Results 211 to 220 of about 20,213 (251)
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Signal-enhanced spin-exchange relaxation-free atomic magnetometer
Sensors and Actuators A: Physical, 2023Junjian Tang, Yueyang Zhai, Li Cao
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Signal Space Separation for Spin-Exchange Relaxation-Free magnetometer
2021 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS), 2021Magnetoencephalography (MEG) provides a real-time, non-invasive investigation of brain activity, which is very important for deep understanding of neuroscience. But MEG signals are often contaminated by various artifacts. Signal space separation (SSS) is a technique based on quasi-static Maxwell equations and Laplace equations.
Yang Gao +5 more
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Study of the operation temperature in the spin-exchange relaxation free magnetometer
Review of Scientific Instruments, 2015We study the influence of the cell temperature on the sensitivity of the spin-exchange relaxation free (SERF) magnetometer and analyze the possibility of operating at a low temperature. Utilizing a 25 × 25 × 25 mm3 Cs vapor cell with a heating temperature of 85 ∘C, which is almost half of the value of potassium, we obtain a linewidth of 1.37 Hz and ...
Jiancheng, Fang +4 more
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Temperature compensation methods of spin-exchange relaxation-free co-magnetometer
Measurement Science and Technology, 2022Abstract According to the temperature characteristics of spin-free exchange relaxation (SERF) co-magnetometer, three temperature compensation methods are proposed in this paper, including particle swarm optimization radial basis function (PSO-RBF) neural network, Gaussian regression and least squares support vector basis.
Jiaqi Wu +4 more
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IEEE Transactions on Instrumentation and Measurement, 2021
As the measurement of multiple parameters in a spin-exchange relaxation-free (SERF) comagnetometer requires a long time and complex experimentation, we present a novel dynamic frequency response-based method for the accurate and rapid measurement of key parameters in a SERF comagnetometer.
Tian Zhao, Zitong Xu, Yueyang Zhai
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As the measurement of multiple parameters in a spin-exchange relaxation-free (SERF) comagnetometer requires a long time and complex experimentation, we present a novel dynamic frequency response-based method for the accurate and rapid measurement of key parameters in a SERF comagnetometer.
Tian Zhao, Zitong Xu, Yueyang Zhai
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Measurement of Relaxation Mechanism for the Spin-Exchange Relaxation-Free Magnetometer
IEEE Sensors JournalBei Liu, An-Ning Xu
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Design of a photoelastic modulator in the spin-exchange relaxation-free magnetometer
SPIE Proceedings, 2016The spin-exchange relaxation-free (SERF) magnetometer as an ultra-precision magnetometer has been researched during recent times. The sensitivity of the signal measurement limits the accuracy of the magnetometer. The optical modulation method is used to detect the tiny optical rotation angle of the linear polarized (LP) light, and the modulator is ...
Ye Wu, Zhaohui Hu, Lihong Duan
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IEEE Transactions on Instrumentation and Measurement, 2020
A novel method to determine the spin polarization and its distribution for a spin-exchange relaxation-free (SERF) atomic magnetometer are proposed in this paper. The Larmor precession frequency is measured using the fast Fourier transform (FFT) analysis result of the transient response of the magnetometer under the excitation of a series of the step ...
Gang Liu, Gang Liu, Jixi Lu
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A novel method to determine the spin polarization and its distribution for a spin-exchange relaxation-free (SERF) atomic magnetometer are proposed in this paper. The Larmor precession frequency is measured using the fast Fourier transform (FFT) analysis result of the transient response of the magnetometer under the excitation of a series of the step ...
Gang Liu, Gang Liu, Jixi Lu
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A fast determination method for transverse relaxation of spin-exchange-relaxation-free magnetometer
Review of Scientific Instruments, 2015We propose a fast and accurate determination method for transverse relaxation of the spin-exchange-relaxation-free (SERF) magnetometer. This method is based on the measurement of magnetic resonance linewidth via a chirped magnetic field excitation and the amplitude spectrum analysis.
Jixi, Lu, Zheng, Qian, Jiancheng, Fang
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