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[1] The decomposition of the time reversal operator (D.O.R.T.) method allows detection and localization of point-like scatterers through a very simple and robust process. Here, with the aim of applying this method to the detection and the localization of buried objects, we focus on the influence of the restriction of the measurements to a line of receivers. The finite size of the objects is also taken into account, as well as losses in the embedding medium. A simple behavior of the time reversal operator is exhibited, almost independent of the polarization, which permits one to detect scatterers in the resonance domain, with very low ambiguity. Experimental data obtained in an anechoïc chamber confirm our theoretical predictions.

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This paper deals with the reconstruction of the boundary and the permittivity of homogeneous objects from synthetic data. The method is based on a rigorous integral method and a conjugate gradient algorithm requiring the solution of only two direct problems at each step. To model some noise resulting from the inhomogeneity of the background, this object is surrounded by a set of point-like scatterers, arbitrarily distributed between the two parallel lines of measurement. Since convergence of the algorithm strongly depends on the initial guess, a method to detect a target in a random medium has been adapted. Statistical numerical results for reconstruction in a crosswell configuration are also presented.

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Abstract-A particle detection chain based on CMOS-SOI VCO circuit is presented. The solution is used for the recognition and the tracking of a given particle at circuit level. TCAD simulation of the detector has been performed on a 3x3 matrix of diodes based detector for particles recognition and tracking. The current response of the detector has been used for a case study in order to determine the ability of the chain to recognize an alpha particle crossing a 3x3 detection cell. The detection limit of the proposed solution is investigated and discussed in this paper.

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