Large amplitude double layers in a four component dusty plasma with non-thermal ions

Dust acoustic double layers are studied in a four component dusty plasma. Positively and negatively charged mobile dust and Boltzmann distributed electrons are considered. The ion distribution is taken as nonthermal. The existence of compressive and rarefractive double layers is studied by pseudopotential approach. The effect of non-thermal ions on small amplitude and arbitrary amplitude double layers are also studied.Large amplitude double layers in a four component dusty plasma with non-thermal ions Gurudas Mandal1, Kaushik Roy2 and Prasanta Chatterjee2* 1Department of APCE, East West University, Mohakhali, Dhaka Bangladesh 2Department of Mathematics, Siksha Bhavana, Visva Bharati, Santiniketan-731 235, West Bengal, India E-mail : [email protected] of APCE, East West University, Mohakhali, Dhaka Bangladesh 2Department of Mathematics, Siksha Bhavana, Visva Bharati, Santiniketan-731 235, West Bengal, Indi

Shock Waves in a Dusty Plasma with Positive and Negative Dust where Ions are Non-Thermal

A four-component dusty plasma consisting of electrons, ions, and negatively as well as positively charged dust grains has been considered. Shock waves may exist in such a four-component dusty plasma. The basic characteristics of shock waves have been theoretically investigated by employing reductive perturbation technique (RPT). It is found that negative as well as positive shock potentials are present in such dusty plasma. The present results may be useful for understanding the existence of nonlinear potential structures that are observed in different regions of space (viz. cometary tails, lower and upper mesosphere, Jupiter's magnetosphere, interstellar media, etc)