Abstract
The effect of ion temperature on the propagation of arbitrary amplitude ion-acoustic solitary waves is studied in an unmagnetized plasma which consists of a positively charged, warm ion fluid and hot electrons obeying a flat-topped distribution. A flat distribution for trapped particles is considered corresponding to the nonlinear interaction between electrons and electrostatic wave potential during its evolution. The basic properties of large amplitude solitary waves are studied by deriving an energy integral equation involving the Sagdeev potential. It is shown that the effects of such electron behavior and ion temperature change the regions of existence of arbitrary amplitude compressive solitary waves. By expanding the Sagdeev potential to include higher order nonlinearities of the electric potential, an exact steady state solution is also obtained, which confirms the possibility of ion-acoustic solitary waves in the small amplitude limit. Furthermore, two asymptotic cases of the stationary solution are found which are related to the contribution of flat-trapped electrons.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call