From x-ray telescopes to neutron scattering: Using axisymmetric mirrors to focus a neutron beam
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From x-rays to neutron mirrors_v9_as-published.pdf
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4.82 MB
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Author(s)
Khaykovich, Boris
Gubarev, M. V.
Bagdasarova, Yelena S.
Ramsey, B. D.
Moncton, David E.
Date Issued
December 2010
Journal
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publisher
Elsevier
Citation
Khaykovich, B. et al. “From x-ray telescopes to neutron scattering: Using axisymmetric mirrors to focus a neutron beam.” Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 631.1 (2011): 98-104.
Version
Author's final manuscript
Abstract
We demonstrate neutron beam focusing by axisymmetric mirror systems based on a pair of mirrors
consisting of a confocal ellipsoid and hyperboloid. Such a system, known as a Wolter mirror
configuration, is commonly used in x-ray telescopes. The axisymmetric Wolter geometry allows
nesting of several mirror pairs to increase collection efficiency. We have implemented a system
containing four nested Ni mirror pairs, which was tested by focusing a polychromatic neutron beam at
the MIT Reactor. In addition, we have carried out extensive ray-tracing simulations of the mirrors and
their performance in different situations. The major advantages of the Wolter mirrors are nesting for
large angular collection, and aberration-free performance. We discuss how these advantages can be
utilized to benefit various neutron scattering methods, such as imaging, SANS, and time-of-flight
spectroscopy.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Nuclear Reactor Laboratory
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1016/j.nima.2010.11.110
