Quasipotential analysis for deriving the multidimensional Sagdeev potential equation in multicomponent plasma

The exact multidimensional Sagdeev potential is derived in a multicomponent plasma consisting of negative ions wherein a fraction of electrons is trap ped in the potential well developed in the plasma. More precisely, the Sagd eev potential equation revisits the results stemming from the Kadomtsev-Pet viashvili (K-P) equation deduceable by applying the reductive perturbation technique in plasma-acoustic wave dynamics. In the study we show that the m ultidimensional Sagdeev potential derived here yields the formation and pro pagation of solitons, as well as double layers in plasma, by using a new ap proach known as the tanh-method to solve out the soliton phenomena. It is s een that different ordering in phi, the electrical potential, yields differ ent solitary wave solutions that agree with earlier observations. (C) 1999 American Institute of Physics. [S1070-664X(99)02906-7].