Analysis and measurement of magnetic noise in multilayer magnetic shielding system combined with mu-metal and ferrite for atomic sensors

被引：5
作者：
Gao, Yanan [1 ]
Fang, Xiujie [1 ,2 ,3 ]
Ma, Danyue [1 ,2 ,3 ]
Sun, Bowen [1 ]
Wang, Kun [1 ]
Li, Siran [4 ]
Dou, Yao [1 ]
Zeng, Min [2 ,5 ]
机构：
[1] Beihang Univ, Sch Instrumentat & Optoelect Engn, Key Lab Ultraweak Magnet Field Measurement Technol, Minist Educ, Beijing 100191, Peoples R China
[2] Beihang Univ, Hangzhou Innovat Inst, Zhejiang Prov Key Lab Ultra Weak Magnet Field Spac, Hangzhou 310000, Peoples R China
[3] Hefei Natl Lab, Hefei 230088, Peoples R China
[4] China Acad Space Technol, Beijing 100094, Peoples R China
[5] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
来源：
MEASUREMENT | 2024年 / 233卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Multilayer magnetic shields; Magnetic noise measurement; MnZn ferrite; Particle swarm optimization;
D O I：
10.1016/j.measurement.2024.114745
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The multilayer magnetic shielding system is widely used in atomic sensors. However, for miniaturized atomic sensors with volume limitations, such as spin-exchange relaxation-free (SERF) gyroscopes, the remaining environmental magnetic interference and mu-metal magnetic noise will affect the sensitivity of atomic sensors. In this study, we establish a comprehensive magnetic noise calculation model for the magnetic shielding system of a SERF gyroscope, which considers the influence of the environmental magnetic noise on the magnetic shielding and the coupling effect between different layers. For suppressing magnetic noise of the magnetic shielding system, the property of different ferrites was measured and compared, then the particle swarm optimization is applied to design the magnetic shielding structure. Finally, the experimental device is established for measuring performances of the magnetic shielding system per and post optimization. By comparison, radial and axial magnetic noise post optimization are decreased by 37% and 22%, respectively.
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页数：9
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