Twelve detector modules in total (June 2011), each consisting of 78 ZnS scintillator elements of 3mm width viewed in 2q. The scintillator elements are fibre-optically coupled to 15 photo-multiplier tubes using a modified 2CN15 coding scheme.
Nine detector modules constitute the main ‘transverse’ bank covering 81.2° < 2q < 98.8°, giving a 20ms frame d-spacing range of ~0.5 - 4.1 Å, with resolution Dd/d ~ 0.65%. These detectors are used for the standard (though-anvil) scattering geometry of the Paris-Edinburgh pressure cell.
At present the ‘longitudinal’ bank consists of three detector modules covering the back-scattering range 100° < 2q < 160°. A new large low-angle module covering 20° < 2q < 60° will be installed in early 2012.