| 摘要 |
The invention provides an improved neutron detector of fast neutrons and may be used particularly in the advanced detection technologies for the non-intrusive interrogation of passengers luggage, large cargo and trucks. The proposed detector of fast neutrons consists of fiber block (parallelepiped), which is assembled of the layers of polymer scintillating fibers, oriented in two mutually perpendicular directions and optoelectronic system of registration of optical irradiation. Optoelectronic system of registration is based upon position sensitive photo-receivers, which are optically coupled with corresponding of fiber edges. Optoelectronic system consists of two local optical sub-systems. The first (main) sub-system matches each individual fiber edge with corresponding element of two-dimensional position sensitive photo-receiver. The second (complementary) sub-system matches columns and rows of fiber edges with corresponding individual pixels of fast linear photo-receivers.
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