Mathematics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9510481x&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, July 1, 1990, p. 10481-10493.
Mathematics
5
Plasma-Electromagnetic Interaction, Space Plasmas, Temporal Distribution, Three Dimensional Motion, Very Low Frequencies, Wave Packets, Anisotropic Media, Electromagnetic Wave Transmission, Equations Of Motion, Magnetic Dispersion, Normal Density Functions, Vectors (Mathematics)
Scientific paper
The propagation of a VLF electromagnetic wave packet in a magnetoplasma is studied. The wave packet is constructed by superposing a group of spectrum-weighted characteristic vectors. Accurate to the second order, a set of analytic expressions of the complex amplitude factor and field vectors for a Gaussian packet has been obtained. Based on these expressions, effects of dispersion and anisotropy on the vector property of wave field and the amplitude envelope are simulated. Numerical results show that the polarization of wave fields is varying when the packet moves and somewhat deviates from exact circular polarization in a plane transverse to the carrier wave vector. The rotation of the ellipsoidal pulse tends toward a stable direction after a propagation of about 250 periods.
Xu Jin-Shi
Yeh K. C.
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