Excitation of ion‐acoustic rarefactive solitons in a two‐electron‐temperature plasma

Rarefactive ion‐acoustic solitons have been observed in a two‐electron‐temperature plasma. Some of the characteristics can be interpreted by the solution of the Kortweg–de Vries (K–dV) equation. The Mach number of the solitons is a function of the temperature ratio of hot and cold components.