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Monochromator Crystals

The ILL has firmly established itself as a pioneer in neutron science and technology. Neutron beams are used to carry out frontier research in diverse fields.

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Neutron technology at ILL



The monochromator is the first and most important optical component of most ILL instruments.

While many cold-neutron instruments use pyrolytic graphite which is commercially available with a controlled mosaic, monochromators and analysers for thermal and hot neutrons have had to be developed and produced in-house.


The ILL has acquired world-leading skills in the production of large copper and Heusler alloy crystals with controlled mosaic.

We also modify home-grown and commercially available germanium crystals to obtain specific values of curvature and mosaic.





The Monochromator Team

Jérémie Baudin-Cavallo,  Roland Hehn, Philipp Gausmann, Catherine Menthonnex, Benoît Mestrallet