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Development of a fast neutron radiography converter using wavelength-shifting fibers |
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| Authors: | Masahito Matsubayashi Takashi Hibiki Kaichiro Mishima Koji Yoshii Koji Okamoto |
| Affiliation: | a Center for Proton Accelerator Facilities, Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan b Research Reactor Institute, Kyoto University, Kumatori, Sennan, Osaka 590-0494, Japan c Nuclear Engineering Research Laboratory, University of Tokyo, Tokai-mura, Naka-gun, Ibaraki 319-1106, Japan |
| Abstract: | A fluorescent converter for fast neutron radiography (FNR) comprising a scintillator and hydrogen-rich resin has been developed and applied to electronic imaging. The rate of the reaction between fast neutrons and the converter is increased by thickening the converter, but its opaqueness attenuates emitted light photons before they reach its surface. To improve the luminosity of a fluorescent converter for FNR, a novel type of converter was designed in which wavelength-shifting fibers were adopted to transport radiated light to the observation end face. The performance of the converter was compared with that of a polypropylene-based fluorescent converter in an experiment conducted at the fast-neutron-source reactor YAYOI in the University of Tokyo. |
| Keywords: | Fast neutron radiography Fluorescent converter Wavelength-shifting fiber Electronic imaging |
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