Physics
Scientific paper
Jan 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975p%26ss...23....1e&link_type=abstract
Planetary and Space Science, vol. 23, Jan. 1975, p. 1-14. Research supported by the Science Research Council.
Physics
7
Current Sheets, Geomagnetic Tail, Magnetopause, Plasma Density, Plasma Temperature, Counterflow, Electromagnetic Noise, Magnetic Effects, Magnetohydrodynamic Flow, Magnetosheath, Plasma Heating, Plasma-Particle Interactions, Solar Wind
Scientific paper
The presence of a weak magnetic field linking through the current sheet leads to plasma containment and counterstreaming, with the consequence that both the plasma temperature and density are increased in the vicinity of the current sheet. The effect of these changes on the relationship between steady bulk parameters is discussed. The finite length of the tail significantly modifies the equilibrium situation in the near-earth tail, for streams mirroring at the earthwards end of field lines lead to a reduction of merging. The finite width of the tail restricts the region of reduced merging rate to a triangular shaped area extending from the dusk magnetopause into the tail. The finite tail width is also important in the more distant tail, where magnetosheath particles which penetrate the magnetopause ends of the current sheet may become major current carriers, especially if Bz is small and northwards. Finally, it is shown that the above factors, together with a non-adiabatic current sheet, are important to our understanding of the temporal behavior of the tail.
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