首页|Design and implementation of the monochromator shielding for the cold neutron spectrometers XINGZHI and BOYA

Design and implementation of the monochromator shielding for the cold neutron spectrometers XINGZHI and BOYA

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An innovative monochromator shielding is designed and implemented for the cold neutron spectrometers XlNGZHI and BOYA operated by Renmin University of China at China Advanced Research Reactor.Via Monte Carlo simulations and careful mechanical designs,a shielding configuration has been successfully developed to satisfy safety requirements of below 3 μSv/h dose rate at its exterior,meanwhile fulfilling space,floor load and nonmagnetic requirements.Composite materials are utilized to form the sandwich-type shielding walls:the inner layer of boron carbide rubber,the middle layer of steel-encased lead and the outer layer of borated polyethylene.Special-shaped liftable shielding blocks are incorporated to facilitate a continuous adjustment of the neutron energy while preventing radiation leakage.Our work has demonstrated that by utilizing composite shielding materials,along with the sandwich structure and liftable shielding blocks,a compact and lightweight shielding solution can be achieved.This enables the realization of advanced neutron scattering instruments that provide expanded space of measurement,larger energy and momentum coverage,and higher flux on the sample.This shielding represents the first of its kind in neutron scattering instruments in China.Following its successful operation,it has been subsequently employed by other neutron instruments across the country.

neutron scatteringcold neutron spectrometermonochromator shieldingsandwich shielding structure

汪晋辰、刘娟娟、徐大业、Florian Grünauer、郝丽杰、刘蕴韬、张红霞、程鹏、鲍威

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Laboratory for Neutron Scattering and Beijing Key Laboratory of Optoelectronic Functional Materials and MicroNano Devices,Department of Physics,Renmin University of China,Beijing 100872,China

Physics Consulting,Zorneding 85604,Germany

China Institute of Atomic Energy,Beijing 102413,China

Department of Physics,City University of Hong Kong,Kowloon 999077,China

Center for Neutron Scattering,City University of Hong Kong,Kowloon 999077,China

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国家自然科学基金国家自然科学基金国家自然科学基金National Key Scientific Instrument and Equipment Development Project of NSFC国家重点研发计划

12004426U203010612304185112279062023YFA1406500

2024

10.1088/1674-1056/ad3629

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(5)
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