TEXS: in-vacuum tender X-ray emission spectrometer with 11 Johansson crystal analyzers
Résumé
X-ray instrumentation; Wavelength dispersive spectrometer; X-ray optics; Tender x-rays; Johansson crystal analysers Abstract Version 0.2.47.1 We describe the design and show first results of a large solid angle x-ray emission spectrometer that is optimised for energies down to 1.5 keV. The spectrometer is based on an array of eleven cylindrically bent Johansson crystal analysers arranged in a PREPRINT: Journal of Synchrotron Radiation A Journal of the International Union of Crystallography 2 point-to-point Rowland circle geometry. The smallest achievable energy bandwidth is equal or smaller than the core hole lifetime broadening of the absorption edges in this energy range. Energy scanning is achieved using an innovative design, maintaining the Rowland circle conditions for all crystals using only four motor motions. The entire spectrometer is encased in a high-vacuum chamber that allows use of a liquid Helium cryostat and provides sufficient space for in situ cells or operando catalysis reactors.
Domaines
Physique [physics]
Origine : Fichiers produits par l'(les) auteur(s)
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