High energy resolution five-crystal spectrometer for high quality fluorescence and absorption measurements on an x-ray absorption spectroscopy beamline

Llorens Isabelle, Lahera Eric, Delnet William, Proux Olivier, Braillard Aurélien, Hazemann Jean-Louis, Brat Alain, Testemale Denis, Dermigny Quentin, Gelebart Frederic, Morand Marc, Shukla Abhay, Bardou Nathalie, Ulrich Olivier, Arnaud Stéphane, Berar Jean-François, Boudet Nathalie, Caillot Bernard, Chaurand Perrine, Rose Jérôme, Doelsch Emmanuel, Martin Philippe, Solari Pier Lorenzo. 2012. High energy resolution five-crystal spectrometer for high quality fluorescence and absorption measurements on an x-ray absorption spectroscopy beamline. Review of Scientific Instruments, 83 (6), 9 p.

Quartile : Q2, Sujet : INSTRUMENTS & INSTRUMENTATION / Quartile : Q2, Sujet : PHYSICS, APPLIED

Résumé : Fluorescence detection is classically achieved with a solid state detector (SSD) on x-ray absorption spectroscopy (XAS) beamlines. This kind of detection however presents some limitations related to the limited energy resolution and saturation. Crystal analyzer spectrometers (CAS) based on a Johann-type geometry have been developed to overcome these limitations. We have tested and installed such a system on the BM30B/CRG-FAME XAS beamline at the ESRF dedicated to the structural investigation of very dilute systems in environmental, material and biological sciences. The spectrometer has been designed to be a mobile device for easy integration in multi-purpose hard x-ray synchrotron beamlines or even with a laboratory x-ray source. The CAS allows to collect x-ray photons from a large solid angle with five spherically bent crystals. It will cover a large energy range allowing to probe fluorescence lines characteristic of all the elements from Ca (Z = 20) to U (Z = 92). It provides an energy resolution of 1-2 eV. XAS spectroscopy is the main application of this device even if other spectroscopic techniques (RIXS, XES, XRS, etc.) can be also achieved with it. The performances of the CAS are illustrated by two experiments that are difficult or impossible to perform with SSD and the complementarity of the CAS vs SSD detectors is discussed.

Mots-clés Agrovoc : spectroscopie aux rayons x, instrument de mesure, fluorescence, absorption, rayon x, mesure (activité)

Classification Agris : U30 - Méthodes de recherche

Champ stratégique Cirad : Hors axes (2005-2013)

Auteurs et affiliations

• Llorens Isabelle, CEA (FRA)
• Lahera Eric, OSUG (FRA)
• Delnet William, OSUG (FRA)
• Proux Olivier, OSUG (FRA)
• Braillard Aurélien, Institut Néel (FRA)
• Hazemann Jean-Louis, Institut Néel (FRA)
• Brat Alain, Institut Néel (FRA)
• Testemale Denis, Institut Néel (FRA)
• Dermigny Quentin, Institut de Minéralogie et de Physique des Milieux Condensé (FRA)
• Gelebart Frederic, Institut de Minéralogie et de Physique des Milieux Condensé (FRA)
• Morand Marc, Institut de Minéralogie et de Physique des Milieux Condensé (FRA)
• Shukla Abhay, Institut de Minéralogie et de Physique des Milieux Condensé (FRA)
• Bardou Nathalie, CNRS (FRA)
• Ulrich Olivier, CEA (FRA)
• Arnaud Stéphane, Institut Néel (FRA)
• Berar Jean-François, Institut Néel (FRA)
• Boudet Nathalie, Institut Néel (FRA)
• Caillot Bernard, Institut Néel (FRA)
• Chaurand Perrine, Aix-Marseille université (FRA)
• Rose Jérôme, CNRS (FRA)
• Doelsch Emmanuel, CIRAD-PERSYST-UPR Recyclage et risque (FRA) ORCID: 0000-0002-7478-4296
• Martin Philippe, CEA (FRA)
• Solari Pier Lorenzo

Source : Cirad - Agritrop (https://agritrop.cirad.fr/564856/)

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