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NG3 30-m Small Angle Neutron Scattering Instrument


Characteristics and Performance:


  • Source: neutron guide (NG-3), 60 mm x 60 mm
  • Monochromator: mechanical velocity selector with variable speed and pitch
  • Wavelength Range: 0.5 nm-2.0 nm
  • Wavelength Resolution: 10%-30% (FWHM)
  • Source-to-Sample Dist.: 4 m to 16 m in steps via insertion of neutron guide sections
  • Sample-to-Detector Dist.: 1.3 m to 13 m
  • Collimation: circular pinhole collimation
  • Sample Size: 0 to 25 mm diam
  • Q-Range: 0.015 nm-1 to 6 nm-1
  • Detector: 650 mm x 650 mm 3He position-sensitive proportional counter (5 mm resol.)
 Typical SANS Data

Neutron Flux on Sample as a Function of Qmin*:


Typical SANS Data

Qmin (nm-1)

Is(n/sec) in units of 105

0.015

0.2

0.020

0.5

0.040

4.0

0.1

30

*Measurements taken on a 15 mm diameter sample, and Δλ/λ = 0.15 (FWHM).

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Last modified 18-October-2005