NMR Magnetometer Based on Dynamic Nuclear-Polarization for Low-Strength Magnetic Field Measurement
Nuclear magnetic resonance (NMR) magnetometers are considered due to their ability to map magnetic fields with high precision and calibrate other magnetic field measurement devices. However, the low signal-to-noise ratio of low-strength magnetic fields limits the precision when measuring magnetic fi...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/10/4663 |
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| author | Taoning Guo Wei He Cai Wan Yuxiang Zhang Zheng Xu |
| author_facet | Taoning Guo Wei He Cai Wan Yuxiang Zhang Zheng Xu |
| author_sort | Taoning Guo |
| collection | DOAJ |
| description | Nuclear magnetic resonance (NMR) magnetometers are considered due to their ability to map magnetic fields with high precision and calibrate other magnetic field measurement devices. However, the low signal-to-noise ratio of low-strength magnetic fields limits the precision when measuring magnetic fields below 40 mT. Therefore, we developed a new NMR magnetometer that combines the dynamic nuclear polarization (DNP) technique with pulsed NMR. The dynamic pre-polarization technique enhances the SNR under a low magnetic field. Pulsed NMR was used in conjunction with DNP to improve measurement accuracy and speed. The efficacy of this approach was validated through simulation and analysis of the measurement process. Next, a complete set of equipment was constructed, and we successfully measured magnetic fields of 30 mT and 8 mT with an accuracy of only 0.5 Hz (11 nT) at 30 mT (0.4 ppm) and 1 Hz (22 nT) at 8mT (3 ppm). |
| first_indexed | 2024-03-11T03:21:53Z |
| format | Article |
| id | doaj.art-edad5936b2be498385c2a4c43ff660eb |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T03:21:53Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-edad5936b2be498385c2a4c43ff660eb2023-11-18T03:10:43ZengMDPI AGSensors1424-82202023-05-012310466310.3390/s23104663NMR Magnetometer Based on Dynamic Nuclear-Polarization for Low-Strength Magnetic Field MeasurementTaoning Guo0Wei He1Cai Wan2Yuxiang Zhang3Zheng Xu4School of Electrical Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Electrical Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Electrical Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Electrical Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Electrical Engineering, Chongqing University, Chongqing 400044, ChinaNuclear magnetic resonance (NMR) magnetometers are considered due to their ability to map magnetic fields with high precision and calibrate other magnetic field measurement devices. However, the low signal-to-noise ratio of low-strength magnetic fields limits the precision when measuring magnetic fields below 40 mT. Therefore, we developed a new NMR magnetometer that combines the dynamic nuclear polarization (DNP) technique with pulsed NMR. The dynamic pre-polarization technique enhances the SNR under a low magnetic field. Pulsed NMR was used in conjunction with DNP to improve measurement accuracy and speed. The efficacy of this approach was validated through simulation and analysis of the measurement process. Next, a complete set of equipment was constructed, and we successfully measured magnetic fields of 30 mT and 8 mT with an accuracy of only 0.5 Hz (11 nT) at 30 mT (0.4 ppm) and 1 Hz (22 nT) at 8mT (3 ppm).https://www.mdpi.com/1424-8220/23/10/4663NMRpre-polarizationlow magnetic field measurement |
| spellingShingle | Taoning Guo Wei He Cai Wan Yuxiang Zhang Zheng Xu NMR Magnetometer Based on Dynamic Nuclear-Polarization for Low-Strength Magnetic Field Measurement Sensors NMR pre-polarization low magnetic field measurement |
| title | NMR Magnetometer Based on Dynamic Nuclear-Polarization for Low-Strength Magnetic Field Measurement |
| title_full | NMR Magnetometer Based on Dynamic Nuclear-Polarization for Low-Strength Magnetic Field Measurement |
| title_fullStr | NMR Magnetometer Based on Dynamic Nuclear-Polarization for Low-Strength Magnetic Field Measurement |
| title_full_unstemmed | NMR Magnetometer Based on Dynamic Nuclear-Polarization for Low-Strength Magnetic Field Measurement |
| title_short | NMR Magnetometer Based on Dynamic Nuclear-Polarization for Low-Strength Magnetic Field Measurement |
| title_sort | nmr magnetometer based on dynamic nuclear polarization for low strength magnetic field measurement |
| topic | NMR pre-polarization low magnetic field measurement |
| url | https://www.mdpi.com/1424-8220/23/10/4663 |
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