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Fully Kinetic Simulation Study of Ion-acoustic Solitons in the Presence of Trapped Electrons by Jenab, S. M. Hosseini; Spanier, F. is a scholarly article available to read on EtoBox.

What is Fully Kinetic Simulation Study of Ion-acoustic Solitons in the Presence of Trapped Electrons about?

The nonlinear fluid theory developed by Schamel suggests a modified KdV equation to describe the temporal evolution of ion acoustic (IA) solitons in the presence of trapped electrons. The validity of this theory is studied here by verifying solitons main characteristic, i.e., stability against successive mutual collisions. We have employed a kinetic model as a more comprehensive theory than the fluid one, and utilized a fully kinetic simulation approach (both ions and electrons are treated based on the Vlasov equation). In the simulation approach, these solitons are excited self-consistently by employing the nonlinear process of IA solitons formation from an initial density perturbation (IDP). The effect of the size of IDPs on the chain formation is proved by the simulation code as a benchmark test. It is shown that the IA solitons, in presence of trapped electrons, can retain their features (both in spatial and velocity direction) after successive mutual collisions. The collisions here include encounters of IA solitons with the same trapping parameter, while differing in size. Kinetic simulation results reveal a complicated behavior during a collision between IA solitons in contra

Author

Jenab, S. M. Hosseini; Spanier, F.

Published

2017

Language

EN