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Experiments and instruments

A series of short movies showing how neutron experiments are prepared or performed. Some of these movies have an historical interest since they captured important moments in the life of the ILL.

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Films and animations

D22

Impurity nano-particle gels in liquid helium

D22 is a small angle neutron scattering instrument particularly suited for real-time experiments and weakly scattering samples. It benefits from both high neutron flux and a sample zone easily adaptable to a wide range of configurations.

The video below shows the first neutron study of impurity nano-particle gels in superfluid helium. These gels discovered in 1999 [1] are assumed to be good candidates for future nano-particle based ultra-cold neutron (UCN) sources [2]. The experiment 3-15-48 was performed on D22 from 06/11/2006 to 08/11/2006. The impurities introduced into the liquid helium-4 were deuterium in the first experiment and then heavy water molecules.

Click here to download the 384x288 MEPG-4 file (2.9 Mb, 1'18)

Click here to download the 768x576 MEPG-4 file (15 Mb, 1'18)

©2006, Institut Laue-Langevin, Grenoble, France.

Ref.:
- Mezhov-Deglin and A. M. Kokotin (1999) Low Temperature Physics, 29, 515-518.
- V. V. Nesvizhevsky and L. P. Mezhov-Deglin, "Thermalization of neutrons in gels of ultracold particles" in Book of Abstracts, Third Chernogolovka Workshop on Low Temperature Physics in Microgravity Environment CWS-2002, Chernogolovka, Russia (2002), p. 40.

English checked by: Ronen Ghosh, April 2007.
Updates: A.Filhol, 16 Sept 2008, 8 Sept 2009.

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