摘要
结合小尺寸CdZnTe半导体探测器,设计了结构紧凑的低噪声多相流γ射线过程成像探测系统,系统采用五个能量为59.5keV的241Am源均布在PVC管空间的结构,数据采集系统采用基于FPGA技术,将采集数据传给上位机进行处理和图像重建。测试结果显示,多相流过程成像系统每个通道的总噪声大约为8.9keV FWHM,计数能力约为90kcps。
A compact low noise multi-flow detector system for gamma-ray tomograpy matched to small size CAZnTe detectors has been developed, the system comprises five ^241Am gamma-ray sources at a principal energy of 59. 5keV, mounted around a PVC pipe structure. , the DAQ system based FPGA technique transmits the data acquired by linear array to up-PC, and then the data can be processed to reconstruct the image of the measurement volume, the test result shows the each channel＇s total noise of multi-flow tomography system is about 8.9keV FWHM ,and its count rate capability, is about 90kcps.
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2009年第3期554-557,共4页
Nuclear Electronics & Detection Technology
基金
国家自然科学基金资助项目(60532020
60472077
60820106002)
国家自然科学基金委员会与中国民用航空总局联合资助项目(60672170)
中国民航大学科研启动基金资助(06QD07X)项目
