Physics
Scientific paper
Sep 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.4487w&link_type=abstract
Journal of Geophysical Research, vol. 81, Sept. 1, 1976, p. 4487-4494.
Physics
2
Barium Ion Clouds, Convective Flow, Ion Injection, Plasma Diagnostics, Polar Substorms, Skylab Program, All Sky Photography, Auroral Zones, Current Sheets, Electric Fields, Magnetic Fields, Magnetohydrodynamic Flow, Plasma Spraying
Scientific paper
Two barium-plasma injection experiments were carried out during magnetically active periods in conjunction with the Skylab 3 mission. The high-explosive shaped charges were launched near dawn on November 27 and December 4, 1973, UT. In both cases, the AE index was near 400 gammas, and extensive pulsating auroras covered the sky. The first experiment, Skylab Alpha, occurred in the waning phase of a 1000-gamma substorm, and the second, Skylab Beta, occurred in the expansive phase of an 800-gamma substorm. In both, the convection was generally magnetically eastward, with 100-km-level electric fields near 40 mV/m. However, in the Alpha experiment the observed orientation of the barium flux tube fit theoretical field lines having no parallel current, but the Beta flux-tube orientation indicated a substantial upward parallel sheet current.
Davis Neil T.
Peek H. M.
Stenbaek-Nielsen Hans C.
Wescott Eugene M.
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