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| Titel |
Dispersion relation of electromagnetic ion cyclotron waves using Cluster observations |
| VerfasserIn |
I. P. Pakhotin, S. N. Walker, Y. Y. Shprits, M. A. Balikhin |
| 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 ; 31, no. 8 ; Nr. 31, no. 8 (2013-08-26), S.1437-1446 |
| Datensatznummer |
250086096
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| Publikation (Nr.) |
 copernicus.org/angeo-31-1437-2013.pdf |
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| Zusammenfassung |
| Multi-point wave observations on Cluster spacecraft are used to
infer the dispersion relation of electromagnetic ion cyclotron (EMIC) waves.
In this study we use a phase differencing method and observations from STAFF
and WHISPER during a well-studied event of 30 March 2002. The phase
differencing method requires the knowledge of the direction of the wave
vector, which was obtained using minimum variance analysis. Wave vector
amplitudes were calculated for a number of frequencies to
infer the dispersion relation experimentally. The obtained dispersion relation is largely
consistent with the cold plasma dispersion relation. The presented method
allows inferring the dispersion relation experimentally. It can be also used
in the future to analyse the hot plasma dispersion relation of waves near the
local gyrofrequency that can occur under high plasma beta conditions. |
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