Cultural Heritage objects; ion beam analysis; fragile materials; automation; 24-hour use

La nouvelle installation d'analyse par faisceaux d'ions pour le Patrimoine culturel

Equipements d'excellence (EQPX)

Equipements d'excellence

Informations générales

Référence projet : 10-EQPX-0022
Etablissement Coordinateur : CNRS Paris B
Région du projet : Île-de-France
Discipline : 6 - SHS

Aide de l'ANR 1 448 990 euros
Investissement couvrant la période de février 2011 à décembre 2019

Résumé de soumission

Since 1988, the Accelerator Grand louvre for Elemental Analysis alias AGLAE has been exclusively dedicated to the study of Cultural Heritage objects in the Louvre premises. Most often, sampling cannot be considered because of the uniqueness of the studied artifacts. The conservation state may also prohibit to work under vacuum. For these reasons, an extracted beamline has been developed especially for Cultural Heritage objects on the AGLAE facility for 25 years. The AGLAE team helps in assessing museums, develops the instrument and actively participate in multi-disciplinary research programs such as the European FP6 Eu-Artech, FP7 CHARISMA and H2020 IPERION-CH programs.

The accelerator produces ions such as protons, deutons and alpha particles with an energy that can go up to 4MeV (ca. 30,000 km/s) for the former and 6MeV (ca. 17,000 km/s) for the latter. The interaction of the particles on a material produces the simultaneous emission of various electromagnetic radiation (X-ray, gamma-ray, visible light). Once monitored and treated, the data give precious information on the elemental composition of the target, including trace elements (less than 0.5%). After the collision with the target, some particles can be backscattered and their energy can be measured, enabling compositional depth profiling. These data give precious information on the provenance of the material, the recipes used by the craftsmen, or clues on making process…

The New AGLAE project aims at automating the beamline in order to extend the AGLAE beam time to nights, allowing analysis 24 hours a day. Objects from collections will be studied by day. Night beam time will be used for series of samples, mock-up samples or acquisitions that need high statistics thus several hour measurements. The conception and implementation of a multi-detector enabling systematic chemical imaging would enable to study fragile materials such as paintings. The New AGLAE facility should be operational in July 2017.

L'auteur de ce résumé est le coordinateur du projet, qui est responsable du contenu de ce résumé. L'ANR décline par conséquent toute responsabilité quant à son contenu.

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