Figure 4
Geometry of the scanning spectrometer. The beam is focused on the sample S by the monochromator M and collimated by the entrance slit ES, which is followed by an incident beam monitor Mon. The sample is located in a vacuum chamber on top of a stage, which provides translations and rotations. The bent analyser crystal A moves along the scattering direction and rotates during the scan. The detector slit tracts the focus of the analyser crystal by translations X, Y and rotation β. Scattering is monitored by a Ge detector SSD. |