Our standard double crystal monochromator is a full in-vacuum solution. The entire optical system including the goniometer and all crystal adjustments are integrated into the vacuum vessel.
The monochromator is entirely built on one goniometer with the surface of the first crystal in the center of rotation.
The second crystal can be moved parallel and perpendicular to the crystal surface in order to realize a fixed beam offset during an energy scan.
Both, the first and the second crystal set-up can be equipped with pitch, roll and yaw adjustments. The optics sit on a massive granite support and are fully decoupled from the vacuum chamber. This enables a very stable set-up that is less influenced by external vibrations.
Energy Range: typically between 2.4 keV and 70 keV using Si(111) and/or Si(311) crystals
Fixed beam offset
Large energy range
Reliable, high precision linear stages
Very robust and compact design
Optics mechanically fully decoupled sitting on a massive granite block
Optics easily accessible in operational position via sliding door
Manual adjustment of the granite support for optics
Separate support for vacuum chamber
Full in-vacuum design, p < 2 x 10-7mbar
Water-cooled 1st crystal
Liquid Nitrogen cooling 1st and/or 2nd crystal
Water-cooling based temperature stabilization for motors
Crystal bender to compensate thermal bump
Crystal bender for sagittal focusing
Encoder systems for motorized axes
Horizontal or vertical motorization for in situ crystal exchange
Intensity feedback to the 2nd crystal pitch (MOSTAB developed at DESY)
Stepper motor drivers and controllers
Full control system based on SPEC, EPICS or LabVIEW®