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OrientExpress Test Laue neutron-diffractometer

Overview Characteristics How it works Publications Highlights Contacts Plus

Characteristics

Guide hall 1, End of the thermal neutron guide H23

Diffraction geometry
Transmission or backscattering

Neutron beam
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)
(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
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).