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Author(s):
Y.-N. Nejoh
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Title:
Dynamics of the Dust Charging on Electrostatic Waves in a Dusty Plasma with Trapped Electrons
Date of publication:
Sep.1997
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Key words:
nonlinear dust charging, the existence of electrostatic nonlinear waves, trapped electrons, the effect of the ion to electron density ratio
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Abstract:
Dynamics of the dust charging and the influence of the ion density and temperature on electrostatic nonlinear waves in a dusty plasma having trapped electrons are investigated by numerical calculation. The nonlinear structure of the dust charging is examined, and it is shown that the characteristics of the dust charge number sensitively depend on the plasma potential, Mach number, trapped electron temperature, ion density and temperature. An increase of the ion temperature decreases the dust charging rate and the propagation speed of ion waves. It turns out that a decrease of the trapped electron temperature increases the charging rate of dust grains. It is found that the existence of ion waves sensitively depends on the ion to electron density ratio. New findings of variable-charge dust grain particles, ion density and temperature in a dusty plasma with trapped electrons are predicted.
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