Physics
Scientific paper
Aug 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.4297h&link_type=abstract
Journal of Geophysical Research, vol. 84, Aug. 1, 1979, p. 4297-4304. NSF-supported research.
Physics
31
Atmospheric Models, Auroral Zones, Computerized Simulation, Particle In Cell Technique, Charged Particles, Electric Fields, Graphs (Charts), Mathematical Models, Particle Acceleration, Thermal Energy
Scientific paper
Some basic properties of plasma double layers are deduced from a particle-in-cell computer simulation and related to parallel electric-field structures above the auroral regions. The simulation results on the processes leading to double-layer formation are examined, particularly in relation to the transient stage and double-layer structure and stability. It is concluded that: (1) a large potential difference applied to a finite-length plasma will be concentrated in a shocklike localized region instead of occurring over the entire length of the system; (2) the initial stage in double-layer formation is dominated by a large-potential pulse propagating in the direction of the induced electrostatic drift; (3) the entire potential is dropped over a specific scale length once the double layer has formed; and (4) this scale length is expected to be of the order of 1 km for a double layer above a discrete auroral arc with a potential of 10 kV and the electric-field vector parallel to the magnetic-field vector.
Hubbard Richard F.
Joyce Geoffrey
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