Triaxial Alignment Magnetometer Utilizing Free-Spin Precession in the Geomagnetic Range
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arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866916617844162560 |
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| author | Jin, Ge Shi, Tao Zou, Sheng |
| author_facet | Jin, Ge Shi, Tao Zou, Sheng |
| contents | In this paper, we present a triaxial alignment magnetometer based on free-spin precession deployed in the geomagnetic range. Existing vector measurement methods often require complex optical setups, heating structures, and laser modulation. This study addresses this challenge by employing a linearly polarized probe beam to induce atomic alignment and subsequently detecting the optical polarization rotation caused by the pulsed radio frequency field. The experiment is conducted in a paraffin-coated cell without buffer gas at room temperature, containing rubidium with natural abundance. We report triaxial measurements with a static magnetic field amplitude of approximately 50 $μ{\text{T}}$ (close to Earth's magnetic field), where the noise levels for each axis are approximately 5.3 ${\text{pT/}}\sqrt{\text{Hz}}$, 4.7 ${\text{pT/}}\sqrt{\text{Hz}}$, and 9.3 ${\text{pT/}}\sqrt{\text{Hz}}$ respectively. The proposed method demonstrates a simple structure suitable for cost-effective and versatile applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_11512 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Triaxial Alignment Magnetometer Utilizing Free-Spin Precession in the Geomagnetic Range Jin, Ge Shi, Tao Zou, Sheng Atomic Physics Applied Physics In this paper, we present a triaxial alignment magnetometer based on free-spin precession deployed in the geomagnetic range. Existing vector measurement methods often require complex optical setups, heating structures, and laser modulation. This study addresses this challenge by employing a linearly polarized probe beam to induce atomic alignment and subsequently detecting the optical polarization rotation caused by the pulsed radio frequency field. The experiment is conducted in a paraffin-coated cell without buffer gas at room temperature, containing rubidium with natural abundance. We report triaxial measurements with a static magnetic field amplitude of approximately 50 $μ{\text{T}}$ (close to Earth's magnetic field), where the noise levels for each axis are approximately 5.3 ${\text{pT/}}\sqrt{\text{Hz}}$, 4.7 ${\text{pT/}}\sqrt{\text{Hz}}$, and 9.3 ${\text{pT/}}\sqrt{\text{Hz}}$ respectively. The proposed method demonstrates a simple structure suitable for cost-effective and versatile applications. |
| title | Triaxial Alignment Magnetometer Utilizing Free-Spin Precession in the Geomagnetic Range |
| topic | Atomic Physics Applied Physics |
| url | https://arxiv.org/abs/2502.11512 |