Critical ionization velocity in a mixture of species

Details Critical ionization velocity in a mixture of species Critical ionization velocity in a mixture of species

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990p%26ss...38.1011l&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 38, Aug. 1990, p. 1011-1016.

Other

2

Critical Velocity, Ion Production Rates, Ionized Gases, Magnetohydrodynamic Waves, Neutral Gases, Space Plasmas, Energy Budgets, Exhaust Gases, Plasma-Particle Interactions, Rocket Exhaust

Scientific paper

Single or multiple critical ionization velocities (CIV) may exist in a mixture of species. A simple plateau tail model of hot electrons is used to examine the critical ionization in a simple model of multiple species of neutral gases with two states only, neutral and ionized. It is found that the existence of single or multiple CIV depends on the neutral-plasma relative velocity and the exent of the hot tail. The values of these velocities are not those of individual species but are governed by an energy budget equation. Some species may serve as mere spectators while others undergo sustained ionization. Parametric domains delineating various behaviors are presented. In space, the existence of multiple CIV in the exhaust of Shuttle engines is unlikely but the single CIV exists at about 11.6 km/s, which is higher than the normal Shuttle speed but attainable in elliptical orbits.

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