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Rev. Sci. Instrum. 81, 063107 (2010); doi:10.1063/1.3441983 (5 pages)

Double conical crystal x-ray spectrometer for high resolution ultrafast x-ray absorption near-edge spectroscopy of Al K edge

A. Levy, F. Dorchies, C. Fourment, M. Harmand, S. Hulin, J. J. Santos, D. Descamps, S. Petit, and R. Bouillaud

Centre Lasers Intenses et Applications (CELIA), Université de Bordeaux-CNRS-CEA, Talence F-33405, France

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(Received 22 January 2010; accepted 10 May 2010; published online 17 June 2010)

An x-ray spectrometer devoted to dynamical studies of transient systems using the x-ray absorption fine spectroscopy technique is presented in this article. Using an ultrafast laser-induced x-ray source, this optical device based on a set of two potassium acid phthalate conical crystals allows the extraction of x-ray absorption near-edge spectroscopy structures following the Al absorption K edge. The proposed experimental protocol leads to a measurement of the absorption spectra free from any crystal reflectivity defaults and shot-to-shot x-ray spectral fluctuation. According to the detailed analysis of the experimental results, a spectral resolution of 0.7 eV rms and relative fluctuation lower than 1% rms are achieved, demonstrated to be limited by the statistics of photon counting on the x-ray detector.

© 2010 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. X-RAY SPECTROMETER DESIGN
  3. ABSORPTION SPECTRA EXTRACTION
  4. MEASUREMENT ACCURACY
  5. CONCLUSION

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KEYWORDS and PACS

PACS

  • 07.85.Fv

    X- and γ-ray sources, mirrors, gratings, and detectors

  • 29.40.-n

    Radiation detectors

PUBLICATION DATA

ISSN:

0034-6748 (print)  
1089-7623 (online)

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