基于碲锌镉探测器脉冲整形电路设计

蔡欣; 肖沙里; 张流强; 陈宇晓; 曹玉琳; 蒋建

光电子技术, 2010, 30 (1): 64, 网络出版: 2010-05-31

基于碲锌镉探测器脉冲整形电路设计

Design of Pulse Shaped Circuit Based on CdZnTe Detector

论文大纲

蔡欣 ^1,*肖沙里 ¹张流强 ¹陈宇晓 ²曹玉琳 ²蒋建 ¹

作者单位

¹ 重庆大学光电技术及系统教育部重点实验室,重庆 400030

² 中国工程物理研究院电子工程研究所, 四川绵阳 621900

Sallen-Key滤波器整形放大能谱 CdZnTe CdZnTe Sallen-Key filter shape amplify energy spectra

摘要

CdZnTe晶体是性能优异的室温半导体核辐射探测新材料,针对该材料制作的探测器设计了一种脉冲整形电路。将Sallen-Key滤波器应用于核脉冲的整形中,采用高速运算放大器来设计和实现了整形电路,用较少的级数就可得到准高斯波形的输出。研究了整形电路的工作原理,测定了电路的各项技术指标。通过OrCAD仿真测试,当脉宽大于1 μs时,反冲较明显,当脉宽不大于1 μs时,几乎没有反冲。采用辐射源241 Am,得到峰值为60 keV的能谱图,能量分辨率为9.2%。

Abstract

CdZnTe crystal is a new semiconductor material which has high performance used in nuclear radiation detectors at room-temperature. A pulse shaped circuit to the CdZnTe detector is designed. Sallen-Key filter is used to shaping for nuclear pulse, it is designed by using broad-band op-amplifier and only through four stages quasi-Gauss waveform can be obtained. The working principle of the circuit is researched.The bounce back will be visible when the pulse time is greater than 1 μs.and it is not nearly exist when pulse time is less than 1 μs through simulation in OrCAD. All indexes of the circuit are determined. As shown by laboratorial test, the energy spectra is obtained and the energy resolution is 9.2% for241Am 60 keV.

参考文献

[1] . Internal electric-field-lines distribution in CdZnTe detectors measured using X-ray mapping[J]. IEEE Transactions on nuclear science, 2009, 56(3): 791-793.

[2] . Polarization studies of CdZnTe detectors using synchrotron X-ray radiation[J]. IEEE Transactions on Nuclear Science, 2008, 55(6): 3725-3730.

[3] . Pixelated CdZnTe drifts detectors[J]. IEEE Transactions on Nuclear Science, 2005, 52(5): 1975-1981.

[4] . Edge effects in pixelated CdZnTe gamma detectors[J]. IEEE Transactions on Nuclear Science, 2004, 51(5): 2412-2418.

[5] . Novel electrode geometry to improve the performance of CdZnTe detectors[J]. Nuclear Instruments and Methods in Physics Research, 1997, 403(1): 390-398.

[6] . Development of room temperature CdZnTe nuclear radiation detector[J]. Journal of Functional Materials, 2008, 11(11): 941-946.

[7] . 线性脉冲放大器[J]. 核电子学与探测技术, 1999, 19(3): 224-226.

[8] . 多模式仿核脉冲随机信号发生器研究[J]. 兰州大学学报:自然科学版, 2007, 43(3): 110-113.

[9] Huelsman L P, Allen P E. Electronic circuit analysis and design, second edition［M］.New York:Mc Graw-Hill Book Company,2000.

[10] . 谱仪放大器中滤波成形电路的一种改进设计[J]. 核电子学与探测技术, 2006, 26(5): 646-648.

蔡欣, 肖沙里, 张流强, 陈宇晓, 曹玉琳, 蒋建. 基于碲锌镉探测器脉冲整形电路设计[J]. 光电子技术, 2010, 30(1): 64. Cai Xin, Xiao Shali, Zhang Liuqiang, Chen Yuxiao, Cao Yulin, Jiang Jian. Design of Pulse Shaped Circuit Based on CdZnTe Detector[J]. Optoelectronic Technology, 2010, 30(1): 64.

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