Scattering in a partially open waveguide: The inverse problem

In this paper we consider an inverse scattering problem which consists in retrieving obstacles a partially embedded waveguide the acoustic case, measurements being located on accessible part of structure. Such can be considered as closed (with finite cross section), while open infinite section). We propose approximate model by using Perfectly Matched Layers order to simplify resolution problem, is based modal formulation Linear Sampling Method. Some numerical results show efficiency our approach. This viewed continuation article [11], was focused forward problem.