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| Titel |
The nonlinear coupling of electromagnetic ion cyclotron and lower hybrid waves in the ring current region: the magnetic storm 1-7May 1998 |
| VerfasserIn |
G. V. Khazanov, E. N. Krivorutsky, K. V. Gamayunov, L. A. Avanov |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 11, no. 2 ; Nr. 11, no. 2 (2004-04-14), S.229-239 |
| Datensatznummer |
250009135
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| Publikation (Nr.) |
 copernicus.org/npg-11-229-2004.pdf |
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| Zusammenfassung |
| The excitation of lower hybrid waves (LHWs) is a widely discussed mechanism of interaction
between plasma species in space, and is one of the unresolved questions of magnetospheric
multi-ion plasmas. In this paper we present the morphology, dynamics, and level of LHW
activity generated by electromagnetic ion cyclotron (EMIC) waves during the 2-7 May 1998
storm period on the global scale. The LHWs were calculated based on a newly developed
self-consistent model (Khazanov et. al., 2002) that couples the system of two kinetic
equations: one equation describes the ring current (RC) ion dynamic, and another equation
describes the evolution of EMIC waves. It is found that the LHWs are excited by helium ions
due to their mass dependent drift in the electric field of EMIC waves. The level of LHW
activity is calculated assuming that the induced scattering process is the main saturation
mechanism for these waves. The calculated LHWs electric fields are consistent with the
observational data. |
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