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| Titel |
Effect of interchange instability on magnetic reconnection |
| VerfasserIn |
W. Lyatsky, M. L. Goldstein |
| 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 ; 20, no. 3 ; Nr. 20, no. 3 (2013-06-13), S.365-377 |
| Datensatznummer |
250018974
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| Publikation (Nr.) |
 copernicus.org/npg-20-365-2013.pdf |
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| Zusammenfassung |
| We present here the results of a study of interacting magnetic fields that
involves a force normal to the reconnection layer. In the presence of such
force, the reconnection layer becomes unstable to interchange disturbances.
The interchange instability results in formation of tongues of heated plasma
that leaves the reconnection layer through its wide surface rather than
through its narrow ends, as is the case in traditional magnetic reconnection
models. This plasma flow out of the reconnection layer facilitates the
removal of plasma from the layer and leads to fast reconnection. The proposed
mechanism provides fast reconnection of interacting magnetic fields and does
not depend on the thickness of the reconnection layer. This instability
explains the strong turbulence and bidirectional streaming of plasma that is
directed toward and away from the reconnection layer that is observed
frequently above reconnection layers. The force normal to the reconnection
layer also accelerates the removal of plasma islands appearing in the
reconnection layer during turbulent reconnection. In the presence of this
force normal to the reconnection layer, these islands are removed from the
reconnection layer by the "buoyancy force", as happens in the case of
interchange instability that arises due to the polarization electric field
generated at the boundaries of the islands. |
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