基于塑料闪烁体光纤阵列的中子探测系统设计
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摘要
为了能探测高能中子,获得中子能谱信息,设计了一套基于塑料闪烁体光纤和多路复用技术的中子探测系统。利用梯度尺寸结构的阵列化探头感应中子入射的能量和方向。多路复用数据采集及读出单元接收探测器输出信号并产生触发信号,经处理后上传给上位机。数据采集及读出系统通过以太网实现实时通信。上位机程序基于LabWindows/CVI软件平台开发,实现数据读取与保存以及采集系统运行状态参数信息的实时显示。通过中子模拟源进行了现场测试,结果表明,设计的中子探测系统满足设计要求,能实现中子能量与入射方向的测量。
In order to detect high energy neutron and obtain neutron energy spectrum information,a set of neutron detection system based on plastic scintillator fiber and multiplexing technology was designed.The gradient arrayed detector was used to sense the energy and direction of the incident neutron.The multiplexing data acquisition and reading unit received the detector output signal and generated a trigger signal,which was processed and then uploaded to the host computer.The data acquisition and readout system realized real-time communication via Ethernet.The host computer program was developed based on the LabWindows/CVI software platform,and it realized the read and save of data and the real-time display of the system running state parameter information.The neutron simulation source was tested on site.The result shows that theneutron detection system meets the design requirement and can realize the measurement of neutron energy and incident direction.
In order to detect high energy neutron and obtain neutron energy spectrum information,a set of neutron detection system based on plastic scintillator fiber and multiplexing technology was designed.The gradient arrayed detector was used to sense the energy and direction of the incident neutron.The multiplexing data acquisition and reading unit received the detector output signal and generated a trigger signal,which was processed and then uploaded to the host computer.The data acquisition and readout system realized real-time communication via Ethernet.The host computer program was developed based on the LabWindows/CVI software platform,and it realized the read and save of data and the real-time display of the system running state parameter information.The neutron simulation source was tested on site.The result shows that theneutron detection system meets the design requirement and can realize the measurement of neutron energy and incident direction.
引文
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[15]安恒,薛玉雄,杨生胜,等.星用介质材料深层充电效应仿真分析[J].核技术,2016,39(12):120502-1-120502-6.AN HENG,XUE Yuxiong,YANG Shengsheng,et al.Analysis and simulation of dielectric deep charing effect for satellites[J].Nuclear Techniques,2016,39(12):120502-1-120502-6(in Chinese).
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[2]HAJEKA M,BERGERB T,VANAA N,et al.Convolution of TLD and SSNTD measurements during the BRADOS-1experiment onboard ISS(2001)[J].Radiation Measurements,2008,43(7):1 231-1 236.
[3]杨海波,孔洁,赵红赟,等.高密度塑料闪烁体探测器的数据获取系统设计[J].原子能科学技术,2015,49(10):1 882-1 887.YANG Haibo,KONG Jie,ZHAO Hongyun,et al.Design on data acquisition system for high density plastic scintillator detector[J].Atomic Energy Science and Technology,2015,49(10):1 882-1 887(in Chinese).
[4]汲长松.中子探测实验方法[M].北京:原子能出版社,1998:86-124.
[5]AKSELROD G M,AKSELROD M S,BENTON E R,et al.A novel Al2O3fluorescent nuclear track detector for heavy charged particles and neutrons[J].Nuclear Instruments and Methods in Physics Research B,2006,247(2):295-306.
[6]王建新,杨世凤.LabWindows/CVI测试技术及工程应用[M].北京:化学工业出版社,2006.
[7]MOISEEV A,DEERING P L,HARTMAN R C,et al.High efficiency plastic scintillator detector with wavelength-shifting fiber readout for the GLAST large area telescope[J].Nuclear Instruments and Methods in Physics Research A,2007,583(2):372-381.
[8]BINDI V,CASADEI D,CASTELLINI G,et al.The scintillator detector for the fast trigger and time-of-flight(TOF)measurement of the space experiment AMS-02[J].Nuclear Instruments and Methods in Physics Research A,2010,623(3):968-981.
[9]HIRAYAMA H.Inter-comparison of the medium-energy neutron attenuation in iron and concrete(6)[C]∥Shielding Aspects of Accelerators,Targets and Irradiation Facilities.Pohang:[s.n.],2010.
[10]Mc ELROY W,BREG S,GIGAS G.Neutronflux spectral determination by foil activation[J].Nuclear Science and Engineering,1967,27(3):533-541.
[11]BRAVAR U,BRUILLARD P J,FLCKIGER E O,et al.Design and testing of a position-sensitive plastic scintillator detector for fast neutron imaging[J].IEEE Transactions on Nuclear Science,2006,53(6):3 894-3 903.
[12]MURAKI Y,KOGA K.Measurement by FIB on the ISS:Two emissions of solar neutrons detected?[J].Advances in Astronomy,2012(1):107-115.
[13]KOGA K,GOKA T.Measurement of high-energy neutrons at ISS by SEDA-AP[J].Astrophysics Space Science Transition,2011,7(3):411-416.
[14]BATTISTONI G,MURARO S.The FLUKA code:Description and benchmarking[J].IEEE Transactions on Nuclear Science,2009,56(1):2 947-2 954.
[15]安恒,薛玉雄,杨生胜,等.星用介质材料深层充电效应仿真分析[J].核技术,2016,39(12):120502-1-120502-6.AN HENG,XUE Yuxiong,YANG Shengsheng,et al.Analysis and simulation of dielectric deep charing effect for satellites[J].Nuclear Techniques,2016,39(12):120502-1-120502-6(in Chinese).
[16]FERRARI A,SALA P R,FASSO A,et al.FLUKA:A multi-particle transport code[J].Lancet,2005,7740(10):44-45.