Dynamical features and electric field strengths of double layers driven by currents

Details Dynamical features and electric field strengths of double layers driven by currents Dynamical features and electric field strengths of double layers driven by currents

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.5173s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, June 1, 1985, p. 5173-5186. Research supported by the Alexander von H

Physics

12

Atmospheric Stratification, Auroral Zones, Electric Field Strength, Plasma Layers, Space Plasmas, Current Density, Dynamic Characteristics, Electric Potential, Strata, Velocity Distribution

Scientific paper

In recent years, a number of papers have been concerned with 'ion-acoustic' double layers. In the present investigation, results from numerical simulations are presented to show that the shapes and forms of current-driven double layers evolve dynamically with the fluctuations in the current through the plasma. It is shown that double layers with a potential dip can form even without the excitation of ion-acoustic modes. Double layers in two-and one-half-dimensional simulations are discussed, taking into account the simulation technique, the spatial and temporal features of plasma, and the dynamical behavior of the parallel potential distribution. Attention is also given to double layers in one-dimensional simulations, and electrical field strengths predicted by two-and one-half-dimensional simulations.

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