Small Angle X-ray Scattering (SAXS) Measurements

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� In geometry of the system (Figure 7) a. Small Angle 4. On the goniometer put standard sample holder, remove diffracted beam monochromator and start automatic alignment. During the alignment you will be asked to put the SAXS sample holder. SAXS slit and other attachments. 5. Components that you will be asked to put are SAXS selection slit in place of PB slit Vacuum Path 2
SAXS Unit 6. Always put the sample in a way that sample surface faces the detector side. 7. For collecting SAXS data, run a 2theta scan. A representative scan condition is described in Table 1 below. 8. For analyzing SAXS data with NANO-Solver, a ratio of intensities (R) with and without sample is required, i.e. R = (Intensity with sample placed in sample holder using count monitor/Intensity without sample placed in sample holder using count monitor). Good values of R are between 1/3 to ½ (30-50%). a. If lower try slicing thinner sample or use reflection SAXS b. If too high, add a layer to sample to increase X-ray absorbance Theta-D = 0 Collect raw counts in theta/2theta mode with count monitor window and setting Theta-d and Theta-s at 0 degrees (0 degree for both arms by driving Theta-d and theta-s to zero) and using a Al absorber as attenuator in Manual Mode (see below), Make sure for all the runs the DS, RS and SS have same value. Now choose control axis as theta/2theta and using count monitor, press execute button. Note the counts both with and without the sample to get R. 3
Page 1: Small Angle X-ray Scattering (SAXS)
Page 6: Figure 1. SAXS Transmission holder

Small Angle X-ray Scattering (SAXS) Measurements

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