Feasibility of a large area detector for fast neutron imaging

The paper analyses the factors affecting the detection efficiency and the spatial resolution of the luminescent detectors intended for fast neutron imaging. An analytical approach has been used for this purpose. A design of the large area detector based on the application of a matrix screen and a set of crossed wavelength shifting fibers (WLS) for reading out the scintillation signal has been suggested. The spatial resolution of the detector depends on the cross section of the matrix cell. The detection efficiency of the detector is sufficiently high and can amount to about 25% for the screen made of polyvinyl toluene in the case of 14 MeV neutrons.