Physics – Plasma Physics
Scientific paper
Mar 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21..413u&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 6, p. 413-416
Physics
Plasma Physics
6
E Region, Electrodes, Electrodynamics, Plasma Currents, Plasmas (Physics), Whistlers, Electric Current, Hall Effect, Magnetohydrodynamics, Plasma Physics
Scientific paper
Magnetic probe measurements in three dimensions (greater than 15,000 positions) and time in a large laboratory plasma (n(sub e) greater than or equal to 10(exp 11)/cc, kTe greater than or equal to 1eV, B(sub 0) = 20 G, 1 m diam. x 2.5 m length) reveal the plasma currents J = del(vector differential operator) x B/mu(sub 0) excited by a pulsed (delta-t = 100 ns), stationary, tethered pair of electrodes (approximately equals 1 cm diam., 20 cm spacing perpendicular to B(sub 0)). The plasma currents for a moving, dc-current carrying electrodynamic tether are obtained by a superposition of delayed pulses emitted at successively displaced tether positions. The transient plasma currents are carried by low-frequency whistlers instead of Alfven waves and form a 3D wing structure but no long phantom loop due to cross-field Hall current shunting.
Rousculp C. L.
Stenzel R. L.
Urrutia J. M.
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