Figure 9
(a) A full 2048 × 2048 diffraction image of the CeO2 calibration standard. The dashed white lines indicate the radial limits and 15° azimuthal sector boundaries used for polar re-binning. (b) The re-binned image using 1000 × 24 (radial × azimuthal) bins and initial instrument parameters obtained from FIT2D. The dashed white lines again indicate the azimuthal bin boundaries. The deviations in the radial positions of the labeled diffraction lines as a function of η, most visible in {222} and {400}, arise primarily from errors in the initial pattern center and tilt angle estimates used in the re-binning process. While radial distortion also contributes to such deviations, the magnitudes under consideration here are imperceptible at this scale. |