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The Study of High-performance X-ray Detectors and Detection Systems

Author: XuMinJian
Tutor: GaoFuQiang; ZhouRiFeng
School: Chongqing University
Course: Pattern Recognition and Intelligent Systems
Keywords: Industry CT X-ray Detection Monte Carlo method Scintillator
CLC: TL812
Type: Master's thesis
Year: 2009
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Abstract


450KeV when General performance indicators to achieve more satisfactory results; crystal easy processing, with the highest luminous efficiency, can be applied with different energy range; BGO and CdWO4 ,as the high density scintillator, can be applied with different energy range,but used in high-energy X-ray （> 1MeV）, The two scintillator can give full play to their strengths.For the design of a high-performance X-ray detection system, detector （or the detection crystals） superior performance is an important advance, but the detection of crosstalk between crystals, optical transmission and collection efficiency, geometry and other factors also play a important role, this article also discussed in detail and research. Reduction crosstalk rate at the effective way to add the heavy metals isolation layer such as Pb or W between scintillator, through the wraping diffuse reflectance materials on the surface, at a smooth scintillator coupled with adhesive of the same refractive index can improve the light transmission and collection efficiency. Ray source、detected scintillator and objects to geometry location relationship of the spatial resolution of CT systems have an important impact.The research methods of combine with Monte Carlo simulation and experimental validation, finally, it was given the best size design for four different scintillator at different energy X-ray.

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CLC: > Industrial Technology > Nuclear technology > Particle detection,radiation detection and nuclear instrumentation > Radiation detection technology and instrumentation > Flicker detection technology and equipment
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