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| Titel |
Simulation of mode conversion process from upper-hybrid waves to LO-mode waves in the vicinity of the plasmapause |
| VerfasserIn |
M. J. Kalaee, Y. Katoh, A. Kumamoto, T. Ono, Y. Nishimura |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 28, no. 6 ; Nr. 28, no. 6 (2010-06-14), S.1289-1297 |
| Datensatznummer |
250016844
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| Publikation (Nr.) |
 copernicus.org/angeo-28-1289-2010.pdf |
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| Zusammenfassung |
| In order to clarify the role of the mode conversion process in the
generation mechanism of LO-mode waves in the equatorial region of the
plasmasphere, we have investigated the linear mode conversion process among
upper-hybrid-resonance (UHR)-mode, Z-mode and LO-mode waves by a numerical
simulation solving Maxwell's equations and the equation of motion of a cold
electron fluid. The wave coupling process occurring in the cold magnetized
plasma are examined in detail. In order to give a realistic initial plasma
condition in the numerical experiments, we use initial parameters inferred
from observation data obtained around the generation region of LO-mode waves
obtained by the Akebono satellite. A density gradient is estimated from the
observed UHR frequency, and wave normal angles are estimated from the
dispersion relation of cold plasma by comparing observed wave electric
fields. Then, we perform numerical experiments of mode conversion processes
using the density gradient of background plasma and the wave normal angle of
incident upper hybrid mode waves determined from the observation results. We
found that the characteristics of reproduced LO-mode waves in each simulation
run are consistent with observations. |
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