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http://dx.doi.org/10.5573/ieie.2014.51.12.189

Design and Fabrication of HgI2 Sensor for Phosphor Screen based flat panel X-ray Detector  

Park, Ji Koon (Dept. of Radiological Science, International University of Korea)
Jung, Bong Jae (Dept. of Radiological Science, International University of Korea)
Choi, Il Hong (Dept. of Radiological Science, International University of Korea)
Noh, Si Cheol (Dept. of Radiological Science, International University of Korea)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.51, no.12, 2014 , pp. 189-194 More about this Journal
Abstract
In this study, from a new x-ray detector that combines a columnar CsI:Na scintillation layer with a photosensitive mercuric iodide layer was investigated. In this structure, X-rays are converted into visible light on a thick CsI:Na layer, which is then converted to electric charges in a thin $HgI_2$ bottom layer. The thin coplanar mercuric iodide films as a photosensitive converter requiring only a few tens of volts of bias, associated with a thick columnar coating of phosphor layer, were simulated and designed. The results of this research suggest that the new coplanar x-ray detector with a hybrid-type structure can resolve the following problems: high voltage from the a-Se, and low conversion efficiency from the indirect conversion method. The results of this research suggest that the new CsI:Na/$HgI_2$ x-ray detector with a double-layer type structure can resolve the following problems: high voltage from the direct conversion method, and low conversion efficiency from the indirect conversion method.
Keywords
mercuric iodide; photodetector; large area x-ray detector;
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Times Cited By KSCI : 3  (Citation Analysis)
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