Photonic Science
Professional Imaging

Cylindrical Neutron Laue Detector System

 

Ultra low noise, high sensitivity large area 360 degree mosaic neutron imaging detector collects diffraction patterns over 70% of 4Pi steradian.

Neutron imaging systems are based upon very high sensitivity image intensified cameras, optically coupled to Scintacor neutron scintillators. Typical input sizes are 400 mm to 1 m and so an array of cameras are used, with software corrections for gain matching, stitching etc. Intensifiers are low dark current blue sensitive, matched to blue scintillator output.

The Cyclops panoramic neutron diffraction imaging system was installed at ILL in Grenoble, featuring 16 linked cameras providing a 360 degree coverage of the sample diffraction spots.

The detector is based upon an octagon of scintillating plates that forms a 360 degree hollow vertical cylinder 400 mm in diameter and 400 mm high with the neutron beam entering in the equatorial plane.

The camera delivers a resolution of 2260(h)x7505(w) pixels with 177 µm square (no binning) and 2.5 seconds read out cycle. High sensitivity / high resolution is achieved thanks to the use of custom scintillator and intensified cooled CCD camera read out which enables high electro optical gain down to singe neutron sensitivity.

The detector construction allows the change of the scintillator assembly. The flexible design will also ease the generation of new calibration map files resulting from scintillator change and camera service. The cameras have a 16-bit acquisition mode and a fast 12-bit readout mode.

Exposures of 1ms to a few hours in dynamic integration mode are possible.

REFERENCE ARTICLES

Coulomb spin liquid in anion-disordered pyrochlore Tb2Hf2O7
Nature Communications 2017 ( DOI: 10.1038/s41467-017-00905-w )

Low-energy phonon dispersion in LaFe4Sb12
Physical Review B 91, 014305 2015 (DOI: 10.1103/PhysRevB.91.014305)

Coexisting hydroxyl groups and H2O molecules in minerals: A single-crystal neutron diffraction study of eosphorite, MnAlPO4(OH)2·H2O
Open Archive ILL-ESRF (OA ILL-ESRF) 2013 (DOI: 10.2138/am.2013.4438)

OrientExpress: A new system for Laue neutron diffraction
Physica B Condensed Matter 385:1052-1054 2005 (DOI: 10.1016/j.physb.2006.05.337)

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