Figure 1
(a) DCM geometry according to the fixed beam impact point at the rotation axis O, showing Bragg angles and and the corresponding gaps g1 and g2, keeping constant offset H between the monochromatic and incident beams. (b) Effect of DCM inter-crystal parallelism variation ΔRx in the position of the virtual source δyΔRx. (c) DCM geometry including α and β miscut angles in asymmetric crystals, where represents the unit vector of the incident beam, the unit vector normal to the diffraction planes, which is made parallel to the gap g that defines the offset H, and D is the distance traveled by the beam between crystals [adapted from Sterbinsky & Heald (2021)]. |