Academic Journal
Dispersive X-ray absorption spectroscopy using independent grazing-incidence focusing and convexly bent Bragg-crystal dispersing optics
| Τίτλος: | Dispersive X-ray absorption spectroscopy using independent grazing-incidence focusing and convexly bent Bragg-crystal dispersing optics |
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| Συγγραφείς: | Juanjuan Huang, Adam P. Tornheim, Xianbo Shi, Mark Wolfman, Yanna Chen, Steve M. Heald, Shelly D. Kelly, George E. Sterbinsky |
| Πηγή: | J Synchrotron Radiat Journal of Synchrotron Radiation, Vol 32, Iss 4, Pp 1068-1084 (2025) |
| Στοιχεία εκδότη: | International Union of Crystallography (IUCr), 2025. |
| Έτος έκδοσης: | 2025 |
| Θεματικοί όροι: | Crystallography, QD901-999, Nuclear and particle physics. Atomic energy. Radioactivity, dispersive x-ray absorption spectroscopy, x-ray absorption fine structure, Beamlines, QC770-798 |
| Περιγραφή: | We present a modular instrument for dispersive X-ray absorption spectroscopy (DXAS) developed for the Advanced Spectroscopy Beamline at Sector 25 of the Advanced Photon Source. The setup employs a double-multilayer monochromator to provide X-rays with a broad energy bandwidth, Kirkpatrick–Baez mirrors for focusing, a convexly bent Bragg-crystal polychromator for energy dispersion, and a pixel-array detector to resolve all X-ray energies and collect their intensity simultaneously, thereby enabling acquisition of a full X-ray absorption spectrum in a single shot. The use of separate optics for X-ray focusing and energy dispersion provides high spatial resolution and avoids chromatic aberrations inherent in focusing bent-crystal optics, and a modular design makes implementation of the technique at other beamlines possible without requiring modifications to the upstream beamline configurations. Theoretical calculations are performed to determine optimal instrument operating parameters and demonstrate that an energy resolution better than the K-edge core-hole lifetime broadening can be maintained while providing a sufficient bandwidth for X-ray absorption near-edge structure spectroscopy through the full operating range of 5–11 keV. Additionally, instrument design, data analysis methods, and initial DXAS results on lithium–manganese–nickel oxide laminates are presented. |
| Τύπος εγγράφου: | Article Other literature type |
| ISSN: | 1600-5775 |
| DOI: | 10.1107/s1600577525004953 |
| Σύνδεσμος πρόσβασης: | https://doaj.org/article/eb685166ab6d4cc7b33844f391fe401b |
| Rights: | CC BY URL: http://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited. |
| Αριθμός Καταχώρησης: | edsair.doi.dedup.....9d9bf7a3f072ededbacbf2d5eeda2ff5 |
| Βάση Δεδομένων: | OpenAIRE |
| ISSN: | 16005775 |
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| DOI: | 10.1107/s1600577525004953 |