Model of electron and ion distributions in the plasma sheet boundary layer

Details Model of electron and ion distributions in the plasma sheet boundary layer Model of electron and ion distributions in the plasma sheet boundary layer

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9620999o&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Dec. 1, 1991, p. 20,999-21,011. Research sponsored by DOE.

Physics

77

Boundary Layers, Current Sheets, Electron Distribution, Geomagnetic Tail, Ion Distribution, Plasma Layers, Space Plasmas, Electron Beams, Ion Beams, Magnetic Field Reconnection, Magnetic Moments, Spatial Distribution, Two Dimensional Models

Scientific paper

A 2D model for the plasma distributions in the plasma sheet boundary layer is presented. The model is based on quasi-steady reconnection occurring in the distant magnetotail and is able to reproduce all observed features in the electron and ion distribution functions. The model's essential features are the finite time-of-flight effect, energy conservation, and conservation of the magnetic moment as the particles stream from the low magnetic field region near the central plasma sheet to the higher field region in the boundary layer. The model can be used to estimate the central plasma sheet density, temperature, and bulk flow speed as functions of position earthward of a reconnection site from observed plasma sheet boundary layer distributions. These plasma distributions obtained form the model may be useful in determining the stability of the boundary layer plasma to various electrostatic and electromagnetic modes.

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