A kinetic description of ion-acoustic waves in collisional dusty plasma: Effects of grain charge fluctuations
Abstract
The dispersion relation for ion-acoustic waves in collisional weakly ionized dusty (complex) plasma is formulated with due regard to the grain charge fluctuations. Calculations of the dielectric response function are performed using the Bhatnagar-Gross-Krook kinetic equation. The grain charging currents are described by the Khrapak-Morfill interpolation formula [S. A. Khrapak and G. E. Morfill, Phys. Plasmas 15, 114503 (2008)]. The dependencies of the charging frequencies and effective collision frequencies on dusty plasma parameters are studied in detail. The analysis of the ion-acoustic wave spectrum is presented for the wide range of the ion collisionality for both nonisothermal and isothermal plasmas.
- Publication:
-
Physics of Plasmas
- Pub Date:
- July 2018
- DOI:
- 10.1063/1.5042161
- Bibcode:
- 2018PhPl...25g3706M