, p. 595-604.

Physics

3

Electromagnetic Interference, Focusing, Geomagnetism, Magnetic Variations, Whistlers, Dawn Chorus, Gyrofrequency, Lines Of Force, Ray Tracing, Very Low Frequencies

Scientific paper

An analytic investigation is made of rays from a source in a magneto-ionic medium for which the magnetic field H and the electron density vary in a Cartesian co-ordinate system Oxyz, with x alone. The case H sub Z = 0 is considered in some detail. It is shown that rays in the xy-plane may be focused, and that interference can occur. The geomagnetic field is then represented by a model for which H sub y is proportional to x, and the magnetic field lines are parabolas. Observations and theories of magnetospheric chorus, in particular of the gap near one-half the equatorial electron gyrofrequency, are discussed in relation to this model.

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