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Figure 2
A detector grid (top) and hypothetical one-dimensional I (X-rays pixel−1) versus q profile (bottom) to illustrate the read-noise analysis. The top section shows two q increments, qi and qi+1 (the beamstop is drawn to indicate the selected position of the beam center). The plot at the bottom shows a possible one-dimensional profile resulting from radial integration of an image with no illumination. An ideal detector would measure zero at all q increments. Dashed green lines that run vertically display sectioning of the profile into a range of q increments for calculation of the noise σprofile(qL,qH). The black horizontal dashed line shows the detector global pedestal level (mean value).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 18| Part 2| March 2011| Pages 148-156
https://doi.org/10.1107/S0909049510045607
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