Physics
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3515103e&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 15, CiteID L15103
Physics
2
Magnetospheric Physics: Magnetosphere: Inner, Magnetospheric Physics: Plasma Sheet, Magnetospheric Physics: Ring Current, Magnetospheric Physics: Magnetotail, Magnetospheric Physics: Numerical Modeling
Scientific paper
Energy-dispersed H+ structures observed by Equator-S in the sub-keV range in the dawn sector of the ring current region were used to perform the remote sensing of cold ions in the near-earth plasma sheet. A time history of the source distribution function in the nightside plasma sheet was reconstructed by using the phase space mapping method under a time-dependent convection electric field model. We obtained the following major conclusions: (1) A cold H+ component (~10 eV) exists in the near-earth plasma sheet. (2) The cold component is readily distinguished from the main component of the plasma sheet (>~a few keV). (3) The cold component is distributed over a relatively wide area in MLT. (4) Energy-dispersed H+ structures in the inner magnetosphere results from temporal variation of the cold component. Our scheme will be applicable for investigating long-term plasma processes acting on the cold component whose behavior is largely unknown.
Ebihara Yasuhiro
Eliasson Lars
Kistler Lynn M.
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