Effects of dust charge fluctuations on current-driven dust-ion-acoustic waves.
The effects of fluctuating grain charge on current-driven dust-ion-acoustic modes are investigated in the presence of various physical parameters which are varied in order to describe the behavior of the mode in detail. Variation of the charge clearly influences the ion-acoustic mode by changing of its frequency and growth rate. We report here the existence of a dust charge fluctuation mode in the system, and it is shown that the mode is unstable for a negative charge on the dust per unit volume not exceeding some critical value.
Vranjes
J
J
Center for Plasma Astrophysics, K. U. Leuven, Celestijnenlaan 200B, Leuven 3001, Belgium. jvranjes@yahoo.com
Pandey
B P
BP
Poedts
S
S