A method for calibrating coil constants by using an atomic spin co-magnetometer

Zhang, Hong; Zou, Sheng; Chen, Xiyuan

doi:10.1140/epjd/e2016-70091-y

Cited by 21 publications

(9 citation statements)

References 22 publications

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“…, and then the mean error is figured out to illustrate the calibration accuracy [16,25]. The coil constant in the X direction is approximately 323.1 nT/mA, with a mean error of 0.28 nT/mA.…”

Section: Resultsmentioning

confidence: 99%

“…However, its accuracy is limited by the placement error and the precision of fluxgate. An in-situ method developed by Zhang et al can measure the magnetic coil constants based on the Larmor precession frequency of the hyperpolarized 3 He [16]. Chen et al proposed another calibration method by measuring the initial amplitude of free induction decay (FID) of 129 Xe and calculating the π / 2 pulse duration [17].…”

Section: Introductionmentioning

confidence: 99%

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A Coil Constant Calibration Method Based on the Phase-Frequency Response of Alkali Atomic Magnetometer

Yao

Zhao

et al. 2019

Photonic Sens

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We propose an in-situ method to calibrate the coil constants of the optical atomic magnetometer. This method is based on measuring the Larmor precession of spin polarized alkali metal atoms and has been demonstrated on a K-Rb hybrid atomic magnetometer. Oscillation fields of different frequencies are swept on the transverse coil. By extracting the resonance frequency through phase-frequency analysis of electron spin projection, the coil constants are calibrated to be 323.1 ± 0.28 nT/mA, 108 ± 0.04 nT/Ma, and 185.8 ± 1.03 nT/mA along the X, Y, and Z directions, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Coil Constant Calibration Method Based on the Phase-Frequency Response of Alkali Atomic Magnetometer

Yao

Zhao

et al. 2019

Photonic Sens

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“…1(a). 16 However, the phases of the individual magnetic moments are incoherent with each other. 9 Therefore, the net magnetization vector along the z axis is zero.…”

Section: Principlementioning

confidence: 99%

“…E. Breschi et al derived the Larmor precession frequency of Cs atoms from the FID signal to calibrate the magnetic coil constants, which can be measured by a pump-probe technique exploiting an optical pumping pulse with resonant linearly polarized light. 15 H. Zhang et al calibrated the magnetic coil constants with an atomic magnetometer, 16 which is based on the Larmor precession frequency of the hyperpolarized 3 He. Both of these methods are based on the Larmor precession frequency of atoms.…”

Section: Introductionmentioning

confidence: 99%

A method for calibrating coil constants by using the free induction decay of noble gases

et al. 2017

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We propose a precise method to calibrate the coil constants of spin-precession gyroscopes and optical atomic magnetometers. This method is based on measuring the initial amplitude of Free Induction Decay (FID) of noble gases, from which the π/2 pulse duration can be calculated, since it is inversely proportional to the amplitude of the π/2 pulse. Therefore, the coil constants can be calibrated by measuring the π/2 pulse duration. Compared with the method based on the Larmor precession frequency of atoms, our method can avoid the effect of the pump and probe powers. We experimentally validated the method in a Nuclear Magnetic Resonance Gyroscope (NMRG), and the experimental results show that the coil constants are 436.63±0.04 nT/mA and 428.94±0.02 nT/mA in the x and y directions, respectively.

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“…11,12 In situ magnetic field measurement uses the atomic spin in the vapor cell for more accurate calibration. For instance, the method based on the Larmor precession frequency of atoms, 13 and the method we proposed in 2017 relying on the FID signal of noble gases. 14 Among the mentioned methods, our method has the advantages of avoiding the effects of the pump and the probe powers, and more accurate than others in a nuclear magnetic resonance gyroscope.…”

Section: Introductionmentioning

confidence: 99%

Effects of the pulse-driven magnetic field detuning on the calibration of coil constants while using noble gases

et al. 2018

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In the calibration of coil constants using the Free Induction Decay (FID) signal of noble gases, we analyse the effects of the pulse-driven magnetic field detuning on the calibration results. This method is based on the inverse relation between the π/2 pulse duration and its amplitude. We confirmed that obtaining a precise frequency is a prerequisite for ensuring the accuracy of research using the initial amplitude of the FID signal. In this paper, the spin dynamics of noble gases and its time-domain solution under the driving pulse have been discussed with regard to different detuning ranges. Experimental results are in good agreement with our theoretical predictions, which indicate the correctness of our theoretical deduction. Therefore, the frequency of the pulse-driven magnetic field is an important factor to the calibration of coil constants, it should be determined with a high degree of accuracy.

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A method for calibrating coil constants by using an atomic spin co-magnetometer

Cited by 21 publications

References 22 publications

A Coil Constant Calibration Method Based on the Phase-Frequency Response of Alkali Atomic Magnetometer

A Coil Constant Calibration Method Based on the Phase-Frequency Response of Alkali Atomic Magnetometer

A method for calibrating coil constants by using the free induction decay of noble gases

Effects of the pulse-driven magnetic field detuning on the calibration of coil constants while using noble gases

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