Figure 4
(a) Schematic view of the DCM/DMM dual monochromators, with the rotating center of the whole system situated at the center of the first crystal. (b) With the thin central region (50 × 20 × 3 mm), the double-U (back to back) Si crystal allows the cooling block to reach closer to the irradiated crystal surface for a more uniform temperature gradient between the crystal surface and the cooling block. |