X Ray Imaging

The physics department and INFN sezione di Torino are equipped with a laboratory for digital radiography and tomography. The laboratory is mainly used for the analysis of objects in the field of cultural heritage, but study in other fields are also carried out.

X-ray imaging is now widely used in the Cultural Heritage field because of its non-invasivity and for the high number of information which can be obtained on the inner structure of an object. A new instrument for X-ray radiography and tomography has been developed by the Physics Department of the University of Torino and the INFN (National Institute for Nuclear Physics). It is based on a microfocus X-ray source, Hamamatsu L8121-03 (40-150 kV; 10-500 μA; 5-50 μm spot size ), a rotary stage (used only for tomography) and a linear X-ray TDI camera, Hamamatsu C10650-321 (48 μm pixel size, 12 bit output), moved by a high precision mechanics (about 2.5 m horizontally and 0.8 m vertically).

A frame to fix paintings and larger objects is also available, allowing radiographies on large areas. The possibility to change distances among the analysed object and both the detector and the source makes the instrument very versatile, allowing to analyse both small objects (exploiting a high magnification) and bigger ones (analysing large areas). Moreover many parameters, like X-ray energy, current, integration time and distances, can be optimized in real time, allowing to obtain the best configuration in short time.