摘要
中国散裂中子源大气中子辐照谱仪中子能量覆盖meV—GeV,1 MeV以上能区的中子能谱及注量评估对开展大气中子单粒子效应极为重要.依托LANSCE WNR的ICE束线中子能谱实测数据,探索了适用于中高能中子能谱、注量计算的物理模型、计数方式、截面文件等,生成并验证了用于中子能谱和注量评估的具有能量分布、角度分布和空间分布的二次源项.基于此获得的中子能谱和注量,结合国际上现有同类装置及JESD89A参考中子能谱,从谱型、勒谱和辐射效应等维度评估,认为中国散裂中子源大气中子辐照谱仪可能是同类装置最接近自然条件大气中子能谱的装置;同时结合XilinxⅡ代FPGA大气中子实验,证实中国散裂中子源大气中子辐照谱仪测试结果与国际同类装置上的测试结果具有很好的一致性.为此,基于中国散裂中子源大气中子辐照谱仪开展的大气中子单粒子效应研究与工程加速试验结果可直接应用于航空、航天、军事、民用等高可靠性领域,助力新质生产力的发展.
The neutron energy spectrum and fluence of the atmospheric neutron irradiation spectrometer at China Spallation Neutron Source cover the energy range from meV to GeV.The evaluation of the neutron energy spectrum and fluence in an energy region above 1 MeV is of great significance for studying single event effect of atmospheric neutrons.Due to the limitations of the proton beam time structure of the CSNS and the engineering reality of the ANIS,it is impossible to achieve the neutron energy spectrum and fluence above 1 MeV through absolute measurements.Therefore,it is necessary to adopt a combination of theoretical simulations and partial experiments to provide reference values.This work covers the following aspects.1)Based on the measured neutron energy spectrum data from the ICE beamline at LANSCE WNR,the physical models,tally types,and cross-section data files suitable for the calculation of high energy neutron energy spectra and fluence are explored using MCNPX2.5.0;2)A secondary source with energy distribution,angular distribution,and spatial distribution for neutron energy spectrum and fluence evaluation is developed and verified.3)Using the obtained neutron energy spectrum and fluence and the combination of existing facilities and JSED89A reference neutron energy spectrum,the performance of the ANIS facility is evaluated from the perspectives of spectrum shape and radiation effect.4)An experiment on neutron induced single-event upset cross-section measurement of configuration memory on Xilinx 2nd generation FPGAs is conducted using the ANIS.The results are consistent with test results of the same chip series on similar international facilities.In summary,it can be concluded that the ANIS at CSNS may be the facility with the neutron energy spectrum closest to the natural atmospheric neutron energy spectrum among similar facilities in the world,and it has also been confirmed that the test results of ANIS from CSNS show excellent consistency with results obtained from other facilities.Therefore,the research results on atmospheric neutron single-particle effects and engineering acceleration tests based on ANIS at CSNS can be directly applied to high-reliability fields such as aviation,aerospace,military,and civil,contributing to the development of new quality productive forces.
作者
胡志良
莫莉华
周斌
易天成
李梦朝
赵齐
梁天骄
HU Zhiliang;MO Lihua;ZHOU Bin;YI Tiancheng;LI Mengchao;ZHAO Qi;LIANG Tianjiao(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Spallation Neutron Source Science Center,Dongguan 523803,China;Guangdong-Hong Kong-Macao Joint Laboratory of Neutron Scattering Science and Technology,Dongguan 523800,China)
出处
《物理学报》
北大核心
2025年第19期111-119,共9页
Acta Physica Sinica
关键词
大气中子辐照谱仪
中子能谱
中子注量
单粒子效应
atmospheric neutron irradiation spectrometer
neutron energy spectrum
neutron fluence
single event effect
