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IJPAP Vol.49(03) [March 2011] >


Title: Arbitrary amplitude dust ion acoustic solitary waves and double layers in a kappa distributed electron plasmas
Authors: Gogoi, Runmoni
Roychoudhury, Rajkumar
Khan, Manoranjan
Keywords: Solitary wave
Double layers
Sagdeev potential
κ-Distribution
Issue Date: Mar-2011
Publisher: NISCAIR-CSIR, India
Abstract: To investigate dust ion-acoustic solitary waves in an unmagnetized plasma, inertial warm ions, and static dust are considered with electrons following the kappa (κ) velocity distribution. Using Sagdeev’s pseudo potential method, an exact analytical expression for the Pseudo potential is derived. The range of parameters for the existence of solitary waves and double layers, using the analytical expression of the Sagdeev potential has been found. It is observed that, depending on the values of the plasma parameters like ion temperature s=Ti/Te, kappa spectral index κ and the value of the dust grain charge Zd ( =nd0/nd0), both rarefactive and compressive solitary waves may exist. Critical values of these parameters, beyond which solitary waves would cease to exist, are obtained for some particular cases. Exact numerical results are obtained for arbitrary amplitude solitons and double layers.
Page(s): 173-179
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.49(03) [March 2011]

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