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.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of SPIE-IS and T Electronic Imaging - Computational Imaging XII |
| Publisher | SPIE |
| ISBN (Print) | 9780819499370 |
| DOIs | |
| State | Published - 2014 |
| Event | Computational Imaging XII - San Francisco, CA, France Duration: Feb 5 2014 → Feb 6 2014 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 9020 |
| ISSN (Print) | 0277-786X |
| ISSN (Electronic) | 1996-756X |
Conference
| Conference | Computational Imaging XII |
|---|---|
| Country/Territory | France |
| City | San Francisco, CA |
| Period | 02/5/14 → 02/6/14 |
Funding
Notice: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC0500OR22725 with the U.S.Department of Energy. The United States Government retains and the publisher, by accepting the article for publication,acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license topublish or reproduce the published form of this manuscript, or allow others to do so, for the United States Governmentpurposes. Portions of this research were performed at the High Flux Isotope Reactor and at the Center for Nanophase Materials Science (CNMS) at Oak Ridge National Laboratory which are sponsored by the Scientific User Facilities Division, Office of Basic Energy Science, U.S. Department of Energy (US DOE) Funding support for this work comes from the early career award program out of the Accelerator and Detector Research program within the US DOE.