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Resolution of small‐angle neutron scattering with a reflective focusing optic
Author(s) -
Mildner David F. R.
Publication year - 2014
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576714011364
Subject(s) - optics , collimated light , pinhole (optics) , resolution (logic) , sample (material) , physics , scattering , small angle neutron scattering , detector , small angle scattering , solid angle , neutron , neutron scattering , laser , nuclear physics , computer science , artificial intelligence , thermodynamics
A small‐angle neutron scattering instrument that uses a reflective focusing optic can achieve smaller values of the scattering vector, and with higher resolution, than the usual pinhole collimation. When the focusing mirror images the source onto the detector, the analytic expression for the resolution is independent of the sample area and is principally determined by the beam divergence incident on the sample, modified by the distance between the optic and the sample. The results are applied to a focusing SANS instrument with axisymmetric mirrors.