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NG7 30-m Small Angle Neutron Scattering Instrument


Focusing Refractive Optics for SANS


Neutrons on Sample vs. Qmin

neutrons on Sample versus Q sub min
lambda = 8.44 A, delta lambda/lambda = 0.11, L sub 1 equals L sub 2 = 15.7 m, T sub L = 0.72
Below Q = 0.0038 Å-1, the lenses outperform pinhole collimation on the NCNR 30-m SANS instruments. For Qmin= 0.001 Å-1 the lenses provide ~ 10 times higher intensity on the sample than pinhole collimation!

Pinhole Collimation Geometry    |    Focusing Lens Geometry    |    Neutrons on Sample versus Qmin
Lens Installation    |    Sans from Arborescent* Graft Polymers

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Last modified 27-July-2005