Nonlinear acoustic waves in nonthermal plasmas with negative and positive dust
- Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281, B-9000 Gent (Belgium) and School of Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000 (South Africa)
Using a Sagdeev pseudopotential formalism where nonlinear structures are stationary in a co-moving frame, large dust-acoustic solitary waves and double layers have been studied in plasmas with negative and positive cold dust, in the presence of nonthermal electrons and ions. This has been done in a systematic way, to delimit the compositional parameter space in which such modes can be found. The existence domain of negative/positive solitary waves is limited by infinite compression of the negative/positive dust or by the occurrence of negative/positive double layers. These double layers require a sufficient nonthermality of the electrons/ions and the presence of enough positive/negative dust. There are parameter ranges where both negative and positive solitary structures coexist, sometimes both of the solitary wave type, sometimes one a solitary wave and the other a double layer. Typical Sagdeev pseudopotentials and solitary wave profiles have been presented.
- OSTI ID:
- 21272480
- Journal Information:
- Physics of Plasmas, Vol. 16, Issue 1; Other Information: DOI: 10.1063/1.3059411; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nonthermal effects on existence domains for dust-acoustic solitary structures in plasmas with two-temperature ions
Large amplitude dust-acoustic solitary waves and double layers in nonthermal plasmas