A small high sensitivity neutron detector using a wavelength shifting fiber

作者：Yagi T^*; Misawa T; Pyeon C H; Shiroya S

来源：Applied Radiation and Isotopes, 2011, 69(1): 176-179.

DOI：10.1016/j.apradiso.2010.07.016

• Wavelength shifting fiber
• Neutron detector
• (6)LiF
• ZnS(Ag)
• KUCA

A small neutron detector using an optical fiber was previously developed for reaction rate measurements at research reactors and accelerator facilities This detector can be inserted into narrow spaces and its spatial resolution is less than 1 mm however its neutron sensitivity is low because of the small size of its detector The purpose of this study is to develop a new optical fiber detector with high neutron sensitivity by using a wavelength shifting fiber Through the measurement of the reaction rate distribution in a reactor core we found that It is possible to increase the effective length of the detector resulting in increased neutron sensitivity compared with a conventional optical fiber detector Additionally using a longer wavelength shifting fiber the sensitivity can be in

• 出版日期2011-1