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Figure 20
Varying the flux of a 20 keV beam with an aluminium wedge and recording the total equivalent fine counts in a pixel, averaged over 500000 frames, as a function of thickness. The horizontal estimates of 1 and 10 photons per pixel per frame are based on the calibrations in Section 5.3[link], but note that no correction has been made here for the `excess leakage current' offset. Only the points shown in the residuals contributed to the linear fits and the r.m.s. linearity calculation.

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SYNCHROTRON
RADIATION
ISSN: 1600-5775
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