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| Titel |
Isotropy restoration toward high-beta space plasmas |
| VerfasserIn |
H. Comişel, Y. Narita, U. Motschmann |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2198-5634
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics Discussions ; 1, no. 2 ; Nr. 1, no. 2 (2014-08-12), S.1313-1330 |
| Datensatznummer |
250115119
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| Publikation (Nr.) |
 copernicus.org/npgd-1-1313-2014.pdf |
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| Zusammenfassung |
| Wavevector anisotropy of ion-scale plasma turbulence is studied at
various values of beta. Two complementary methods are used. One is
multi-point measurements of magnetic field in the near-Earth solar
wind as provided by the Cluster spacecraft mission, and the other is
hybrid numerical simulation of two-dimensional plasma turbulence. The
both methods provide evidence of wavevector anisotropy as a function
of beta such that isotropy is gradually restored toward higher values
of beta. Furthermore, the numerical simulation study demonstrates the
existence of scaling law between plasma beta and wavevector
anisotropy. This fact can be used to construct a diagnostic tool to
determine or to constrain plasma beta using multi-point magnetic field
measurements in space. |
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