Propagation of ion-acoustic solitons in a non-quiescent plasma

The propagation of an ion-acoustic soliton from a quiescent plasma region into a localized non-quiescent region ( Delta n/n mod soliton approximately= Delta /n mod noise) is experimentally examined. Several of the soliton properties are preserved although the soliton undergoes an enhanced damping as it propagates in the noisy plasma.