Nonlinear instabilities in a dusty plasma sheath

Author

Shukla, Padma K. ; Stenflo, Lennart ; Morfill, G.M.

Author_Institution

Dept. of Plasma Phys., Umea Univ., Sweden

Volume

29

Issue

2

fYear

2001

fDate

4/1/2001 12:00:00 AM

Firstpage

198

Lastpage

201

Abstract

The nonlinear coupling between large amplitude ion waves and dust-acoustic waves (DAWs), as well as dust-lattice waves (DLWs), in a dusty plasma sheath is considered. By employing a two-fluid approach, we derive a system of coupled equations for the ion waves and the DAWs/DLWs; the latter are nonlinearly driven by the ion wave ponderomotive force. A normal mode analysis of our nonlinearly coupled equations is performed to obtain general dispersion relations that are useful for studying modulational instabilities. The implications to laboratory plasmas are pointed out

Keywords

dispersion relations; dusty plasmas; modulational instability; plasma electrostatic waves; plasma ion acoustic waves; plasma nonlinear processes; plasma sheaths; dispersion relations; dust-acoustic waves; dust-lattice waves; dusty plasma sheath; ion waves; laboratory plasmas; modulational instabilities; nonlinear coupling; nonlinear instabilities; normal mode analysis; two-fluid approach; Coupled mode analysis; Couplings; Dusty plasma; Electrons; Frequency; Nonlinear equations; Plasma density; Plasma sheaths; Plasma temperature; Plasma waves;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.923693

Filename

923693