Author(s)

S. K. Anguma¹, I. Habumugisha^2,3, L. Nazziwa^4,5, E. Jurua⁵, N. Noreen⁶

¹Department of Physics, Muni University, Arua, Uganda.
²Department of Physics, Kabale University, Kabale, Uganda.
³Department of Physics, Islamic University in Uganda, Mbale, Uganda.
⁴Department of Physics, Bishop Stuat University, Kakoba, Uganda.
⁵Department of Physics, Mbarara University of Science and Technology, Mbarara, Uganda.
⁶Department of Physics, Forman Christian College (Chartered University), Lahore, Pakistan.

Ion-acoustic solitary (IAS) waves in electron-positron-ion (e-p-i) plasma have been of interest to many researchers probably due to their relevance in understanding the Universe. However, the study of non-linear ion-acoustic waves in e-p-i plasma with non-thermal electrons has not been adequately studied. A theoretical investigation on non-linear IAS waves in e-p-i plasma comprising of warm inertial adiabatic fluid ions and electrons that are kappa distributed, and Boltzman distributed positron is presented here using the Sagdeev potential technique. It was found that existence domains of finite amplitude IAS waves were confined within the limits of minimum and maximum Mach numbers with varying k values. For lower values of k, the amplitude of the solitary electrostatic potential structures increased as the width decreased, while for high values, the potential amplitude decreased as the width of the solitary structure increased.

Non-Thermal Electrons, Ion-Acoustic Solitary Waves, Electron-Positron-Ion Plasmas

Anguma, S. , Habumugisha, I. , Nazziwa, L. , Jurua, E. and Noreen, N. (2017) Non-Linear Ion-Acoustic Solitary Waves in Electron-Positron-Ion Plasma with Non-Thermal Electrons. Journal of Modern Physics, 8, 892-902. doi: 10.4236/jmp.2017.86055.