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![[Figure 8]](ok5123fig8mag.jpg)
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Figure 8
Processing of the continuous XES scan data. (a) A sum of all images recorded during the scan, demonstrating the footprint of each SBCA reflection as they traverse the detector. The footprints help to define polygonal ROIs that are then used to compute individual SBCA XES intensities as a function of time using recorded images. The polygonal ROIs are marked with their corresponding SBCA index. (b) A set of elastic scans performed to experimentally determine the conversion between the pitch angle and energy for the central SBCA (i = 0). The pitch data are shown as deviations from the central positions that correspond to the Bragg angle of 79.81° (8035 eV). Prior to scanning, the spectrometer was set to the Bragg angle of 79.81° corresponding to 8035 eV, i.e. in between the Kα1 and Kα2 peaks, and the area detector was moved 75 mm out of the Rowland circle. The black lines show elastic signal computed as the sum of intensities recorded by the pixels located within the corresponding polygonal ROI shown in (a) and normalized by the incoming beam intensity. By fitting the data with Gaussian peaks, shown as red lines, we determined the peak positions for the calibration. (c) Comparison of the experimentally determined conversion from SBCA pitch (i = 0) to energy (black circles) with a line computed based on the Bragg law. (d) XES signals obtained for individual SBCAs. (e) Comparison of the continuous XES scan with the step scan performed on the same Cu foil. |
![[Figure 8]](ok5123fig8.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
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