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2019
- handle: 10670/1.d0weez
- hal: hal-02485501
Ce document est lié à :
info:eu-repo/grantAgreement//654028/EU/Integrated Platform for the European Research Infrastructure ON Cultural Heritage/IPERION CH
info:eu-repo/semantics/OpenAccess
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Thomas Calligaro et al., « A new 3D positioner for the analytical mapping of non-flat objects under accelerator beams », HAL-SHS : histoire de l'art, ID : 10670/1.d0weez
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Résumé
We report the development of a 3D positioner for the elemental mapping of non-flat surfaces of heritage targets and its implementation in the external beam of the AGLAE accelerator, a joint research activity of the IPERION-CH European program.The positioner operates in two steps: 1) object surface is digitized using a 3D scanner implemented in the beamline. Surface points are interpolated onto a rectangular grid suitable for beam scanning. 2) Object is scanned under the beam using X/Y/Z stages holding a hexapod robot for rotations. During scanning, target surface is positioned with the Z stage and oriented perpendicular to the beam using hexapod rotations. Areas up to 100 × 100 mm2 with a resolution of 50 µm and 30° curvature of can be mapped on objects of 200 mm and 5 kg max. System operation was tested by recording PIXE maps on the polychrome decoration of a curved porcelain pot.