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Investigation of the brightness enhancement using brightness enhancement films on a scintillator

Iikura, Hiroshi; Tsutsui, Noriaki*; Saito, Yasushi*; Nojima, Takehiro; Yasuda, Ryo; Sakai, Takuro; Matsubayashi, Masahito

In neutron imaging, to enhance brightness of a neutron detector is one of the important factors which lead to shortening of imaging time, or improvement in image quality. Recently, we devised a technique to increase the light intensity of reception for a camera by adding brightness enhancement films (BEF) on the output surface of the scintillator. By using the BEF (BEF II 90/24, Vikuiti 3M), brightness was enhanced, but spatial resolution was reduced. In this study, we compared the brightness and spatial resolution using several types of BEFs with different film thicknesses and prism pitch. In brightness, although the further enhancement was observed, most influences of film thickness or a prism pitch were not recognized. In spatial resolution, when film thickness became thin, the tendency for spatial resolution to improve was recognized.

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