Anomalous resistivity due to nonlinear lower-hybrid drift waves

The generation of anomalous collision rate and resistivity by lower-hybrid drift waves is investigated. A general expression involving particle density and current perturbations and electromagnetic field fluctuations is used to estimate the effective collision frequency. Results of Vlasov-code simul...

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Veröffentlicht in:Physics of plasmas 2005-06, Vol.12 (6), p.062902-062902-8
Hauptverfasser: Silin, I., Büchner, J., Vaivads, A.
Format: Artikel
Sprache:eng
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Zusammenfassung:The generation of anomalous collision rate and resistivity by lower-hybrid drift waves is investigated. A general expression involving particle density and current perturbations and electromagnetic field fluctuations is used to estimate the effective collision frequency. Results of Vlasov-code simulations and Cluster spacecraft measurements suggest that electrostatic and electromagnetic fluctuations provide approximately equal contributions to the electron collision rate, which is of the order of the lower-hybrid frequency. The anomalous resistivity based on such collision rate could be significant for the large-scale plasma dynamics in Earth’s magnetosphere, such as magnetic reconnection.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.1927096