In-house setup for laboratory-based x-ray absorption fine structure spectroscopy measurements

Abstract

We report on a laboratory-based facility for in-house x-ray absorption fine structure (XAFS) measurements. The device consists of a conventional x-ray source for the production of the incident polychromatic radiation and a von Hamos bent crystal spectrometer for the analysis of the incoming and transmitted radiation. The reliability of the laboratory-based setup was evaluated by comparing the Cu K-edge and Ta L 3 -edge XAFS spectra obtained in-house with the corresponding spectra measured at a synchrotron radiation facility. To check the accuracy of the device, the K-and L-edge energies and the attenuation coefficients below and above the edges of several 3d, 4d, and 5d elements were determined and compared with the existing experimental and theoretical data. The dependence of the XAFS spectrum shape on the oxidation state of the sample was also probed by measuring inhouse the absorption spectra of metallic Fe and two Fe oxides (Fe 2 O 3 and Fe 3 O 4 ).

HERMES – a GUI-based software tool for pre-processing of X-ray absorption spectroscopy data from laboratory Rowland circle spectrometers

“…The renaissance of laboratory X-ray absorption spectroscopy (XAS) instrumentation is revolutionizing access to, and uptake of, this technique across the physical sciences and engineering, enabling application of this technique without the need for access to a synchrotron light source (Błachucki et al, 2019;Honkanen et al, 2019;Jahrman et al, 2019a;Schlesiger et al, 2015;Malzer et al, 2018;Mortensen et al, 2016;Ne ´meth et al, 2016;Seidler et al, 2014Seidler et al, , 2016Zeeshan et al, 2019). In particular, commercial and user-built instrumentation based on a Rowland circle spectrometer with spherically bent crystal analyzers (SBCAs) used in the Johann configuration, and utilizing an energy-dispersive X-ray (EDX) detector, are gaining adoption, both as laboratory and regional facilities with a role complementary to, and symbiotic with, use of synchrotron radiation sources (Ditter et al, 2019).…”

Band tunable X‐ray flat crystal spectrometer for laser‐produced plasma spectroscopy measurements

“…However, the spectroscopic investigation of high‐temperature laser‐produced plasmas typically requires instruments with broad X‐ray energy coverage and high spectral, spatial, and temporal resolutions for such purposes. Recently, new classes of X‐ray spectroscopic instruments have been developed with improved characteristics 9,10 that can implement both dispersion and focusing.…”

Simultaneous two-color X-ray absorption spectroscopy using Laue crystals at an inverse-compton scattering X-ray facility

“…However, the limited access to the large facilities and constantly oversubscribed beam time (for example, the oversubscription for all beamlines at the European Synchrotron Radiation Facility was 275% in 2018 according to its annual highlight report of 2019) prevent XAS/ XES experiments from being conducted on a routine basis. For this reason, the last decade has witnessed intensive and significant development of modern laboratory XAS/XES setups using X-ray tubes (Seidler et al, 2014;Ne ´meth et al, 2016;Be `s et al, 2018;Błachucki et al, 2019;Ditter et al, 2019;Schlesiger et al, 2020;Zeeshan et al, 2020). Recent review articles (Zimmermann et al, 2020;Malzer et al, 2021) have provided detailed overviews of the laboratory setups and their applications.…”