Figure 2.

(a) Powder diffraction measurement that was recorded using four GE RT-41 panels at a particular beam position. A radial integration is performed along the highlighted vertical (A-axis) and horizontal (B-axis) directions to obtain the corresponding 1D diffraction patterns at each beam position. (b) Often this pattern follows a smooth trajectory along the radial direction, consisting of Bragg peaks resting on a smooth background. (Online version in colour.)