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Report No.

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/$$^{6}$$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/$$^{6}$$LiF scintillators exhibited a spatial resolution of 0.5 mm, a detection efficiency of 35% for 1-${AA}$ neutrons, and a $$gamma$$ sensitivity of less than $$10^{-7}$$. This type of detector would be useful where a submillimetre spatial resolution is required with large detector coverage such as in neutron reflectometers.



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Category:Instruments & Instrumentation



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