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| Titel |
Centrifugal trapping in the magnetotail |
| VerfasserIn |
D. C. Delcourt, R. F. Martin, J. A. Sauvaud, T. E. Moore |
| 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 ; 13, no. 3 ; Nr. 13, no. 3, S.242-246 |
| Datensatznummer |
250011782
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| Publikation (Nr.) |
 copernicus.org/angeo-13-242-1995.pdf |
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| Zusammenfassung |
| Particles leaving the neutral sheet in the
distant magnetotail at times display adiabatic trajectory sequences
characterized by an inflection toward the equator and subsequent mirroring in
its vicinity. We demonstrate that this low-latitude mirroring results primarily
from a centrifugal deceleration due to the fast direction-changing E×B
drift. This effect which we refer to as "centrifugal trapping" appears
both in guiding centre and full particle treatments. It thus does not directly
relate to nonadiabatic motion. However, pitch angle scattering due to
nonadiabatic neutral sheet interaction does play a role in reducing the parallel
speed of the particles. We show that centrifugal trapping is an important
mechanism for the confinement of the slowest (typically below the equatorial E×B
drift speed) plasma sheet populations to the midplane vicinity. |
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