11 October 2012 On the challenge of flux concentration at grazing incidence for neutrons and x-rays
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Abstract
Designing optical systems for concentrating the flux of thermal neutrons and x-rays is severely constrained by the requirement of grazing incidence, i.e., the exceedingly small angles for total external reflection at mirror surfaces. As a result, the design principles established for non-imaging (i.e. flux concentrators) optics for visible light must be reconsidered. We present new concepts for improving the attainable flux density from neutron sources. In particular, we show how nested axisymmetric mirror systems including up to three reflections can achieve significantly higher concentrations.
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Boris Khaykovich, Dazhi Liu, Giacomo Resta, David E. Moncton, Mikhail V. Gubarev, "On the challenge of flux concentration at grazing incidence for neutrons and x-rays", Proc. SPIE 8485, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration IX, 848509 (11 October 2012); doi: 10.1117/12.929328; https://doi.org/10.1117/12.929328
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KEYWORDS
Mirrors

X-rays

Optical design

Grazing incidence

Nonimaging optics

Reflectivity

Solids

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