Physics
Scientific paper
Oct 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13...45h&link_type=abstract
Advances in Space Research, Volume 13, Issue 10, p. 45-54.
Physics
2
Scientific paper
The CRRES mission involved a number of chemical releases in the ionosphere and magnetosphere to study a multitude of scientific phenomena. In this paper two releases are discussed: the G-9 release and the G-10 release. One of the primary purposes of the G-9 release was to study the transverse motion (i.e., `skidding') of plasma across magnetic field lines. Analysis of optical images indicates that the barium cloud `skidded' ~ 9 - 15 km. The simulation study is based upon a 2D electrostatic code which incorporates a time-dependent model of coupling to the background ionosphere. The simulation results indicate the densest portion of the barium cloud `skids' ~ 15 km within the first 3 sec following the release, consistent with observations. The G-10 release was designed to study, in part, the formation and evolution of a diamagnetic cavity, as well as the stability of the barium plasma. The simulation results are obtained from a 2D Hall MHD code and show that (1) the plasma and field structure at time t <= 22 sec, and develop scale sizes ~ 10 - 15 km, and (2) the structuring of the plasma allows `blobs' of plasma to drift across the magnetic field. These results are consistent with optical and in situ magnetometer measurements.
Bernhardt Paul A.
Fedder Joel A.
Huba Joseph D.
Lyon John G.
Mitchell Horace G.
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