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Powder Diffraction at Low Temperature

The four circle goniometer can be conveniently used for carrying out powder diffraction in ambient as well as in different sample environments, e.g. low and high temperature and high pressure. A cryostat for low temperature measurement is mounted on the goniometer. Samples can be in the form of powders or thin films/multilayers on solid substrates. An aluminized mylar window as the radiation shield and Be window for the vacuum shield is used in the cryostat. Typical scans are theta�2theta and sample temperature down to 10 deg K and in specific cases up to 4.2 deg K. The usable energy range of the synchrotron x-ray radiation is 7 to 20 keV. One can use either point detector (Cyberstar) or 100K 2D Pilatus detector for data collection.

Temperature Range: 
10 deg K CCR 
4 deg K CCR with exchange gas

Sample mount stage (type-1) Sample mount stage (type-2)
A picture of the 4-circle goniometer during scan Mounting of powder sample in capillary tube


Last Updated on Friday, 11 April 2014 19:18
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