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A robust method for performance evaluation of the vapor cell for magnetometry |
| Zhi Liu(柳治)1,2, Sheng Zou(邹升)1,2, Kaifeng Yin(尹凯峰)1,2, Tao Shi(石韬)1,2, Junjian Tang(唐钧剑)1,2, and Heng Yuan(袁珩)1,2,† |
1 School of Instrumentation Science and Optoelectronics Engineering, Beihang University, Beijing 100191, China;
2 Hangzhou Innovation Institute of Beihang University, Hangzhou 310051, China |
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Abstract A robust performance evaluation method for vapor cells used in magnetometers is proposed in this work. The performance of the vapor cell determines the sensitivity of the magnetic measurement, which is the core parameter of a magnetometer. After establishing the relationship between intrinsic sensitivity and the total relaxation rate, the total relaxation rate of the vapor cell can be obtained to represent the intrinsic sensitivity of the magnetometer by fitting the parameters of the magnetic resonance experiments. The method for measurement of the total relaxation rate based on the magnetic resonance experiment proposed in this work is robust and insensitive to ambient noise. Experiments show that, compared with conventional sensitivity measurement, the total relaxation rate affected by magnetic noise below 0.9 nT, pump light frequency noise below 1.5 GHz, pump light power noise below 9%, probe light power noise below 3% and temperature fluctuation of 150 ±3 ℃ deviates by less than 2% from the noise-free situation. This robust performance evaluation method for vapor cells is conducive to the construction of a multi-channel high-spatial-resolution cardio-encephalography system.
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Received: 06 September 2022
Revised: 14 November 2022
Accepted manuscript online: 29 November 2022
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PACS:
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07.07.Df
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(Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)
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07.55.Ge
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(Magnetometers for magnetic field measurements)
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07.55.-w
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(Magnetic instruments and components)
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33.35.+r
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(Electron resonance and relaxation)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 62173020 and 62103381). |
Corresponding Authors:
Heng Yuan
E-mail: hengyuan@buaa.edu.cn
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Cite this article:
Zhi Liu(柳治), Sheng Zou(邹升), Kaifeng Yin(尹凯峰), Tao Shi(石韬),Junjian Tang(唐钧剑), and Heng Yuan(袁珩) A robust method for performance evaluation of the vapor cell for magnetometry 2023 Chin. Phys. B 32 040703
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