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| Titel |
Electric field scales at quasi-perpendicular shocks |
| VerfasserIn |
S. N. Walker, H. St. C. K. Alleyne, M. A. Balikhin, M. André, T. S. Horbury |
| 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 ; 22, no. 7 ; Nr. 22, no. 7 (2004-07-14), S.2291-2300 |
| Datensatznummer |
250014919
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| Publikation (Nr.) |
 copernicus.org/angeo-22-2291-2004.pdf |
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| Zusammenfassung |
| This paper investigates the short scale structures that are observed in the
electric field during crossings of the quasi-perpendicular bow shock using
data from the Cluster satellites. These structures exhibit large amplitudes,
as high as 70 m Vm-1 and so make a significant contribution to the overall
change in potential at the shock front. It is shown that the scale size of
these short-lived electric field structures is of the order of a few c/ωpe. The relationships between the scale size and the upstream Mach number and
θBn are studied. It is found that the scale size of these
structures decreases with increasing plasma β and as
θBn→90°. The amplitude of the spikes remains
fairly constant with increasing Ma and appears to increase as
θBn→90°. |
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