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| Titel |
Numerical simulation of ion dynamics in the magnetotail magnetic turbulence: On collisionless conductivity |
| VerfasserIn |
A. Greco, P. Veltri, G. Zimbardo, A. L. Taktakishvili, L. M. Zelenyi |
| 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 ; 7, no. 3/4 ; Nr. 7, no. 3/4, S.159-166 |
| Datensatznummer |
250004252
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| Publikation (Nr.) |
 copernicus.org/npg-7-159-2000.pdf |
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| Zusammenfassung |
| The ion dynamics in the distant Earth's
magnetotail is studied in the case that a cross tail electric field and
reconnection parity magnetic turbulence are present in the neutral sheet. A test
particle simulation is performed for the ions, and moments of the ion
distribution function are obtained as a function of the magnetic fluctuation
level, δB/B0, and of the value of the cross tail electric field,
Ey. It is found that magnetic turbulence can split the current
carrying region into a double current sheet, in agreement with inferences from
observations in the distant magnetotail. The problem of ion conductivity is
addressed by varying the value of the cross tail electric field from zero to the
observed one: we find that Ohm's law is not enforced, and that a non local,
system dependent conductivity is necessary to describe the ion response to the
electric field. Also, it appears that the relation between current and electric
field may be nonlinear. |
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