Measurement of remanent magnetic moment using a torsion pendulum with single frequency modulation method

被引：4
|
作者：
Qiao, Min-Na [1 ]
Liu, Lu-Hua [1 ]
Cai, Bo-Song [1 ]
Zhang, Ya-Ting [2 ]
Wang, Qing-Lan [3 ]
Xu, Jia-Hao [4 ,5 ]
Liu, Qi [4 ,5 ]
机构：
[1] Sun Yat Sen Univ, Sch Aeronaut & Astronaut, Guangzhou 510275, Peoples R China
[2] Hubei Univ Arts & Sci, Sch Phys & Elect Engn, Xiangyang 441053, Peoples R China
[3] Hubei Univ Automot Technol, Sch Math Phys & Optoelect Engn, Shiyan 442002, Peoples R China
[4] Sun Yat Sen Univ, TianQin Res Ctr Gravitat Phys, Gravitat Wave Res Ctr CNSA, MOE Key Lab TianQin Miss, Zhuhai Campus, Zhuhai 519082, Peoples R China
[5] Sun Yat Sen Univ, Frontiers Sci Ctr TianQin, Gravitat Wave Res Ctr CNSA, Sch Phys & Astron, Zhuhai Campus, Zhuhai 519082, Peoples R China
来源：
CHINESE PHYSICS B | 2023年 / 32卷 / 05期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
remanent magnetic moment; torsion pendulum; single frequency modulation method;
D O I：
10.1088/1674-1056/acae73
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In TianQin spaceborne gravitational-wave detectors, the stringent requirements on the magnetic cleanliness of the test masses demand the high resolution ground-based characterization measurement of their magnetic properties. Here we present a single frequency modulation method based on a torsion pendulum to measure the remanent magnetic moment m(r) of 1.1 kg dummy copper test mass, and the measurement result is (6.45 +/- 0.04 (stat) +/- 0.07 (syst)) x 10(-8) A center dot m(2). The measurement precision of the mr is about 0.9 nA center dot m(2), well below the present measurement requirement of TianQin. The method is particularly useful for measuring extremely low magnetic properties of the materials for use in the construction of space-borne gravitational wave detection and other precision scientific apparatus.
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页数：5
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