Dust charge fluctuation effects on dust ion-acoustic waves in dusty electron-positron-ion plasmas. (26th January 2015)

• Record Type: Journal Article
• Authors: Jamshidi, M; Rouhani, M R; Hakimi Pajouh, H
• Is Part Of: Physica scripta. Volume 90:Number 2(2015:Feb.)
• Publication Date: 2015-01-26
• Subjects: dust charge fluctuations -- dust ion-acoustic waves -- kinetic theory; 52.27.Lw; Physics -- Periodicals; 530.05
• DOI: 10.1088/0031-8949/90/2/025604
• Languages: English
• ISSNs: 0031-8949

Abstract

Abstract: In this paper, using the kinetic theory the longitudinal dielectric permittivity in a plasma consisting of electrons, positrons, ions and negatively charged dust grains is obtained, taking into account dust charge fluctuations. It is shown that the dust charge fluctuations can lead to either the damping or growing of dust ion-acoustic waves. We find a critical wave number above which these waves grow. Also, we numerically investigate the critical wave number and the growth rate of these waves for different plasma parameters.