Collisionless damping of nonlinear dust ion acoustic wave due to dust charge fluctuation.
A dissipation mechanism for the damping of the nonlinear dust ion acoustic wave in a collisionless dusty plasma consisting of nonthermal electrons, ions, and variable charge dust grains has been investigated. It is shown that the collisionless damping due to dust charge fluctuation causes the nonlinear dust ion acoustic wave propagation to be described by the damped Korteweg-de Vries equation. Due to the presence of nonthermal electrons, the dust ion acoustic wave admits both positive and negative potential and it suffers less damping than the dust acoustic wave, which admits only negative potential.
Ghosh
Samiran
S
Centre for Plasma Studies, Faculty of Science, Jadavpur University, Calcutta 7000 032, India. sran@jufs.ernet.in
Chaudhuri
Tushar K
TK
Sarkar
Susmita
S
Khan
Manoranjan
M
Gupta
M R
MR