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Figure 2
(a) Center and (b) off-center accessible q ranges at different SDDs for both Cu Kα and Mo Kα radiation. When the direct beam is on the detector's active area (center position), qmin (the smallest scattering angle) is assumed to be at a value of 4 × FWHM of direct beam intensity. For the off-center configuration, scaled representations of the detector vacuum tube (black semicircle) and detector active area (yellow rectangles) for two different SDDs (523 and 1613 mm) are shown. The blue (Cu Kα) and red (Mo Kα) semicircles represent scattering rings at different accessible q values (nm−1) and their relative positions on the detector's active area.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 53| Part 3| June 2020| Pages 722-733
https://doi.org/10.1107/S1600576720005208
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