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OrientExpress

An automatic Laue neutron-diffractometer based upon two high-performance image-intensified CCD cameras coupled to a large-area neutron scintillator. It allows electronic capture of neutron Laue diffraction patterns in a very short time (few seconds). A gain of about 100 in efficiency is obtained compared to the conventional film method with comparable spatial resolution.

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Laue diffractometer OrientExpress

Phone number on the instrument  +33 (0)4 76 20 72 90 (shared with CYCLOPS)

Phone on instrument ORIENTEXPRESS+33 (0)4 76 20

Instrument Team

NameFirst namePhone(s)SecretaryEmailFunction
OULADDIAFBachir+33 (0)4 76 20 7089
+33 (0)4 76 20 7141 		+33 (0)4 76 20 7226ouladdiaf(at)ill.frResponsible
LEMEE-CAILLEAUMarie-Helene+33 (0)4 76 20 7388
+33 (0)4 76 20 7933 		+33 (0)4 76 20 7226lemee(at)ill.euCo-responsible
ARCHERJohn+33 (0)4 76 20 7422
+33 (0)4 76 20 7129		+33 (0)4 76 20 7226archer(at)ill.frTechnician

General views

OrientExpress is a CCD-based flat-plate Laue diffractometer. The detector can be rotated around the sample and thus can accomodate any of the geometries from transmission to backscattering. In the latter case, the neutrons pass through the detector enclosure along a light-tight pipe through the centre of the scintillator.

With this instrument, a neutron Laue pattern can be obtained within a few seconds of beam time making it possible to both assess the sample quality and to orient it in a very short period of time.

OrientExpress in the transmission geometry (left) and in the backscattering geometry (right)

Sample transfer

OrientExpress also offers a sample transfer device making it possible to glue the sample at the end of a sample holder once it has been conveniently oriented.

References

"OrientExpress: A new system for Laue neutron diffraction ", Ouladdiaf B. , Archer J. , McIntyre G.J. , Hewat A.W. , Brau D. , York S., Physica B 385-386, 1052-1054 (2006).