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Cryo-Cooled Horizontally Deflecting DCM

installed on XFM Beamline at the Australian Synchrotron

The IDT DCM installed on the X-ray Fluorescence Microprobe beamline at the Australian Synchrotron is a horizontally deflecting fixed-offset monochromator operating over an energy range of 4keV - 25keV, with Si(111) & Si(311) crystal sets in single chamber

The DCM features a novel cryo-cooling system with soft annealed copper couplings giving minimal vibration transmission from the cooling circuit to the first crystal while maintaining excellent thermal contact.

Other features of the DCM include:

IDT’s unique approach of multiple thermal barriers thermally isolates the crystals and cryogenic cooling circuit from the rest of the monochromator. This prevents thermal leakage into the monochromator mechanics and minimises thermo-mechanical drift, removing the need for water stabilisation circuits and offering exceptional mechanical stability.

18 nrad Beam Stability Measurements

Click to enlarge

Thermocouple Readings

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Cryo-cooled Horizontal DCM crystal cage Technical Data Cryo-cooled Horizontal DCM installed on XFM beamline