|Moderator||300K water moderator poisoned at 1.5 cm|
|Incident energy||15-2000 meV|
|Energy resolution||Depends on the choice of Fermi chopper|
D hw /Ei =1-2% (4m detectors) 1-3% (2.5m detectors)
|Primary flight path||12m|
|Secondary flight path||2.5m and 4m|
|Fermi Chopper||10m from moderator|
50-600 Hz phased to ISIS pulse ± 0.1m s
Several chopper packages are available optimised for different incident energy and resolution requirements
|Background chopper||8.5m at 50 Hz or 100 Hz|
|Sample position||11.82m from moderator|
|Beam size at sample||45mm x 45mm, motorised jaws can define smaller beam sizes|
|Detectors||Low Angle Bank|
2.5m from sample 256 10atm 3He tubes in 8 fold array covering 9-29º scattering angle
4.0m 52 position sensitive 3He detector array (10 bar partial pressure) 2.5 cm diameter, resolution 15mm along their lengths covering 3-7º scattering angle
110º - 125º 4m bank: 44 10 bar 3He tubes.
130º - 140º 2.5m bank: 44 10 bar 3He tubes.
|Monitors||Monitor 1: incident beam monitor|
Monitor 2: -1.615m from sample.
Monitor 3: 5.694m from sample.
|Intensity at Sample||.3x103n cm-2 s-1 at Ei=1eV (for 150Amps proton current)|
|Sample environment||Accepts all standard sample environment equipment|
|Data acquisition||Alphastation personal workstation|