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We describe the theory, fabrication and experimental results of novel, compact optical elements for collimating and/or focusing beams of x-rays or thermal neutrons. These optical elements are solid composites consisting of regular stacks of alternating micro-foils, analogous in action to Soller slits. They are made out of pairs of metals with suitable refractive indices for reflection and/or absorption of the radiation. The performance of these proof-in-principle collimating elements is limited only by the choice of micro-foil materials and the uniformity of their interfaces.
Brendan E. Allman,Alberto Cimmino,Anthony G. Klein, andWilliam A. Hamilton
"Metal microarrays for collimating neutrons and x rays", Proc. SPIE 3449, X-Ray Microfocusing: Applications and Techniques, (6 November 1998); https://doi.org/10.1117/12.330345
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Brendan E. Allman, Alberto Cimmino, Anthony G. Klein, William A. Hamilton, "Metal microarrays for collimating neutrons and x rays," Proc. SPIE 3449, X-Ray Microfocusing: Applications and Techniques, (6 November 1998); https://doi.org/10.1117/12.330345