As a crucial device for synchrotron radiation (SR) beamlines, the double-crystal monochromator (DCM) is a complex and precise optical system with multiple integrated factors. The platform of the X-ray testline can detect the energy resolution, stability, and thermal deformation of monochromator crystals. Using an orthogonal analyzer crystal and a 2D detector, the angular divergence and energy bandwidth of the SR beam can be decoupled. This decoupling allows the DuMond diagram to transition from phase space to real space. The stability and the lattice deformation profile of the first crystal could be acquired by analyzing the willow-leaf DuMond diagram.
Fig4. The difference between the measured energy bandwidth and the theoretical value is within 10% by MDCM
Fig5. Measurement of stability of monochromator
Fig6. 2D thermal deformation of the first crystal in a monochromator
附件下载：