Typical raw images obtained on the XPAD3.1 detector, showing small parts of Debye–Scherrer rings for (a) experiment A (intensity range 0–1800) and (b) experiment B (intensity range 0–140 000). The images are plotted in log scale. Only modules 2–7, centred on the scattered signals, are shown. The dramatic difference in peak width results from the different microstructures (nanometre versus micrometre grain sizes). Some dead pixels and dead lines can be observed on both images.