A Half-millimetre spatial resolution fibre-coded linear position-sensitive scintillator detector with wavelength-shifting fibre read-out for neutron detection

Nakamura, Tatsuya  ; Schooneveld, E. M.*; Rhodes, N. J.*; Katagiri, Masaki; To, Kentaro  ; Sakasai, Kaoru  ; Soyama, Kazuhiko  

A fibre-coded linear scintillator detector with a half-millimetre spatial resolution was developed with wavelength-shifting fibre read-out. The head of the detector comprised a ZnS/LiF scintillator placed on the ribbon of WLS fibres. Both ends of the fibres were coded to reduce the number of read-out photomultipliers and associated electronic circuitry. The prototype detector in which the fibre ribbon was sandwiched between two ZnS/LiF scintillators exhibited a spatial resolution of 0.5 mm, a detection efficiency of 35% for 1- neutrons, and a sensitivity of less than . This type of detector would be useful where a submillimetre spatial resolution is required with large detector coverage such as in neutron reflectometers.