Monochromator Angle Detection

Monochromator Angle Detection

highly accurate interferometric measurement for angle control in DCMs

Monochromators play a key role in hard X-ray applications of synchrotrons worldwide.
The function of a monochromator is to select and transmit X-ray radiation of the desired photon energy from an incident white synchrotron radiation beam. Using double-crystal monochromators (DCMs) allows it to produce a monochromatic exit beam. The specific energy is selected by rotations of the crystals and thereby varying the Bragg angle.

For the best X-ray exit beam quality the position, angular adjustment, and stability needs to be nanometer precise. This can only be ensured by monitoring the movements with a suitable sensor, allowing active compensation for misalignments. As the monochromators are operated in ultra-high vacuum (UHV), radiation harsh environments, as well as high and low temperatures, the metrology equipment must provide ultimate precision even in these challenging conditions. 

attocube's solution

attocube`s modular and fiber-based IDS3010 laser interferometer sensor offers accurate displacement measurements in extreme environments. The compact sensor heads can be flexibly integrated in the monochromator system, while the simultaneous measurement with all 3 optical axes allows angular measurements with one device.  

Displacement Sensor IDS3010

displacement sensors, ids

Control Unit
  • multi-axis measurements 
  • multiple real-time interfaces
  • certified accuracy in the nanometer range 
Sensor Heads
  • vacuum, low & high temperature, and radiation compatible
  • continuous working range 0-5 m
  • miniaturized sensor heads