Tokamak fusion neutron spectrometer based on PXI bus  

作　　者：蒋小菲 曹靖 蒋春雨 曹宏睿 宋先瑛 阴泽杰 

机构地区：[1]State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China [2]Department of Modern Physics,University of Science and Technology of China [3]Southwestern Institute of Physics

出　　处：《Nuclear Science and Techniques》2014年第4期42-45,共4页核技术（英文）

基　　金：Supported by Ministry of science and technology major projects(No.2013GB104003);National Natural Science Foundation of China(No.11375195);Ministry of Education and Youth Innovation Fund(No.WK2030040037)

摘　　要：In order to realize on-line real-time measurement of dynamic and time-sharing neutron spectrum of HL-2A,a tokamak fusion neutron spectrometer based on PXI bus was developed.It consists of electronics system and eight thermal neutron detectors,namely SP9~3He proportional counter,embedded in eight polyethylene spheres in different diameters.Response function of the eight polyethylene spheres was the key to calculate the neutron spectrum accurately.In this paper,response function of the eight polyethylene spheres is simulated by adopting Geant4 code,and neutron counts from an^(241)Am-Be neutron source are measured by the eight detectors.The calculated spectrum of the Am-Be neutron is accurate in 0-2 MeV region,and is similar to the theoretical spectrum.The tokamak fusion neutron spectrometer was used in HL-2A device to monitor the dynamic neutron spectrum of HL-2A on-line and real-time.In order to realize on-line real-time measurement of dynamic and time-sharing neutron spectrum of HL-2A,a tokamak fusion neutron spectrometer based on PXI bus was developed.It consists of electronics system and eight thermal neutron detectors,namely SP9 3He proportional counter,embedded in eight polyethylene spheres in different diameters.Response function of the eight polyethylene spheres was the key to calculate the neutron spectrum accurately.In this paper,response function of the eight polyethylene spheres is simulated by adopting Geant4 code,and neutron counts from an 241Am-Be neutron source are measured by the eight detectors.The calculated spectrum of the Am-Be neutron is accurate in 0-2 MeV region,and is similar to the theoretical spectrum.The tokamak fusion neutron spectrometer was used in HL-2A device to monitor the dynamic neutron spectrum of HL-2A on-line and real-time.

关 键 词：PXI总线 中子谱仪 托卡马克 核聚变 在线实时测量 HL-2A 中子能谱仪 GEANT4 

分 类 号：TL631.24[核科学技术—核技术及应用]