Generalized polarization force acting on charge fluctuating dust grains and its effects on propagation of dust-acoustic waves in a dusty plasma
Department of Physics, Faculty of Science, Arak University, 38156-8 8349, Arak, Iran
2 Department of Physics, Jahangirnagar University, Dhaka-1342, Savar, Bangladesh
* e-mail: email@example.com
Accepted: 8 August 2016
Published online: 19 September 2016
The generalized expression for the polarization force (which mainly arises due to the polarization of plasma ions around the dust grains) acting on charge fluctuating dust grains has been derived. The effect of such generalized polarization force on the propagation of the dust-acoustic waves in such dusty plasma has been also examined. It has been found that both the real and imaginary parts of the dust-acoustic wave frequency are significantly modified by this generalized polarization force. The implications of our results in some real situations of space and laboratory dusty plasmas are briefly discussed.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2016