Ion-acoustic dressed solitons in plasmas with positrons and nonthermal electrons

Propagation of an ion-acoustic soliton in a plasma consisting of ion, positron and nonthermal electron is considered the reductive perturbation. The well known reductive perturbation method (RPM) has been used to derive the KdV equation. This exact solution reduce to the dressed soliton solution when mach number (M) is expanded in terms of soliton velocity. Variation of amplitude and width for the KdV soliton, core structure, dressed soliton and exact soliton are graphically represented [Tiwari 2008] to different values of positron concentration and nonthermal electron. (author)