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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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A linear detector array unit (LDAU) was proposed and designed for the high energy X-ray 2-D and 3-D imaging systems for industrial non-destructive test. Specially for 3-D imaging, a helical CT with a 15 MeV linear accelerator and a curved detector is proposed. The arc-shape detector can be formed by many LDAUs all of which are arranged to face the focal spot when the source-to-detector distance is fixed depending on the application. An LDAU is composed of 10 modules and each module has 48 channels of CdWO4 (CWO) blocks and Si PIN photodiodes with 0.4 mm pitch. This modular design was made for easy manufacturing and maintenance. Through the Monte Carlo simulation, the CWO detector thickness of 17 mm was optimally determined. The silicon PIN photodiodes were designed as 48 channel arrays and fabricated with NTD (neutron transmutation doping) wafers of high resistivity and showed excellent leakage current properties below 1 nA at 10 V reverse bias. To minimize the low-voltage breakdown, the edges of the active layer and the guard ring were designed as a curved shape. The data acquisition system was also designed and fabricated as three independent functional boards; a sensor board, a capture board and a communication board to a PC. This paper describes the design of the detectors (CWO blocks and Si PIN photodiodes) and the 3-board data acquisition system with their simulation results.
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참고문헌 (6)
참고문헌 신청
Butt A. / 2014 / A Review of Real Time Radiography as a s Solid Propellant Burn Rate Measurement Technique / AIAA Region II Student Conference
Martz HE / 1990 / Computed Tomography Systems and Their Industrial Applications / Int. J. Radiat. Appl. Instrum. Part A 41(10):943~964
Nikl M. / 2006 / Scintillation Detectors for X-rays / Meas. Sci. Tech 17(4):37~54
Park KS / 2006 / Effects of the Resistivity and Crystal Orientation of the Silicon PIN Detector on the Dark Current and Radiation Response Characteristics / IEEE Nuclear Science Symposium and Medical Imaging Conference
Xiao Y / 2016 / Development and Applications of High Energy Industrial Computed Tomography in China / 19th World Conference on Non-Destructive Testing
Martz HE / 1990 / Computed Tomography Systems and Their Industrial Applications / Int. J. Radiat. Appl. Instrum. Part A 41(10):943~964
Nikl M. / 2006 / Scintillation Detectors for X-rays / Meas. Sci. Tech 17(4):37~54
Park KS / 2006 / Effects of the Resistivity and Crystal Orientation of the Silicon PIN Detector on the Dark Current and Radiation Response Characteristics / IEEE Nuclear Science Symposium and Medical Imaging Conference
Xiao Y / 2016 / Development and Applications of High Energy Industrial Computed Tomography in China / 19th World Conference on Non-Destructive Testing
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