A 64 × 64 cm area position-sensitive scintillation neutron detector as an alternative to helium-3 gas based detector
2015
A two-dimensional scintillation neutron detector that has neutron-sensitive area of 64 × 64 cm 2 was developed for thermal neutron scattering instruments. The detector extensively used ZnS scintillation screens doped with 10 B or 6 Li and wavelength shifting fibers technology. The detector is designed to have a pixel size of 20 × 20 mm 2 to cover a large area with a small number of electronics channel for demonstration. The scintillation light was read out from both sides of each WLS fiber in order to increase a collected light. The prototype detector exhibited a detection efficiency of 50% for 1.9-A neutrons, which was similar to the detector developed in the past that has a neutron-sensitive size of 26 × 26 cm 2 .
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