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Figure 2
The effects of damage on the atomic structure factor. The term f0(q) is the undamaged atomic scattering factor for an unionized C atom, A(q) is proportional to the mean intensity per C atom at each resolution shell, B(q) is proportional to the speckle contrast for carbon and σB(q) is the standard deviation of the shot-to-shot fluctuations of the speckle due to damage. When there is no damage, A(q) and B(q) are equal to f20(q). The simulation parameters were 8 keV photon energy, 40 fs pulse duration, 2 mJ pulse energy and spot size of 100 × 100 nm.

IUCrJ
Volume 2| Part 6| October 2015| Pages 661-674
ISSN: 2052-2525
doi:10.1107/S2052252515016887