A Scintillator-based detector with sub-100-m spatial resolution comprising a fibre-optic taper with wavelength-shifting fibre readout for time-of-flight neutron imaging

Nakamura, Tatsuya  ; To, Kentaro  ; Kawasaki, Takuro   ; Honda, Katsunori; Suzuki, Hiroyuki; Ebine, Masumi ; Birumachi, Atsushi; Sakasai, Kaoru  ; Soyama, Kazuhiko  ; Katagiri, Masaki*

A scintillator-based neutron-counting imaging detector with a sub-100-m spatial resolution was developed for energy-selective neutron imaging. The detector head of the detector comprised a thin ZnS/LiF scintillator screen, a fibre-optic taper and crossed wavelength-shifting (WLS) fibre arrays. The developed detector had a pixel size of 34 m 34 m, and exhibited spatial FWHM resolutions of 80 m and 61 m in the x and y directions, respectively. A small prototype detector demonstrated the capability of neutron imaging using Bragg edges of a Cu/Fe sample when using the pulsed-neutron source in the Materials and Life Science Experimental Facility at the Japan Proton Accelerator Research Complex.