| Title | An actively compensated 8 nT-level magnetic shielding system for 10-m atom interferometer |
| Authors | Ji, Yu-Hang Zhou, Lin Yan, Si-Tong He, Chuan Zhou, Chao Barthwal, Sachin Yang, Feng Duan, Wei-Tao Zhang, Wen-Dong Xu, Run-Dong Wang, Qi Li, Dong-Xu Gao, Jia-Hong Chen, Xi Wang, Jin Zhan, Ming-Sheng |
| Affiliation | Chinese Acad Sci, Innovat Acad Precis Measurement Sci & Technol, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan Natl Lab Optoelect, Wuhan 430071, Peoples R China Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China Cent Iron & Steel Res Inst, Beijing 100081, Peoples R China Anhui Agr Univ, Sch Sci, Hefei 230036, Peoples R China Peking Univ, Sch Phys, Inst Heavy Ion Phys, Beijing City Key Lab Med Phys & Engn, Beijing 100871, Peoples R China |
| Keywords | GRAVITATIONAL ACCELERATION LIMIT |
| Issue Date | 1-Aug-2021 |
| Publisher | REVIEW OF SCIENTIFIC INSTRUMENTS |
| Abstract | We design and develop a high-performance magnetic shielding system for a long baseline fountain-type atom interferometer. The shielding system is achieved by a combination of passive shielding using permalloy and active compensation with coils. An 11.4 m-long three-layer cylindrical shield is completed by the process of welding, local annealing, and entire annealing. The active compensations compress the residual magnetic field to 8.0 nT max-to-min and the corresponding gradient below 30 nT/m over 10 m along the axial direction in which external compensation, internal compensation, and constant magnetic field (C-field) compensation reduce the inhomogeneities to 25.0, 12.6, and 1.7 nT (standard deviation) sequentially. We estimate that this system could reduce the systematic error of the quadratic Zeeman shift to the 10(-13) level for the weak equivalence principle test with a simultaneous Rb-85-Rb-87 dual-species atom interferometer. Published under an exclusive license by AIP Publishing. |
| URI | http://hdl.handle.net/20.500.11897/624605 |
| ISSN | 0034-6748 |
| DOI | 10.1063/5.0053971 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 医学物理和工程北京市重点实验室 |
