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Figure 5
The average normalized intensity of the background (a) and diffraction spots (b), and the signal-to-noise ratio (c) as a function of exposure time and accelerating voltage. The error bars for the normalized background intensity indicate the standard deviation, or noise, of the background. Similarly, the error bars for the spot intensities indicate the standard deviation of the normalized intensity within the spot, which indicates the intensity range of the spot. The selected spots can be seen in Fig. 4[link]. The noise from (a) is also plotted as a function of the reciprocal square root of the exposure time in (d). A linear relation is expected and the broken red line in (d) is the least-squares fitted result.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 54| Part 1| February 2021| Pages 99-110
https://doi.org/10.1107/S1600576720014673
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