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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.49 [2011] >
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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