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| Titel |
Testing electric field models using ring current ion energy spectra from the Equator-S ion composition (ESIC) instrument |
| VerfasserIn |
L. M. Kistler, B. Klecker, V. K. Jordanova, E. Möbius, M. A. Popecki, D. Patel, J. A. Sauvaud, H. Rème, A. M. Lellis, A. Korth, M. McCarthy, R. Cerulli, M. B. Bavassano Cattaneo, L. Eliasson, C. W. Carlson, G. K. Parks, G. Paschmann, W. Baumjohann, G. Haerendel |
| 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 ; 17, no. 12 ; Nr. 17, no. 12, S.1611-1621 |
| Datensatznummer |
250013853
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| Publikation (Nr.) |
 copernicus.org/angeo-17-1611-1999.pdf |
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| Zusammenfassung |
During the main and early recovery phase of a
geomagnetic storm on February 18, 1998, the Equator-S ion composition instrument
(ESIC) observed spectral features which typically represent the differences in
loss along the drift path in the energy range (5–15 keV/e) where the drift
changes from being E × B dominated to being gradient and
curvature drift dominated. We compare the expected energy spectra modeled using
a Volland-Stern electric field and a Weimer electric field, assuming charge
exchange along the drift path, with the observed energy spectra for H+
and O+. We find that using the Weimer electric field gives much
better agreement with the spectral features, and with the observed losses.
Neither model, however, accurately predicts the energies of the observed minima.
Key words. Magnetospheric physics (energetic
particles trapped; plasma convection; storms and substorms) |
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