Comprehensive influence of modulated and bias magnetic fields on an atomic magnetometer

Yin, Yan; Zhou, Binquan; Yin, Kaifeng; Tang, Junjian; Ning, Xiaolin; Han, Bangcheng; Fang, Jiancheng

doi:10.1088/1361-6501/abdb79

Cited by 6 publications

(4 citation statements)

References 27 publications

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“…To reduce the influence of optical power, the intensity of the pumping beam is attenuated to about 0.2 mW cm −2 [33]. In figure 3, the relationship between the output response and the transverse scanning magnetic field in the X direction is shown with a dispersive Lorentzian line-shape in the case of different transverse DC magnetic fields at 393 K [28,34]. It is evident that the magnetic resonance linewidth is broadened as the DC magnetic field increases, while the peak-to-peak of the response curves decreases.…”

Section: Zero-field Magnetic Resonance Methodsmentioning

confidence: 99%

“…When scanning B x0 across-over zero, the output signal of the first harmonic component at the modulation frequency ω is extracted using a lock-in amplifier, and then the corresponding resonance linewidth can be obtained by fitting the dispersion Lorentzian function. Furthermore, the relationship between the zero-field resonance linewidth and the applied DC magnetic field can be expressed by a quadratic function [28]. It can be also found that the quadratic coefficient a is inversely proportional to the alkali metal density.…”

Section: Theorymentioning

confidence: 96%

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Accurate determination of alkali atom density based on zero-field magnetic resonance in a single-beam spin-exchange relaxation-free atomic magnetometer

Ma¹,

chen²,

Zhao³

et al. 2022

Meas. Sci. Technol.

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A single-beam spin-exchange relaxation-free (SERF) atomic magnetometer can extract vector magnetic field information by detecting the transmission intensity of a resonant circularly polarized pumping beam, which depends sensitively on the atomic density of the alkali metal. We present a novel scheme to determine atomic density based on zero-field magnetic resonance. The resonance linewidth under different transverse DC magnetic fields is fitted by means of a quadratic function. The atomic density can be extracted from the quadratic coefficients of the fitted function. The experimental results indicate that the deviation of measured density is less than two times compared with the theoretical values between 378 K and 403 K. Furthermore, the influence of modulation field on resonance linewidth is investigated experimentally and theoretically. A miniature single-beam SERF atomic magnetometer with a sensor head volume of only 16.2 cm3 and the measuring sensitivity of 40 fT/ Hz1/2 has been achieved. These results should be beneficial for guiding the development of a chip-scale atomic magnetometer with high sensitivity and spatial resolution for bio-magnetic field imaging applications.

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Section: Zero-field Magnetic Resonance Methodsmentioning

confidence: 99%

Section: Theorymentioning

confidence: 96%

Accurate determination of alkali atom density based on zero-field magnetic resonance in a single-beam spin-exchange relaxation-free atomic magnetometer

Ma¹,

chen²,

Zhao³

et al. 2022

Meas. Sci. Technol.

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show abstract

“…Magnetic field shielding is used in a wide range of applications, such as transmission circuits, electric vehicles, electronic components, and aerospace [11]. At present, with the development of material technology, some nano-materials with magnetic field shielding characteristics have been developed [12][13][14]. Woven products with electromagnetic shielding effects have also been developed in the textile field [15].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Field Analysis and Optimization of the Gauge of Hybrid Maglev Needles

et al. 2023

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Compared with the traditional needle driving method, hybrid maglev needle driving is a new weft knitting machine technology, which alleviates the problems of noise, heat, and needle breakage. However, in the structure of needle arrays, magnetic disturbance between permanent magnet knitting needles leads to unstable needle control. Therefore, this paper attempts to solve this problem through a performance analysis of hybrid maglev needle driving. Based on the structure, the magnetic force distribution model of permanent magnet knitting needles is established. Aiming at the magnetic interference between magnetic arrays, a magnetic shielding material, silicon steel with a high permeability, is proposed to optimize the driving structure of a magnetic levitation needle array. Through simulation and experimental analysis, the influence of different silicon steel thicknesses on magnetic field shielding is analyzed. It is concluded that the optimal value of a silicon steel sheet is 1 mm and that the optimal gauge of hybrid maglev knitting needles is 8 mm. Finally, compared with the theoretical and simulation analysis, the experimental results have indicated that the proposed optimized structure of the gauge of hybrid maglev knitting needles is correct and effective.

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“…In the SERF regime, the atomic spins precess with the same frequency and relax with the same rate, so the evolution of atomic spins can be described by a simple Bloch equation: 31,32)…”

mentioning

confidence: 99%

A high sensitivity and strong stability miniaturized optically-pumped magnetometer

Wu¹,

Zhang²,

He³

et al. 2022

Jpn. J. Appl. Phys.

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In this paper, we focus on the phase noise in atomic magnetometer systems and investigate its sources, and use dual-phase lock-in technique to solve the problem. The results show that the phase noise is maximum when the system operates under zero-magnetic-field condition, and the main source comes from the environment stray magnetic field. The dual-phase lock-in technique improves the phase noise rejection by a factor of 10 compared to the single-phase lock-in technique. The sensitivity of the system is 22fT/√Hz and the bandwidth is 158Hz, which offers a favorable outlook for use in clinical settings.

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Comprehensive influence of modulated and bias magnetic fields on an atomic magnetometer

Cited by 6 publications

References 27 publications

Accurate determination of alkali atom density based on zero-field magnetic resonance in a single-beam spin-exchange relaxation-free atomic magnetometer

Accurate determination of alkali atom density based on zero-field magnetic resonance in a single-beam spin-exchange relaxation-free atomic magnetometer

Magnetic Field Analysis and Optimization of the Gauge of Hybrid Maglev Needles

A high sensitivity and strong stability miniaturized optically-pumped magnetometer

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