Fig. 20From: Recent progress in instrumental techniques for architectural heritage materialsa 2D diffraction pattern of data collected on ID13 with 5 µm beam spot and in steps of 1 µm. The ordinate axis is step number, 1 step was equal to 1 µm; b 2D diffraction pattern of data collected at SRS MAD10 with 100 µm beam spot in steps of 100 µm [256], copyright (2006) Springer LinkBack to article page