Collisional effects in negative ion plasmas in the presence of degenerate electrons

摘要

Ion acoustic solitary wave structures in negative ion plasmas in the presence of degenerate electrons are investigated. The collisions of positive ions, negative ions, and electrons with neutrals are considered. The Damped Korteweg-de Vries (DKdV) equation is derived by using reductive perturbation method. The time dependent solution of DKdV is presented. Different combinations of the negative ion plasmas in the presence of degenerate electrons are considered for numerical analyses. The effects of variations of different plasmas parameters on the propagation characteristics of the damped solitary wave structure are discussed.Published by AIP Publishing.