Calculation of Response Function for Bonner Sphere Spectrometer Based on Geant4  

作　　者：曹靖 蒋小菲 蒋春雨 曹宏睿 阴泽杰 

机构地区：[1]Department of Modern Physics,University of Science and Technology of China

出　　处：《Plasma Science and Technology》2015年第1期80-83,共4页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.10976028,11375195);National Magnetic Confinement Fusion Science Program of China(No.2013GB104003)

摘　　要：In order to make further studies on fusion neutron diagnosis on HL-2A /HL-2M,we have developed and succeeded in the calculation of the Response Function for a Bonner sphere spectrometer,which consists of eight polyethylene spheres with ^3He proportional counters inside.The response function of the Bonner spectrometer to neutrons is of fundamental importance for its neutron spectrum unfolding procedure and is directly related to the quality of the unfolded spectrum.In this paper,we calculated the response function to neutrons from 10^-9 MeV to100 MeV by Geant4.In order to test the accuracy of the Geant4 simulation,we apply it to measure an ^241Am-Be neutron source,and the measured neutron counts of the spectrometer and simulated counts are found to be highly consistent,with a relative error up to 9.3%.This has proven the calculation of the neutron response of the Bonner sphere spectrometer by Geant4 to be quite accurate.In order to make further studies on fusion neutron diagnosis on HL-2A /HL-2M,we have developed and succeeded in the calculation of the Response Function for a Bonner sphere spectrometer,which consists of eight polyethylene spheres with ^3He proportional counters inside.The response function of the Bonner spectrometer to neutrons is of fundamental importance for its neutron spectrum unfolding procedure and is directly related to the quality of the unfolded spectrum.In this paper,we calculated the response function to neutrons from 10^-9 MeV to100 MeV by Geant4.In order to test the accuracy of the Geant4 simulation,we apply it to measure an ^241Am-Be neutron source,and the measured neutron counts of the spectrometer and simulated counts are found to be highly consistent,with a relative error up to 9.3%.This has proven the calculation of the neutron response of the Bonner sphere spectrometer by Geant4 to be quite accurate.

关 键 词：Bonner sphere spectrometer response function Geant4 HL-2A HL-2M multi-sphere spectrometer Monte Carlo ^241Am-Be neutron source 

分 类 号：TH744.1[机械工程—光学工程]