Physics
Scientific paper
Mar 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jatp...39..333h&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 39, Mar. 1977, p. 333-345.
Physics
1
Atmospheric Ionization, D Region, Adiabatic Conditions, Fourier Transformation, Ionospheric Electron Density, Laplace Transformation, Particle Density (Concentration), Thermodynamic Equilibrium
Scientific paper
Compressional motions of the ionized species in a field-free, multiconstituent, weakly ionized plasma are investigated using the continuum momentum and continuity equations. The effects of particle inertia, pressure, collisions, and the electric field are included. Analytic expressions are derived for the particle density perturbations for an arbitrary number of ionic species. This theory is then applied to the D-region. The dispersion relations are solved at several altitudes for length scales much smaller than, equal to, and much greater than the electron Debye length, and phenomena associated with the roots of the polynomial dispersion relation are studied. Thermal equilibration time scales are estimated for the charged species, and the validity of isothermal and adiabatic closures for the particle pressures is thereby determined. Applications and extensions of the formulation are discussed.
Bowhill S. A.
Hill Richard J.
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