Neutron Laue diffractometer

Low temperatures with CYCLOPS

This movie was recorded during an experiment down to 50 mK. The sample was mounted at the cold end of a dilution insert, and then inserted in the helium cryostat of CYCLOPS.
Laue patterns where recorded during the temperature decrease thus providing a quasi real-time observation of the appearance and evolution of satellites while the sample underwent two successive phase transitions.
What you see in the movie is, in fact, a mixture of two experiments. During the 50 mK experiment the target temperature was easly reached but the sample was destroyed due to an improper handling.