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| Titel |
Weibel instability in a plasma with nonzero external magnetic field |
| VerfasserIn |
O. A. Pokhotelov, M. A. Balikhin |
| 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 ; 30, no. 7 ; Nr. 30, no. 7 (2012-07-13), S.1051-1054 |
| Datensatznummer |
250017243
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| Publikation (Nr.) |
 copernicus.org/angeo-30-1051-2012.pdf |
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| Zusammenfassung |
| The theory of the Weibel instability is generalized
for the case of a plasma immersed in a nonzero external magnetic field. It is
shown that the presence of this external field modifies the dispersion relation for
this mode which now possesses a nonzero frequency. The explicit expression for
the real and imaginary parts of the frequency is then calculated. It turns
out that the linear growth rate remains unchanged, whereas the frequency
becomes nonzero due to the finite value of the electron cyclotron frequency.
The frequency of the Weibel mode is found to be proportional to the electron
temperature anisotropy. The formal similarity of the Weibel and
drift-mirror instabilities is outlined. |
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