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Response optimization of a three-axis sensitive SERF magnetometer for closed-loop operation |
| Yuanrui Zhou(周原锐)1,2, Yongze Sun(孙永泽)1,2, Xixi Wang(汪茜茜)1,2, Jianan Qin(秦佳男)1,2, Xue Zhang(张雪)3,4, and Yanzhang Wang(王言章)1,2,† |
1 Key Laboratory of Geophysical Exploration Equipment(Ministry of Education), Jilin University, Changchun 130012, China;
2 College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130012, China;
3 Department of Physics, Johannes Gutenberg-Universitat Mainz, 55128 Mainz, Germany;
4 Helmholtz-Institut, GSI Helmholtzzentrum fur Schwerioneforschung, 55128 Mainz, Germany |
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Abstract Most triaxial-vectorial magnetic field measurements with spin-exchange relaxation free (SERF) atomic magnetometer (AM) are based on the quasi-steady-state solution of the Bloch equation. However, the responding speed of these methods is greatly limited because the frequency of the modulation signal should be slow enough to ensure the validity of the quasi-steady-state solution. In this work, a new model to describe the response of the three-axis sensitive SERF AM with high modulation frequency is presented and verified. The response of alkali-atomic spin to high-frequency modulation field is further investigated by solving the Bloch equation in a modulation-frequency-dependence manner. This solution is well verified by our experiments and can offer a reference for selection of modulation frequencies. The result shows a potential to achieve a SERF AM operating in a geomagnetic field without heavy aluminum shielding when the modulation frequencies are selected properly.
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Received: 27 June 2023
Revised: 29 October 2023
Accepted manuscript online: 09 November 2023
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PACS:
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07.55.-w
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(Magnetic instruments and components)
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07.55.Ge
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(Magnetometers for magnetic field measurements)
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85.70.Sq
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(Magnetooptical devices)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 42074216). |
Corresponding Authors:
Yanzhang Wang
E-mail: yanzhang@jlu.edu.cn
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Cite this article:
Yuanrui Zhou(周原锐), Yongze Sun(孙永泽), Xixi Wang(汪茜茜), Jianan Qin(秦佳男), Xue Zhang(张雪), and Yanzhang Wang(王言章) Response optimization of a three-axis sensitive SERF magnetometer for closed-loop operation 2024 Chin. Phys. B 33 020701
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