Influence of Atomic Magnetometer’s Orientation on Its Frequency Response
Due to the high sensitivity and room temperature operation of atomic magnetometers, they have significant applications in many fields. An emerging area is the highly sensitive biomagnetic measurement in magnetically unshielded environments, which is crucial for medical diagnostics. However, in magne...
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MDPI AG
2025-02-01
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| author | Rui Zhang |
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| description | Due to the high sensitivity and room temperature operation of atomic magnetometers, they have significant applications in many fields. An emerging area is the highly sensitive biomagnetic measurement in magnetically unshielded environments, which is crucial for medical diagnostics. However, in magnetically unshielded environments, atomic magnetometers often encounter situations where their orientation deviates from the optimal operating posture, and there has been insufficient research on the frequency response information of atomic magnetometers under such conditions. Addressing this issue, we modeled the atomic magnetometer using the Bloch equations and obtained approximate analytical solutions for the frequency response of the atomic magnetometer in different orientations, which were experimentally verified using a Bell–Bloom magnetometer. We found that although the magnetic resonance spectrum of the magnetometer is influenced by the orientation of the magnetometer, the frequency response of the magnetometer can be made independent of its orientation by judiciously selecting the demodulation components used for the operation of the magnetometer. This finding is important for biomagnetic detection in magnetically unshielded environments where orientation-robust measurements of AC magnetic signals are required. |
| format | Article |
| id | doaj-art-a51e35c888ee461da951a722e5360e62 |
| institution | DOAJ |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
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| spelling | doaj-art-a51e35c888ee461da951a722e5360e622025-08-20T02:59:01ZengMDPI AGSensors1424-82202025-02-01255136410.3390/s25051364Influence of Atomic Magnetometer’s Orientation on Its Frequency ResponseRui Zhang0National Innovation Institute of Defense Technology, AMS, Beijing 100071, ChinaDue to the high sensitivity and room temperature operation of atomic magnetometers, they have significant applications in many fields. An emerging area is the highly sensitive biomagnetic measurement in magnetically unshielded environments, which is crucial for medical diagnostics. However, in magnetically unshielded environments, atomic magnetometers often encounter situations where their orientation deviates from the optimal operating posture, and there has been insufficient research on the frequency response information of atomic magnetometers under such conditions. Addressing this issue, we modeled the atomic magnetometer using the Bloch equations and obtained approximate analytical solutions for the frequency response of the atomic magnetometer in different orientations, which were experimentally verified using a Bell–Bloom magnetometer. We found that although the magnetic resonance spectrum of the magnetometer is influenced by the orientation of the magnetometer, the frequency response of the magnetometer can be made independent of its orientation by judiciously selecting the demodulation components used for the operation of the magnetometer. This finding is important for biomagnetic detection in magnetically unshielded environments where orientation-robust measurements of AC magnetic signals are required.https://www.mdpi.com/1424-8220/25/5/1364atomic magnetometerfrequency responseorientation |
| spellingShingle | Rui Zhang Influence of Atomic Magnetometer’s Orientation on Its Frequency Response Sensors atomic magnetometer frequency response orientation |
| title | Influence of Atomic Magnetometer’s Orientation on Its Frequency Response |
| title_full | Influence of Atomic Magnetometer’s Orientation on Its Frequency Response |
| title_fullStr | Influence of Atomic Magnetometer’s Orientation on Its Frequency Response |
| title_full_unstemmed | Influence of Atomic Magnetometer’s Orientation on Its Frequency Response |
| title_short | Influence of Atomic Magnetometer’s Orientation on Its Frequency Response |
| title_sort | influence of atomic magnetometer s orientation on its frequency response |
| topic | atomic magnetometer frequency response orientation |
| url | https://www.mdpi.com/1424-8220/25/5/1364 |
| work_keys_str_mv | AT ruizhang influenceofatomicmagnetometersorientationonitsfrequencyresponse |