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NGB 30m SANS - Small Angle Neutron Scattering


NG3 SANS Schematic

Sponsored by the National Science Foundation as part of the Center for High Resolution Neutron Scattering (CHRNS), this instrument is installed on a split neutron guide NG-B. Designed to cover a wide Q-range, from 0.015 nm-1 to nearly 6 nm-1, it is suitable for examining structural features in materials ranging from roughly 1 to 500 nm. At least 75% of the instrument time will be allocated to guest researchers by the Beam Time Allocation Committee (BTAC).

Specifications / Capabilities:


0.015 nm-1 to 6.0 nm-1
Size Regime 1 nm to 500 nm
Source Neutron Guide (NG-B), cross-section: 60 mm x 60 mm
Monochromator  Mechanical velocity selector with variable speed and pitch
Wavelength Range
5.0 Å to 20.0 Å
Wavelength Resolution
10% to 30% Δλ/λ (FWHM)
Source-to-Sample Distance 4 m to 16 m in 1.5m steps via insertion of guide sections
Collimation Circular pinhole collimation
Sample Size 0 mm to 25 mm diameter
Sample-to-Detector Distance 1.3 m to 13.1 m continuously variable
Detector 640 mm x 640 mm 3He position-sensitive proportional counter with a 5.08 mm x 5.08 mm resolution

Access Information:

Obtaining Instrument Time

How NGB 30m SANS Beam Time is Typically Allocated in Each 38 Day Cycle:

  • 29 days - BTAC Proposals
  • Balance (9 days or less) - Proprietary and Collaborative Research
NG3 SANS Flux at Sample

Operating Schedule:


Name: Cedric Gagnon - Instrument Responsible
Phone: (301) 975-2020
Email: cedric.gagnon@nist.gov
100 Bureau Dr Stop 6102
Gaithersburg, MD 20899-6102

Name: Boualem Hammouda - Scheduling
Phone: (301) 975-3961
Email: hammouda@nist.gov

Name: Yun Liu - Instrument Scientist
Phone: (301) 975-6235
Email: yun.liu@nist.gov

Name: Paul Butler - Instrument Scientist
Phone: (301) 975-2028
Email: butler@nist.gov

Name: Yimin Mao - Instrument Scientist
Phone: (301) 975-6017
Email: yimin.mao@nist.gov