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arXiv 1802.09273physics.atom-phphysics.app-phphysics.ins-det
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利用双共振磁力仪相位几何效应的矢量磁力测量

Vector Magnetometry Exploiting Phase-Geometry Effects in a Double-Resonance Alignment Magnetometer

Stuart J. Ingleby, Carolyn O'Dwyer, Paul F. Griffin, Aidan S. Arnold, Erling Riis

摘要:

双共振光泵磁力计具有动态范围宽、灵敏度高等优点,是无屏蔽磁场测量的理想仪器。使用线性偏振泵浦光在原子样品中产生对准,其在局部静态磁场中演变,并且由谐振施加场扰动驱动,调制透射光的偏振。我们首次表明,所观察到的第一和第二谐波分量的振幅和相位在传输的极化信号包含足够的信息来测量静态磁场的大小和方向。我们描述了一个实验室系统,这些影响的实验测量和验证所观察到的信号的理论推导。我们演示了不同静态场方向下的矢量场跟踪,并表明可以同时观察静态场幅度和方向,在最敏感的场方向上实验实现的分辨率为1.7 pT和0.63 mrad。

英文摘要:

Double-resonance optically pumped magnetometers are an attractive instrument for unshielded magnetic field measurements due to their wide dynamic range and high sensitivity. Use of linearly polarised pump light creates alignment in the atomic sample, which evolves in the local static magnetic field, and is driven by a resonant applied field perturbation, modulating the polarisation of transmitted light. We show for the first time that the amplitude and phase of observed first- and second-harmonic components in the transmitted polarisation signal contain sufficient information to measure static magnetic field magnitude and orientation. We describe a laboratory system for experimental measurements of these effects and verify a theoretical derivation of the observed signal. We demonstrate vector field tracking under varying static field orientations and show that the static field magnitude and orientation may be observed simultaneously, with experimentally realised resolution of 1.7 pT and 0.63 mrad in the most sensitive field orientation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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