Figure 2
Schematic of X-ray diffraction of the iDCM (β = 0 corresponds to a conventional symmetric DCM). (a) The first crystal of the iDCM. PA is the projection of ki1 onto the yz plane. ϑi1 is the angle between PA and the y-axis. is the angle between ki1 and PA. ≥ 0 if ki1z ≥ 0, and < 0 if ki1z < 0. The angles of other wavevectors have similar definitions. (b) The second crystal with the same β. ki2 = ke1. Changing energies of the DCM is by the ϑ-rotation of the two crystals together around the x-axis. (c) Relationship between the xyz and XYZ coordinate systems. |