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

Sample stage-to-beam distance40 - 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


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


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


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).