title: High energy resolution five-crystal spectrometer for high quality fluorescence and absorption measurements on an x-ray absorption spectroscopy beamline.
abstract: 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.
authors: CEA∕DSM∕INAC∕SP2M∕NRS, F-38054 Grenoble cedex 9, France.
authors: Isabelle
authors: I
authors: Llorens
authors: Eric
authors: E
authors: Lahera
authors: William
authors: W
authors: Delnet
authors: Olivier
authors: O
authors: Proux
authors: Aurélien
authors: A
authors: Braillard
authors: Jean-Louis
authors: JL
authors: Hazemann
authors: Alain
authors: A
authors: Prat
authors: Denis
authors: D
authors: Testemale
authors: Quentin
authors: Q
authors: Dermigny
authors: Frederic
authors: F
authors: Gelebart
authors: Marc
authors: M
authors: Morand
authors: Abhay
authors: A
authors: Shukla
authors: Nathalie
authors: N
authors: Bardou
authors: Olivier
authors: O
authors: Ulrich
authors: Stéphan
authors: S
authors: Arnaud
authors: Jean-François
authors: JF
authors: Berar
authors: Nathalie
authors: N
authors: Boudet
authors: Bernard
authors: B
authors: Caillot
authors: Perrine
authors: P
authors: Chaurand
authors: Jérôme
authors: J
authors: Rose
authors: Emmanuel
authors: E
authors: Doelsch
authors: Philippe
authors: P
authors: Martin
authors: Pier Lorenzo
authors: PL
authors: Solari
mesh_terms: D018360:Crystallography, X-Ray / Q000295:instrumentation* / Q000379:methods*; D005453:Fluorescence; D017356:Synchrotrons / Q000295:instrumentation*; D056928:X-Ray Absorption Spectroscopy / Q000295:instrumentation* / Q000379:methods*