Suppression of Heading Error in Bell-Bloom Atomic Magnetometer by Controlling RF Magnetic Field

IF 5.6 2区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Jun Zhu;Liwei Jiang;Jiali Liu;Xin Zhao;Chi Fang;Qi Shao;Yuntian Zou;Zhuo Wang
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Abstract

The atomic magnetometers operated in Earth-scale magnetic field are susceptible to the nonlinear Zeeman (NLZ) effect, resulting in multiple resonance peaks and heading error, which restricts their practical applications. We introduce a spin-locking method based on magnetic field modulation to overcome the NLZ effect and thus suppress the heading error in atomic magnetometers. The suppression effect of spin-locking is proportional to the amplitude of the modulation field. However, an excessively high modulation field amplitude can lead to broadening of the measurement linewidth. A novel model characterizing the linewidth for the amplitude of modulated magnetic field under different environmental magnetic field is established by considering the NLZ effect. From the test results, the novel model can more accurately predict the linewidth under different environmental magnetic fields compared with traditional models. The optimized amplitude of modulated magnetic field is obtained based on the linewidth model, and the heading error is suppressed by about 80% within the magnetic field inclination angle of 28.76°. The theory and method presented here are important for the application of magnetometers in Earth-scale magnetic field, which can suppress the heading error while keeping the linewidth unchanged.
通过控制射频磁场抑制钟罩式原子磁力计的方向误差
在地球尺度磁场中运行的原子磁强计容易受到非线性泽曼效应(NLZ)的影响,从而产生多个共振峰和方向误差,限制了其实际应用。我们引入了一种基于磁场调制的自旋锁定方法,以克服非线性泽曼效应,从而抑制原子磁强计的航向误差。自旋锁定的抑制效果与调制场的振幅成正比。然而,过高的调制场振幅会导致测量线宽变宽。考虑到 NLZ 效应,我们建立了一个新模型来描述不同环境磁场下调制磁场幅值的线宽。从测试结果来看,与传统模型相比,新模型能更准确地预测不同环境磁场下的线宽。根据线宽模型得到了优化的调制磁场幅值,在 28.76° 的磁场倾角范围内,航向误差被抑制了约 80%。本文提出的理论和方法对于磁强计在地球尺度磁场中的应用具有重要意义,它可以在保持线宽不变的情况下抑制航向误差。
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来源期刊
IEEE Transactions on Instrumentation and Measurement
IEEE Transactions on Instrumentation and Measurement 工程技术-工程:电子与电气
CiteScore
9.00
自引率
23.20%
发文量
1294
审稿时长
3.9 months
期刊介绍: Papers are sought that address innovative solutions to the development and use of electrical and electronic instruments and equipment to measure, monitor and/or record physical phenomena for the purpose of advancing measurement science, methods, functionality and applications. The scope of these papers may encompass: (1) theory, methodology, and practice of measurement; (2) design, development and evaluation of instrumentation and measurement systems and components used in generating, acquiring, conditioning and processing signals; (3) analysis, representation, display, and preservation of the information obtained from a set of measurements; and (4) scientific and technical support to establishment and maintenance of technical standards in the field of Instrumentation and Measurement.
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