Computer Science – Sound
Scientific paper
Aug 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998r%26qe...41..661s&link_type=abstract
Radiophys. Quantum Electron., Vol. 41, No. 8, p. 661 - 664
Computer Science
Sound
Shock Waves: Plasma, Shock Waves: Meteors, Shock Waves: Earth Ionosphere
Scientific paper
The author studies the dissipation phenomena in the front of the plasma "precursor" of a shock wave in a weakly ionized plasma without allowance for the influence of the magnetic field. Possible energy dissipation mechanisms are discussed for the ions reflected from the potential barrier. The potential "jump" at the precursor front is due to ion sound dispersion and has a spatial scale of the order of the Debye radius D. The relaxation path of the momentum of reflected ions is estimated in the case of their scattering from electrons, which turned out to be much greater than D and much smaller than the electron free path. It is assumed that gas ionization and fluorescence results from the essentially nonequilibrium formation of epithermal electrons and their fast relaxation. A similar process in the decaying plasma gives rise to enhanced induced radiation. The study is applied to the passage of a meteor in the E-region.
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