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Figure 7
Possible experimental strategies to decrease X-ray-beam-induced heating of small crystals with 1 × 1015 photons s−1. (a) Schematics of the different beam profiles used in the modelling of the data shown in panel (b). The crystal size has been matched to the Gaussian FWHM and the tophat collimation. In the slitted Gaussian profile, the slits prevent the Gaussian tails reaching the solution surrounding the crystal. (b) The ΔT values in differently sized crystals using the different beam profiles shown in panel (a). In each case, the number of photons hitting the crystal has been kept the same at 1 × 1010. (c) Estimates of the necessary crystal speeds through the X-ray beam to ensure maximum ΔT values of 10, 5 and 1 K for crystals with a smallest dimension of <25 µm. These estimates assume a crystal translation length per temperature increase limit of the crystal/beam size.

IUCrJ
Volume 13| Part 2| March 2026| Pages 184-197
ISSN: 2052-2525
https://doi.org/10.1107/S2052252525011224