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| Titel |
Magnetic field-aligned electrons escaping from plasma density minima in the cusp |
| VerfasserIn |
A. Pedersen, B. Lybekk, S. Haaland, K. Svenes, I. Dandouras, A. N. Fazakerley |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250062147
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| Zusammenfassung |
| On Cluster the plasma density in very tenuous plasmas can be estimated based on spacecraft
potential measurements. This has made it possible to detect plasma density minima of
0.01-0.1 cm-3 in the cusp poleward of the main precipitation of electrons and ions. Electron
data from PEACE show that some of these minima have magnetic field-aligned outflow of
electrons with energies of several hundred eV. Ion data from CIS will be used to
look for possible related ion field-aligned flow. In this study the locations and the
extents of plasma density minima, with electron outflow, will be determined for the
northern and the southern cusp. Information about extent across the magnetic field
can be obtained by using data from all four Cluster satellites, and electric field
data can be used to detect plasma drift and wave activity. Possible connections
to solar wind conditions and magnetosphere disturbance level will be presented |
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