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Active spectroscopic imaging is based on arrays of broadband, short-response-time detectors observing a scene illuminated by a number of THz sources. Here we present the system design, the fabrication process and the single-pixel test for three detector technologies: GaAs Schottky diodes, GaN transistors, Nb bolometers.
In this paper we propose a novel diagnostic technique to study the biological degradation of the mosaics in the Villa del Casale, Piazza Armerina (Italy). Starting from an analysis of the presence of biological material affecting the mosaics we want to prove the possibility of detecting its presence under the mosaics without removing the tesserae.
A novel non invasive technique and some suitable apparatus for treatment of artworks are introduced. Different phases of any interventions are described, some results are described and discussed. Recent applications on ancient wood artifacts revealed interesting potential future developments for the analysis and complete disinfestations.
This work presents a simple electromagnetic model to deal with the reflection from buried interfaces and to provide the basis of a reconstruction strategy whose data are given in terms of the intensity of the THz signal, which arises from the interference of a reference signal with the one reflected by the probed sample.
Two Free Electron Laser sources have been developed at ENEA-Frascati and are available for a variety of applications: a Compact Free Electron Laser (C-FEL) that provides coherent radiation in the frequency range between 90 and 150 GHz, and a second source, FEL-CATS, which utilizes a peculiar radio-frequency structure to generate coherent emission in the range 0.4 to 0.7 THz without the use of an optical...
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