Fig. 3: Dark-field 2D real-space correlation functions.
The Dark-field (DFI) 2D real-space correlation functions in Cartesian form retrieved through the sample to detector scan at 4.1 Å. The orthogonal coordinate system is express in terms of the autocorrelation lengths ξx and ξy in a similar manner as the small-angle neutron scattering (SANS) 2D-diffraction patterns. a DFI 2D real-space correlation function averaged over the whole field of view (FoV), averaging the scatting signal arising from the three different fibers orientations. The azimuthal angle, highlighted in gray, refers to ω. b–d Real-space correlation functions averaged over the segmented regions with diffident fibers orientations. The DFI 2D real-space correlation functions have been color coded in red for the 0° fibers orientation, green for the 120° and blue for the 240°, respectively. The four color coded concentric dashed circles in d refer to the contour lines at different autocorrelation lengths (0.04, 0.09, 0.26 and 0.51 μm). All the DFI 2D real-space correlation functions have been measured at 4.1 Å. The insets depict the four color coded different regions, within the FoV.
