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Your search keyword '"Sebastian Schöder"' showing total 2 results
Start Over Author "Sebastian Schöder" Topic [chim] chemical sciences
2 results on '"Sebastian Schöder"'

1. Short- and long-term effect of radiation damage in cotton paper

Author

Anne-Laurence Dupont, Alice Gimat, Sebastian Schöder, Mathieu Thoury, Sabrina Paris-Lacombe, Centre de Recherche sur la Conservation (CRC ), Muséum national d'Histoire naturelle (MNHN)-Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche pour la Conservation des Collections (CRCC), Muséum national d'Histoire naturelle (MNHN)-Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Dupont, Anne-Laurence, and Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin BP 48, 91192 Gif-sur-Yvette Cedex, France.

Subjects
[SHS.MUSEO] Humanities and Social Sciences/Cultural heritage and museology, [CHIM] Chemical Sciences, [CHIM]Chemical Sciences, [SHS.MUSEO]Humanities and Social Sciences/Cultural heritage and museology
Abstract

International audience; The analysis of cultural heritage artefacts with ionizing radiation has rapidly increased in popularity over the last decades - in particular at synchrotron sources - leading to many fascinating new discoveries. However, the damage inflicted to the materials under study during the irradiation is still largely unknown. Organic samples, such as paper, are especially vulnerable to degradation by X-rays. In this work we quantify the radiation damage on a molecular level and show that the chemical reactions triggered promote cellulose degradation and continueto alter the material for several months after the irradiation took place.

Published
2021

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

Author

Thomas Calligaro, Luis Arean, Claire Pacheco, Quentin Lemasson, Laurent Pichon, Brice Moignard, Clotilde Boust, Loïc Bertrand, Sebastian Schöder, Mathieu Thoury, Rosta, L., László Szentmiklósi, Janos Füzi, Zoltan László, Victor Heirich, Centre de recherche et de restauration des musées de France (C2RMF), Centre National de la Recherche Scientifique (CNRS)-Ministère de la Culture et de la Communication (MCC), Institut de Recherche de Chimie Paris (IRCP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Ministère de la Culture (MC), New AGLAE - CNRS/Ministère de la Culture/ENSCP (new AGLAE), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut photonique d'analyse non-destructive européen des matériaux anciens (IPANEMA), Muséum national d'Histoire naturelle (MNHN)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Ministère de la Culture (MC), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Budapest Neutron Centre (BNC-RISP), Janos Bolyai Research Fellowship, Hungarian Academy of Sciences, Project No. 124068, National Research, Development and Innovation Fund of Hungary, European Project: 654028,H2020 Pilier Excellent Science,H2020-INFRAIA-2014-2015,IPERION CH(2015), Zelverte, Marine, Integrated Platform for the European Research Infrastructure ON Cultural Heritage - IPERION CH - - H2020 Pilier Excellent Science2015-05-01 - 2019-04-30 - 654028 - VALID, Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS), Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Ministère de la Culture (MC)

Subjects
[CHIM.MATE] Chemical Sciences/Material chemistry, [SHS.ARCHEO] Humanities and Social Sciences/Archaeology and Prehistory, Hexapod, [SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory, Ion beam imaging, [CHIM.MATE]Chemical Sciences/Material chemistry, [SPI.MAT] Engineering Sciences [physics]/Materials, [SHS.ART]Humanities and Social Sciences/Art and art history, 3D positioner, [SHS.MUSEO]Humanities and Social Sciences/Cultural heritage and museology, [SPI.MAT]Engineering Sciences [physics]/Materials, [SPI.AUTO]Engineering Sciences [physics]/Automatic, [SPI.AUTO] Engineering Sciences [physics]/Automatic, [SHS.MUSEO] Humanities and Social Sciences/Cultural heritage and museology, Neutron imaging, [CHIM] Chemical Sciences, Synchrotron imaging, [CHIM]Chemical Sciences, [SHS.ART] Humanities and Social Sciences/Art and art history, 3D target
Abstract

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.

Published
2019

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