Time-Resolved Energy-Dispersive XAFS Station for Wide-Energy Range at SPring-8

Journal Article · Fri Jan 19 00:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2436282· OSTI ID:21049241

Kato, K; Uruga, T; Tanida, H; Yokota, S; Imai, Y ^[1]; Okumura, K ^[2]; Irie, T ^[3]; Yamakata, Y ^[1]

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1. JASRI/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198 (Japan)
2. Department of Materials Science, Faculty of Engineering, Tottori University, Koyama-cho, Tottori 680-8552 (Japan)
3. SES/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198 (Japan)

A time-resolved energy-dispersive XAFS (DXAFS) station has been constructed at the bending magnet beamline BL28B2 at SPring-8 to study the local structural changes of materials during chemical reactions and functional processes. The bending magnet source at SPring-8 has a high photon flux above 50 keV. The purpose of this station is to measure DXAFS spectra in a wide energy range from 7 to 50 keV covering K-edges of lanthanides. Its main components are a polychromator with a bent silicon crystal, a mirror to reject higher harmonics, and a position-sensitive detector (PSD). To correspond to a wide energy range, polychromators for Bragg and Laue geometry were developed for the energy range below and above 12 keV, respectively. The PSD used is CCD coupled with a fluorescent screen and lens system. The fluorescent materials and their thickness were optimized for measurement in the x-ray range. Good quality spectra of Ce K-edge (40.5 keV) were obtained with exposures of 360 ms for the standard samples. The present status of the system and some experimental examples are presented in this report.

• OSTI ID: 21049241
• Journal Information: AIP Conference Proceedings, Vol. 879, Issue 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436282; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ABSORPTION SPECTROSCOPY
BEAM BENDING MAGNETS
CHARGE-COUPLED DEVICES
CRYSTALS
FINE STRUCTURE
KEV RANGE
MIRRORS
PHOTONS
POSITION SENSITIVE DETECTORS
RARE EARTHS
SILICON
SPRING-8 STORAGE RING
TIME RESOLUTION
X RADIATION
X-RAY DETECTION
X-RAY SPECTRA
X-RAY SPECTROSCOPY