核技术（英文版）
覈技術（英文版）
핵기술（영문판）
NUCLEAR SCIENCE AND TECHNIQUES
2015年
4期
040602-1-040602-7
,共1页
黄孟%李玉兰%牛莉博%李金%李元景
黃孟%李玉蘭%牛莉博%李金%李元景
황맹%리옥란%우리박%리금%리원경
Neutron-TPC%Energy resolution%Analytical method%Multiple Coulomb scattering
Neutron-TPC (nTPC) is a fast neutron spectrometer based on GEM-TPC (Gas Electron Multiplier-Time Pro-jection Chamber) and expected to be used in nuclear physics, nuclear reactor operation monitoring, and thermo-nuclear fusion plasma diagnostics. By measuring the recoiled proton energy and slopes of the proton tracks, the incident neutron energy can be deduced. It has higher n/γseparation ability and higher detection efficiency than conventional neutron spectrometers. In this paper, neutron energy resolution of nTPC is studied using the analytical method. It is found that the neutron energy resolution is determined by 1) the proton energy resolu-tion (σEp/Ep), and 2) standard deviation of slopes of the proton tracks caused by multiple Coulomb scattering (σk(scat ering)) and by the track fitting accuracy (σk(fit)). Suggestions are made for optimizing energy resolution of nTPC. Proper choices of the cut parameters of reconstructed proton scattering angles (θcut), the number of fitting track points (N ), and the working gas help to improve the neutron energy resolution.
