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Figure 3
Beam center verification based on the assumption that solution scattering intensity is expected to be centro-symmetric. (a) Scattering intensity on either side of the beam along a vertical `line cut' is shown, created by taking the azimuthal average within two pie slices above and below the beam position in the 2D scattering pattern, as shown in the inset, where the red circle indicates q = 0.05 Å−1. A horizontal cut is also examined in practice. (b) The bar charts show the `coin toss' comparison between the two sets of data, for the current beam center position (blue), as well as after the center position is adjusted by 1 data point in either direction (green and orange). (c) The comparison is also plotted as histograms of the patch size (consecutive appearance of 1 or −1 in the bar charts). P-values for each case are shown. The null hypothesis is that the `coin toss' result is random, and therefore the two datasets are considered statistically identical. In this particular case, the beam center position may need to be adjusted.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 28| Part 4| July 2021| Pages 1237-1244
https://doi.org/10.1107/S160057752100521X
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