19 July 1996 High quantum-detection efficiency and low-cost metal/plastic fibers 2D imager for MeV radiography
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Abstract
We have tested a new concept of segmented scintillating block in order to realize a low cost fast 2D integrating imager for hard x-ray radiography and for neutron radiography. COntrary to other scintillating camera for high energy imaging, our scintillating materials is not made up of heavy crystal; it is composed of less expensive scintillating plastic fibers. However, in order to insure a higher detection quantum efficiency, these fibers are surrounded by a lead x-ray electron converter (lead coating). This hybrid scintillating block is then adjusted upon a microchannel plate image intensifier. We present experimental results about the performances of this kind of scintillating device as a hard x-ray imager. We can notice that the detection quantum efficiency is very high, and simultaneously the spatial resolution is preserved by this kind of pixellization. We have demonstrated that such a hybrid scintillating set-up is already interesting in order to constitute a NeV radiography detector. It reaches the quantum limit of detection and can also provide images at high dose rate. On the same principle, with a light metal replacing the lead it is possible to make an efficient fast neutron imaging device.
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Jean-Louis Gerstenmayer, Maurice Jurion, Pierre Nicolas, Didier Nore, Damien Lebrun, Claude Hennion, "High quantum-detection efficiency and low-cost metal/plastic fibers 2D imager for MeV radiography", Proc. SPIE 2859, Hard X-Ray/Gamma-Ray and Neutron Optics, Sensors, and Applications, (19 July 1996); doi: 10.1117/12.245148; https://doi.org/10.1117/12.245148
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