Characteristics of ion acoustic modified Korteweg de Vries (KdV) solitons in multicomponent plasma with negative ions

Propagation characteristics of ion acoustic solitons in multicomponent plasma with negative ions have been investigated experimentally in a new double plasma device. At a critical concentration of negative ions rc, simultaneous evolution of compressive/rarefactive solitons (modified KdV solitons) from an initial compressive/rarefactive density perturbation has been observed. The Mach velocity and width of the solitons are measured and compared with the solutions of the modified KdV equation.