期刊
APPLIED SCIENCES-BASEL
卷 12, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/app12104915
关键词
stray neutrons; energy-extended Bonner sphere spectrometer; neutron ambient equivalent dosimeter; Monte-Carlo simulations
类别
资金
- Regional Joint Fund of Guangdong [2020A1515110280]
- Guangdong-Hong Kong-Macao Joint Laboratory for Neutron Scattering Science and Technology [2019B121205003]
- Program for Guangdong Introducing Innovative and Entrepreneurial Teams [2017ZT07S225]
- Guangdong Provincial Science and Technology Plan [2017B090921001]
A measurement technique was proposed to experimentally study stray neutrons inside neutron scattering instruments at CSNS. The feasibility of the method was demonstrated through verification experiments.
Stray neutrons might cause several negative impacts. However, it is usually difficult to conduct precise stray neutron simulations using the Monte Carlo method. Therefore, in this study, a measurement technique was proposed to study the stray neutrons experimentally inside the neutron scattering instruments at China Spallation Neutron Source (CSNS). The adopted measurement instruments comprise an extended-range Bonner sphere spectrometer and a commercial neutron ambient-dose-equivalent dosimeter, which enables us to directly measure the neutron spectra and ambient-dose equivalent H*(10) values. Verification experiments were performed inside the BL06 beam line experimental area at CSNS at two exposed locations with different sample conditions. Comparison of the experimentally measured neutron spectra, integral neutron fluence, and H*(10) value with the simulations demonstrated the feasibility of using the proposed method for studying stray neutrons for the neutron instruments.
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