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Cross JO, Elam WT, Harris VG, et al. Sample-angle feedback for diffraction anomalous fine-structure spectroscopy. J Synchrotron Radiat. 1998;5:911-3doi: 10.1107/S0909049597014313.
Cross, J. O., Elam, W. T., Harris, V. G., Kirkland, J. P., Bouldin, C. E., & Sorensen, L. B. (1998). Sample-angle feedback for diffraction anomalous fine-structure spectroscopy. Journal of synchrotron radiation, 5911-3. https://doi.org/10.1107/S0909049597014313
Cross, J O, et al. "Sample-angle feedback for diffraction anomalous fine-structure spectroscopy." Journal of synchrotron radiation vol. 5 (1998): 911-3. doi: https://doi.org/10.1107/S0909049597014313
Cross JO, Elam WT, Harris VG, Kirkland JP, Bouldin CE, Sorensen LB. Sample-angle feedback for diffraction anomalous fine-structure spectroscopy. J Synchrotron Radiat. 1998 May 01;5:911-3. doi: 10.1107/S0909049597014313. Epub 1998 May 01. PMID: 15263694.
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J Synchrotron Radiat. 1998 May 01;5:911-3. doi: 10.1107/S0909049597014313. Epub 1998 May 01.

Sample-angle feedback for diffraction anomalous fine-structure spectroscopy.

Journal of synchrotron radiation

J O Cross, W T Elam, V G Harris, J P Kirkland, C E Bouldin, L B Sorensen

Affiliations

  1. Naval Research Laboratory, Washington, DC 20375, USA.

PMID: 15263694 DOI: 10.1107/S0909049597014313

Abstract

Diffraction anomalous fine-structure (DAFS) experiments measure Bragg peak intensities as continuous functions of photon energy near a core-level excitation. Measuring the integrated intensity at each energy makes the experiments prohibitively slow; however, in many cases DAFS can be collected quickly by measuring only the peak intensity at the center of the rocking curve. A piezoelectric-actuator-driven stage has been designed and tested as part of a sample-angle feedback circuit for locking onto the maximum of the rocking curve while the energy is scanned. Although software peak-tracking requires only a simple calculation of diffractometer angles, it is found that the additional hardware feedback dramatically improves the reproducibility of the data.

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