Magnified neutron radiography with coded sources

Philip R. Bingham; Hector Santos-Villalobos; Nickolay Lavrik; Hassina Bilheux; Jens Gregor

doi:10.1117/12.2044587

7 March 2014 Magnified neutron radiography with coded sources

Philip R. Bingham, Hector Santos-Villalobos, Nickolay Lavrik, Hassina Bilheux, Jens Gregor

Author Affiliations +

Proceedings Volume 9020, Computational Imaging XII; 90200A (2014) https://doi.org/10.1117/12.2044587
Event: IS&T/SPIE Electronic Imaging, 2014, San Francisco, California, United States

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.

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Philip R. Bingham, Hector Santos-Villalobos, Nickolay Lavrik, Hassina Bilheux, and Jens Gregor "Magnified neutron radiography with coded sources", Proc. SPIE 9020, Computational Imaging XII, 90200A (7 March 2014); https://doi.org/10.1117/12.2044587

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