OrientExpress

Test Laue neutron-diffractometer

Guide hall 1, End of the thermal neutron guide H23

Diffraction geometry
Transmission or backscattering

Neutron beam
Flux at sample position	about 10⁷ n/cm²/s
Wavelength range	0.8 - 3.2 Å

Detector ⁽¹⁾
(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 upon ⁶Li with added ZnS:Ag Thickness: 0.45 mm Total active area: 252 x 198 mm² Each pixel is 144 µm on edge Distance to sample: 35 mm to 195 mm
Geometry	from transmission (γ=0º) to back scattering (γ=180º), preferred γ angles: 0º, 90º, 180º Beam 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
Video system for crystal positioning Sample transfer device
Data analysis
Softwares OrientExpress (indexation), Clip (indexation), or Esmeralda (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).