Physics – Plasma Physics
Scientific paper
Oct 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aps..dppmi3002r&link_type=abstract
American Physical Society, 42nd Annual Meeting of the APS Division of Plasma Physics combined with the 10th International Congre
Physics
Plasma Physics
Scientific paper
Plasmas containing fine micron-sized charged dust, referred to as dusty plasmas, occur in a wide variety of cosmic and terrestrial environments. Dust is an ubiquitous component of space and astrophysical plasmas, occurring for example in planetary magnetospheres and rings, comets, the Earth's ionosphere, and interstellar molecular clouds. Dust also occurs in laboratory plasma environments, such as plasma processing devices, `plasma crystal' experiments, and dusty plasma wave experiments. The dust grains can be multiply charged, and are orders of magnitude more massive than the ions. The presence of charged dust in a plasma can both modify the behavior of standard plasma waves and instabilities and lead to the appearance of new low frequency dust waves and instabilities. Dusty plasmas in the laboratory may also exhibit strong coupling (i.e., the electrostatic interaction energy between neighboring grains exceeds their kinetic energy) which can affect wave behavior. In this review, recent work on waves and instabilities in both weakly correlated and strongly correlated dusty plasmas is discussed. This includes instabilities in space dusty plasmas, such as cross-field instabilities in both the ion and dust frequency regimes, with application to space shuttle exhaust plumes and meteor trails. Instabilities in laboratory dusty plasmas are discussed, such as ion-dust streaming instabilities in collisional plasmas, and dust acoustic waves and instabilities in strongly coupled dusty plasmas. Suggestions for anticipated future work are given.
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