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Popescu H, Perron J, Pilette B, Vacheresse R, Pinty V, Gaudemer R, Sacchi M, Delaunay R, Fortuna F, Medjoubi K, Desjardins K, Luning J, Jaouen N. COMET: a new end-station at SOLEIL for coherent magnetic scattering in transmission. J Synchrotron Radiat 2019; 26:280-290. [PMID: 30655496 DOI: 10.1107/s1600577518016612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 11/22/2018] [Indexed: 06/09/2023]
Abstract
A new instrument named COMET for COherent Magnetic scattering Experiments in Transmission using polarized soft X-rays has been designed and built. This high-vacuum setup is placed at the intermediate focal point of the elastic branch of the SEXTANTS beamline at Synchrotron SOLEIL. The main application is in solid state physics, the instrument being optimized for studying material properties using coherent scattering of soft X-rays with an emphasis on imaging, with chemical selectivity, the magnetic domains of artificially nano-structured materials. The instrument's principal features are presented and illustrated through recently performed experiments.
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Affiliation(s)
- H Popescu
- Synchrotron Soleil, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - J Perron
- Synchrotron Soleil, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - B Pilette
- Sorbonne Université, CNRS, UMR 7614, Laboratoire de Chimie Physique - Matière et Rayonnement, LCP-MR, 75005 Paris, France
| | - R Vacheresse
- Sorbonne Université, CNRS, UMR 7614, Laboratoire de Chimie Physique - Matière et Rayonnement, LCP-MR, 75005 Paris, France
| | - V Pinty
- Synchrotron Soleil, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - R Gaudemer
- Synchrotron Soleil, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - M Sacchi
- Synchrotron Soleil, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - R Delaunay
- Sorbonne Université, CNRS, UMR 7614, Laboratoire de Chimie Physique - Matière et Rayonnement, LCP-MR, 75005 Paris, France
| | - F Fortuna
- CSNSM, Université Paris-Sud, Bâtiment 104, 91405 Orsay, France
| | - K Medjoubi
- Synchrotron Soleil, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - K Desjardins
- Synchrotron Soleil, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - J Luning
- Sorbonne Université, CNRS, UMR 7614, Laboratoire de Chimie Physique - Matière et Rayonnement, LCP-MR, 75005 Paris, France
| | - N Jaouen
- Synchrotron Soleil, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
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Bomme C, Guillemin R, Marin T, Journel L, Marchenko T, Dowek D, Trcera N, Pilette B, Avila A, Ringuenet H, Kushawaha RK, Simon M. Double momentum spectrometer for ion-electron vector correlations in dissociative photoionization. Rev Sci Instrum 2013; 84:103104. [PMID: 24182098 DOI: 10.1063/1.4824194] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We have developed a new momentum spectrometer dedicated to momentum vector correlations in the context of deep core photoionization of atomic and molecular species in the gas phase. In this article, we describe the design and operation of the experimental setup. The capabilities of the apparatus are illustrated with a set of measurements done on the sulphur core 1s photoionization of gas-phase CS2.
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Affiliation(s)
- C Bomme
- UPMC, Université Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique Matière et Rayonnement, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
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Chauvet C, Polack F, Silly MG, Lagarde B, Thomasset M, Kubsky S, Duval JP, Risterucci P, Pilette B, Yao I, Bergeard N, Sirotti F. Carbon contamination of soft X-ray beamlines: dramatic anti-reflection coating effects observed in the 1 keV photon energy region. J Synchrotron Radiat 2011; 18:761-764. [PMID: 21862857 DOI: 10.1107/s0909049511023119] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Accepted: 06/14/2011] [Indexed: 05/31/2023]
Abstract
Carbon contamination is a general problem of under-vacuum optics submitted to high fluence. In soft X-ray beamlines carbon deposit on optics is known to absorb and scatter radiation close to the C K-edge (280 eV), forbidding effective measurements in this spectral region. Here the observation of strong reflectivity losses is reported related to carbon deposition at much higher energies around 1000 eV, where carbon absorptivity is small. It is shown that the observed effect can be modelled as a destructive interference from a homogeneous carbon thin film.
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Affiliation(s)
- C Chauvet
- Synchrotron Soleil, L'Orme des Merisiers, Saint Aubin, Gif sur Yvette, France
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