The expansion of a plasma into a vacuum - Basic phenomena and processes and applications to space plasma physics

Details The expansion of a plasma into a vacuum - Basic phenomena and processes and applications to space plasma physics The expansion of a plasma into a vacuum - Basic phenomena and processes and applications to space plasma physics

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983rvgsp..21.1631w&link_type=abstract

Reviews of Geophysics and Space Physics (ISSN 0034-6853), vol. 21, Aug. 1983, p. 1631-1646.

Physics

Space Physics

2

Gas Expansion, Plasma Dynamics, Space Plasmas, Ion Currents, Particle Acceleration, Solar Planetary Interactions, Titan

Scientific paper

In this review attention is called to basic phenomena and physical processes involved in the expansion of a plasma into a vacuum, or the expansion of a plasma into a more tenuous plasma, in particular the fact that upon the expansion, ions are accelerated and reach energies well above their thermal energy. Also, in the process of the expansion a rarefaction wave propagates into the ambient plasma, an ion front moves into the expansion volume, and discontinuities in plasma parameters occur. The physical processes which cause the above phenomena are discussed, and their possible application is suggested for the case of the distribution of ions and electrons (hence plasma potential and electric fields) in the wake region behind artificial and natural obstacles moving supersonically in a rarefied space plasma. To illustrate this, some in situ results are reexamined. Directions for future work in this area via the utilization of the Space Shuttle and laboratory work are also mentioned.

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