FAST and Cluster observations of the cold, dense plasma sheet.

Details FAST and Cluster observations of the cold, dense plasma sheet. FAST and Cluster observations of the cold, dense plasma sheet.

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm13b1209m&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SM13B-1209

Physics

7843 Numerical Simulation Studies, 2724 Magnetopause, Cusp, And Boundary Layers, 2740 Magnetospheric Configuration And Dynamics, 2764 Plasma Sheet, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

The FAST satellite data set has been examined to determine the morphology and formation of a cold, dense plasma sheet (CDPS). Data were examined where the IMF was steady for at least 6 hours (several orbits), where the IMF was northward, and where the FAST orbit was either dawn-dusk or noon-midnight. Several features are observed. Ion spectra in the CDPS often show structure indicating bounce-drift effects similar to that observed at lower latitudes. Although a VDIS signature of lobe reconnection can be observed on the poleward edge of the cusp during some CDPS observations, the VDIS signature often overlaps a higher energy component on the equatorward side, or forms a bowl-shaped signature. On dawn-dusk orbits, the CDPS can be observed to extend to the highest latitudes, although typically some open field lines remain. These data are also compared to several encounters with a CDPS by Cluster. Some of the Cluster events indicate an ionospheric source. Therefore a CDPS may not be just a product of solar wind plasma injections, but may also result from ionospheric outflows.

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