Green's function for a switched plasma medium and a perturbation technique for the study of wave propagation in a transient plasma with a small rise time
Summary form only given. The main effect of switching a medium (creating a temporal discontinuity in the properties of a medium) is the splitting of the source (incident) wave into new waves whose frequencies are different. Lightning induced effects in the ionosphere cause a temporary enhancement of...
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Published in | IEEE Conference Record - Abstracts. 1996 IEEE International Conference on Plasma Science p. 186 |
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Main Author | |
Format | Conference Proceeding |
Language | English |
Published |
United States
IEEE
1996
Institute of Electrical and Electronics Engineers, Inc., Piscataway, NJ (United States) |
Subjects | |
Online Access | Get full text |
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Summary: | Summary form only given. The main effect of switching a medium (creating a temporal discontinuity in the properties of a medium) is the splitting of the source (incident) wave into new waves whose frequencies are different. Lightning induced effects in the ionosphere cause a temporary enhancement of ionization. Such transient plasmas have a time-varying plasma frequency /spl omega//sub p/(t) with a rise time T/sub r/. If the period t/sub 0/ of a source wave existing before the transient effect begins is much larger than the rise time, the ionization change may be idealized as a sudden switching of the medium. The solution to this initial value problem with a step-change in the electron density profile is known and this profile will be considered as a reference profile. The switching action gives rise to a reflected wave (propagating in the opposite direction to that of the source wave) and a transmitted wave at an upshifted frequency /spl omega//sub 2/=(/spl omega//sub 0//sup 2/+/spl omega//sub p//sup p/). The topic of this paper is the solution of the initial value problem when t/sub 0/ is comparable to the rise time T/sub r/. |
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Bibliography: | CONF-960634- |
ISBN: | 9780780333222 0780333225 |
ISSN: | 0730-9244 2576-7208 |
DOI: | 10.1109/PLASMA.1996.550824 |