Polaris technical information

Technical information

Technical Summary

Detectors

PositionVery low angleLow angle90 degreesBack scattering
TypeZnS scintillator3He gas tubes (½")ZnS scintillator3He gas tubes (1")
No. of detectors808021658
2Θ range13° - 15°28° - 42°85° - 95°130° - 160°
Ω(ster)0.0090.0460.480.29
Resolution (Δd/d)3 × 10-21 × 10-27 × 10-35 × 10-3
L2(m)~ 2.21.72 - 2.65~0.80.60 - 1.30
d range (Å)0.5 - 21.00.5 - 8.150.3 - 4.10.2 - 3.2

Instrument Parameters

BeamlineN7
Moderator316K H2O poisoned at 1.5 cm
Sample position12.0 m from moderator
Incident wavelength0.1 - 6.0 Å
Incident energy20 meV - 10 eV
Beam size at sample4.0 cm (height) × 2.0 cm (width)
Data acquisitionDell Power Edge rack mounted R200 server PC
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