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Active Magnetic-Field Stabilization with Atomic Magnetometer.
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- المؤلفون: Zhang, Rui1,2 (AUTHOR) ; Ding, Yudong2 (AUTHOR) ; Yang, Yucheng2 (AUTHOR) ; Zheng, Zhaoyu2 (AUTHOR) ; Chen, Jingbiao2 (AUTHOR) ; Peng, Xiang2 (AUTHOR) ; Wu, Teng2 (AUTHOR); Guo, Hong2 (AUTHOR)
- المصدر:
Sensors (14248220). Aug2020, Vol. 20 Issue 15, p4241-4241. 1p.
- الموضوع:
- معلومة اضافية
- نبذة مختصرة :
A magnetically-quiet environment is important for detecting faint magnetic-field signals or nonmagnetic spin-dependent interactions. Passive magnetic shielding using layers of large magnetic-permeability materials is widely used to reduce the magnetic-field noise. The magnetic-field noise can also be actively monitored with magnetometers and then compensated, acting as a complementary method to the passive shielding. We present here a general model to quantitatively depict and optimize the performance of active magnetic-field stabilization and experimentally verify our model using optically-pumped atomic magnetometers. We experimentally demonstrate a magnetic-field noise rejection ratio of larger than ∼800 at low frequencies and an environment with a magnetic-field noise floor of ∼40 fT / Hz 1 / 2 in unshielded Earth's field. The proposed model provides a general guidance on analyzing and improving the performance of active magnetic-field stabilization with magnetometers. This work offers the possibility of sensitive detections of magnetic-field signals in a variety of unshielded natural environments. [ABSTRACT FROM AUTHOR]
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