Physics
Scientific paper
Mar 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987p%26ss...35..353s&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 35, March 1987, p. 353-395.
Physics
35
Atmospheric Electricity, Auroral Zones, Space Environment Simulation, Space Plasmas, Electric Field Strength, Electron Beams, Electrons, Ion Cyclotron Radiation, Ion Motion, Particle Acceleration, Particle In Cell Technique, Plasma Diagnostics, Velocity Distribution
Scientific paper
Plasma processes driven by current sheets of finite thicknesses in an ambient magnetized plasma are studied using a 2 1/2 dimensional particle-in-cell code, and similarities are found between simulated plasma processes and those observed in the auroral plasma. Current sheets are shown to be bounded by large perpendicular electric fields occurring near their edges above the conducting boundary. Shaped potential structures form when the current sheets are narrow, and when the current sheets are wide, potential structures develop a significant parallel potential drop such that the electrons are accelerated upwards. Downward parallel electric fields of variable strength are noted in the downward current region, and double layer formation is seen in both narrow and wide current sheets. High frequency oscillations near the electron plasma frequency and its harmonic are seen, and low frequency waves are observed.
Schunk Robert W.
Singh Nagendra
Thiemann Heinz
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