A new 3D positioner for the analytical mapping of non-flat objects under accelerator beams

Thomas Calligaro (1, 2, 3) , Luis Arean (3) , Claire Pacheco (1, 3) , Quentin Lemasson (1, 3) , Laurent Pichon (1, 3) , Brice Moignard (1, 3) , Clotilde Boust (1, 2) , Loïc Bertrand (4, 5) , Sebastian Schoeder (5) , Mathieu Thoury (4) , L. Rosta (6) , László Szentmiklósi (6) , Janos Füzi (6) , Zoltan László (6) , Victor Heirich (6)

1 C2RMF - Centre de recherche et de restauration des musées de France
2 IRCP - Institut de Recherche de Chimie Paris
3 new AGLAE - New AGLAE - CNRS/Ministère de la Culture/ENSCP
4 IPANEMA - Institut photonique d'analyse non-destructive européen des matériaux anciens
5 SSOLEIL - Synchrotron SOLEIL
6 BNC-RISP - Budapest Neutron Centre

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.

Keywords: Hexapod; Ion beam imaging; Synchrotron imaging; Neutron imaging; 3D target; 3D positioner

Domains: Materials; Material chemistry; Chemical Sciences; Automatic; Archaeology and Prehistory; Cultural heritage and museology; Art and art history

Thomas Calligaro, Luis Arean, Claire Pacheco, Quentin Lemasson, Laurent Pichon, et al.. A new 3D positioner for the analytical mapping of non-flat objects under accelerator beams. 2019. ⟨hal-02485501⟩