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Figure 1
(a) Well centered crystal in a primary beam. The crystal center (A) coincides with the goniometer center (Cg). Rotating the DAC with a crystal by 30° (marked in blue) maintains this alignment, with the crystal center (A′) remaining at (Cg). (b) The crystal center (B) is offset from the goniometer center (Cg) by 0.1 mm in the direction of the microscope. After rotating the DAC by 30°, the crystal center (B′) is in a significantly different position (marked in red). In this case, a portion of the crystal moves outside the primary beam, reducing the diffracting crystal volume and power.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 58| Part 1| February 2025| Pages 251-259
https://doi.org/10.1107/S1600576724012500
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