2011年7月
Development of a Small-Aperture Slit System for a High Collimator Ratio at the Thermal Neutron Radiography Facility in JRR-3
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
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- 巻
- 48
- 号
- 7
- 開始ページ
- 1094
- 終了ページ
- 1101
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.3327/jnst.48.1094
- 出版者・発行元
- TAYLOR & FRANCIS LTD
A small-aperture slit system has been developed and installed to enhance the collimator ratio ("L/D") of the thermal neutron radiography facility (TNRF) in JRR-3. The degree of unsharpness on neutron images is reduced by increasing the LID. The small-aperture slit system increased the LID by creating a small aperture size ("D"). Image sharpness improved when the aperture size was reduced to below 10 mm by 1 0 mm in the TNRF. On the other hand, there was almost no difference in unsharpness on images obtained above 10 mm by I 0 mm in aperture size. These results indicate that an aperture size of less than 10 mm by 10 mm should be used for high-spatial-resolution imaging at the TNRF. The beam area of the small-aperture slits was relatively small in comparison with that of a conventional large collimator, though gradually increasing with increasing aperture size. Even with an aperture size of 5 mm by 5 mm, the practical beam area for imaging examinations corresponded to around 25 mm by 20 mm, which is enough area to carry out high-spatial-resolution imaging.
- リンク情報
- ID情報
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- DOI : 10.3327/jnst.48.1094
- ISSN : 0022-3131
- eISSN : 1881-1248
- Web of Science ID : WOS:000294524100013