Effect of non-thermal electrons and warm negative ions on ion-acoustic solitary waves in multi-component drifting plasma

488-493Using the Sagdeev’s pseudopotential approach, effects of non-thermal electrons and warm negative ions on the conditions for existence and structure of first and second order ion-acoustic solitary waves have been investigated in a multi-component drifting plasma. It is shown that there exists a critical concentration of negative ions which decides the existence and nature of the ion-acoustic solitary waves. It is found that the non-thermal electrons, the concentration of negative ions and the temperature of negative ions have significant contributions towards the excitation and structure of the ion-acoustic solitary waves. The plasma under consideration can support the formation of compressive, rarefactive as well as W-type solitons with certain restricted values of plasma parameters. The results are important in the context of ionospheric and magnetospheric plasmas