Figure 4.

Scheme of an X-ray diffraction experiment in transmission geometry. The focused X-ray beam can probe different spatial positions on the sample. Diffraction pattern recorded by a 2D detector positioned behind the sample and polar coordinate system for evaluation of the angular cross-correlation function $C\left(q_1,q_2,\mathsf{\Delta }\right)$ are shown. The intensity of the diffraction pattern is coded by color.