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OrientExpress
Test Laue neutron-diffractometer
Characteristics
| Guide hall 1, End of the thermal neutron guide H23 |
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| Diffraction geometry |
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| Transmission or backscattering |
| Neutron beam | |
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| Flux at sample position | about 107n/cm2/s |
| Wavelength range | 0.8 - 3.2 Å |
| Sample stage-to-beam distance | 40 - 70 mm |
| Detector(1) | |
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| (1) Photonics Science Limited, Robertsbridge, East Sussex, TN32 3LA, United Kingdom. | |
| 2 CCD cameras | High performance thermoelectrically cooled image intensified CCD cameras |
| Scintillator | AST type ND blue, based upon6Li with added ZnS:AgThickness: 0.45 mmTotal active area: 252 x 198 mm2Each pixel is 144 µm on edgeDistance to sample: 35 mm to 195 mm |
| Geometry | from transmission (γ=0º) to back scattering (γ=180º), preferred γ angles: 0º, 90º, 180ºBeam divergence : about h= 0.6º, v= 0.8º |
| Coupling between both | Via a tapered fibre-optic, bonded directly onto the CCD, to give maximum transmission and high sensitivity |
| Tools |
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| Video system for crystal positioningSample transfer device |
| Data analysis |
| SoftwaresOrientExpress(indexation),Clip(indexation), orEsmeralda(indexation and integration) |
OrientExpress - Characteristics
Ref.: "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).