Several non invasive techniques are applied in the field of preservation and restoration of artefacts which exploit the peculiar properties of the interaction of X-rays with matter. Among these, radiography and tomography are well established while the K-edge method for the analysis of the distribution of pigments on canvas is being proposed. In the context of the neu_ART project, an imaging laboratory has been developed at the Centro Conservazione e Restauro “La Venaria Reale”, in collaboration with the National Institute for Nuclear Physics (INFN) and the Physics Department of the University of Torino. It comprises a X-ray apparatus for radiography and computed tomography and a scanning system for elemental inspection on canvas. A very versatile system was assembled and exploited for 2D and 3D studies of large dimensions objects. A quasi-monochromatic X-ray beam with a microstrip silicon detector moved together on a scanning system are the key elements of the innovative K-edge method. The monochromatization is achieved by exploiting the Bragg interference of polychromatic X-rays in a mosaic crystal whose tilt angle respect to the X-ray source can be set in order to select the suitable beam energy for the chemical element of interest. A detailed description of the facility and some case studies will be presented.
The new X-ray imaging facility at the Centro Conservazione e Restauro “La Venaria Reale
MILA, Giorgia;LO GIUDICE, Alessandro;RE, ALESSANDRO;SACCHI, Roberto
2014-01-01
Abstract
Several non invasive techniques are applied in the field of preservation and restoration of artefacts which exploit the peculiar properties of the interaction of X-rays with matter. Among these, radiography and tomography are well established while the K-edge method for the analysis of the distribution of pigments on canvas is being proposed. In the context of the neu_ART project, an imaging laboratory has been developed at the Centro Conservazione e Restauro “La Venaria Reale”, in collaboration with the National Institute for Nuclear Physics (INFN) and the Physics Department of the University of Torino. It comprises a X-ray apparatus for radiography and computed tomography and a scanning system for elemental inspection on canvas. A very versatile system was assembled and exploited for 2D and 3D studies of large dimensions objects. A quasi-monochromatic X-ray beam with a microstrip silicon detector moved together on a scanning system are the key elements of the innovative K-edge method. The monochromatization is achieved by exploiting the Bragg interference of polychromatic X-rays in a mosaic crystal whose tilt angle respect to the X-ray source can be set in order to select the suitable beam energy for the chemical element of interest. A detailed description of the facility and some case studies will be presented.File | Dimensione | Formato | |
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2014 Mila et al - Proceedings Art'14 [IND86].pdf
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