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NG7 30-m Small Angle Neutron Scattering Instrument


Instrument Performance:


Flux at the Sample:

Flux at Sample for NG7 SANS - Velocity Selector tilt angle = 0 degrees ( delta lambda lambda = 11 percent)

Flux (n/cm2-sec) at the sample versus wavelength (Å). The upper curve is for the maximum number of guides (Ng = 8), giving a source aperture size of 5.0 cm diameter; the lower curve is for no guides (Ng = 0) in the pre-sample collimation section and a source aperture of 3.8 cm diameter. The Δλ/λ was set at 11%.


'Typical' SANS Data:

chart Cross sectional view of the atomic structure of Apoferritin derived from x-ray crystallography
cross sectional view

SANS data for a 1 mass % solution of the protein Apoferritin (456 K daltons) in D2O. The data were collected at two sample-to-detector distances (1.6 m and 6.0 m) at a wavelength of 6 Å (11 % FWHM wavelength spread). Counting time was 15 min. at each distance. The data are fit (red line) to a spherical core/shell model smeared (convoluted) with the instrumental resolution function.


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Last modified 29-July-2005