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Proceedings Paper

Magnified neutron radiography with coded sources
Author(s): Philip R. Bingham; Hector Santos-Villalobos; Nickolay Lavrik; Hassina Bilheux; Jens Gregor
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Paper Abstract

A coded source imaging system has been developed to improve resolution for neutron radiography through magnification and demonstrated at the High Flux Isotope Reactor (HFIR) CG-1D instrument. Without magnification, the current resolution at CG-1D is 80μm using a charge-coupled device (CCD) equipped with a lens. As for all neutron imaging instruments, magnification is limited by a large source size. At CG-1D the size is currently limited to 12mm with a circular aperture. Coded source imaging converts this large aperture into a coded array of smaller apertures to achieve high resolution without the loss of flux for a single pinhole aperture, but requires a decoding step. The developed system has demonstrated first magnified radiographic imaging at magnifications as high as 25x using coded apertures with holes as small as 10μm. Such a development requires a team with a broad base of expertise including imaging systems design, neutron physics, microelectronics manufacturing methods, reconstruction algorithms, and high performance computing. The paper presents the system design, discusses implementation challenges, and presents imaging results.

Paper Details

Date Published: 7 March 2014
PDF: 10 pages
Proc. SPIE 9020, Computational Imaging XII, 90200A (7 March 2014); doi: 10.1117/12.2044587
Show Author Affiliations
Philip R. Bingham, Oak Ridge National Lab. (United States)
Hector Santos-Villalobos, Oak Ridge National Lab. (United States)
Nickolay Lavrik, Oak Ridge National Lab. (United States)
Hassina Bilheux, Oak Ridge National Lab. (United States)
Jens Gregor, The Univ. of Tennessee (United States)

Published in SPIE Proceedings Vol. 9020:
Computational Imaging XII
Charles A. Bouman; Ken D. Sauer, Editor(s)

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