Mathematics – Logic
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1242..312l&link_type=abstract
PLASMAS IN THE LABORATORY AND THE UNIVERSE: Interactions, Patterns, and Turbulence. AIP Conference Proceedings, Volume 1242, pp
Mathematics
Logic
Plasma Density, Acoustic Wave Effects, Landau Levels, Plasma Kinetic Equations, Acoustical Measurement Methods In Biological Systems And Media, Landau Levels
Scientific paper
Self-excited dust density waves (DDWs) are studied in a striped electrode device. In addition to the usual perpendicularly (with respect to the electrode) propagating DDWs, which have been frequently observed in dusty plasma experiments on the ground, a low-frequency oblique mode is also observed. This low-frequency oblique DDW has a frequency much lower than the dust plasma frequency and its spontaneous excitation is observed even with a very low dust density. It is found that the low-frequency oblique mode can exist either separately or together with the usual perpendicular mode. In the latter case, a new mode arises as a result of the interactions between the perpendicular and the oblique modes. The experiments show that these three modes satisfy the wave coupling conditions in both the frequencies and the wave-vectors.
Hou Lujing
Jiang Ke
Li Yang-Fang
Morfill Gregor E.
Thomas Hubertus M.
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