Real-time source localisation by passive, fast-neutron time-of-flight with organic scintillators for facility-installed applications
Real-time source localisation by passive, fast-neutron time-of-flight with organic scintillators for facility-installed applications
复制标题
通过有机闪烁体的被动快中子飞行时间进行实时源定位,用于设施安装的应用
DOI:
10.1016/j.nima.2021.165094
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Astromskas V
中科院分区:
文献类型:
--
作者:
Astromskas V
Fast neutron time-of-flight (ToF) has been used to characterise the location of a source of a mixed radiation field. Two EJ-309 organic scintillators and a fast, digital, data acquisition system have been used in a variety of positions to identify the location of a 252 Cf neutron source inside a steel, water-filled tank. A methodology for extracting the distance between the neutron source and the neutron detector has been developed and verified with MCNP simulations. A reconstruction algorithm using the ToF data has been developed. The location of the neutron source has been estimated on this basis to be within 20 cm of its known location with a spatial resolution of±7.8 cm. p-values extracted from the null test hypothesis have been estimated to be 0.975 and 0.996 for experimental and simulation data, respectively. By correctly identifying the location of the source, the potential for the system to discern between scattered and unscattered neutrons is demonstrated.
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