Comparing the r-resolved X-ray signals generated by monochromatic and pink incident X-ray beams. The blue line corresponds to a truly monochromatic beam, the red squares to a pink beam with bandwidth η = 3%, and the black crosses to a pink beam with η = 15%. Contrary to the q-resolved signals, the r-resolved signals are hardly affected by the polychromaticity of the incident X-ray beams. Compare with Fig. 2.