用于便携式原子传感器的电子元件磁性表征：基于零场光泵磁力仪平台
Magnetic characterization of electronic components for portable atomic sensors using a zero-field optically pumped magnetometry platform
- rd R&D Institute, Agency for Defense Development（国防发展局第三研发研究所）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本研究提出零场光泵磁力仪平台，表征便携式原子磁力仪中光电探测器板和电阻温度检测器的磁性，评估静态磁场、噪声及畸变，为低灵敏度设计提供指导。
AI中文摘要：
我们提出了一种零场光泵磁力仪平台，用于对便携式原子磁力仪中使用的光电探测器（PD）板和电阻温度检测器（RTD）进行磁性表征。对于每个元件，沿测量轴的静态磁场通过色散响应中心的偏移来确定，而由离轴磁场分量引起的响应畸变则通过吸收性混合来评估。磁场噪声基于振幅谱密度（ASD）的正交差分进行评估。该平台实现了71.5 Hz的-3 dB带宽，以及在20-70 Hz范围内57.6 $\mathrm{fT}/\sqrt{\mathrm{Hz}}$的中位ASD。对于未通电的PD板，在前向和后向朝向下测量到大小约为8 nT、符号相反的静态磁场。后向朝向还表现出与磁场不均匀性一致的色散响应退化。与PD板相关的磁噪声贡献在前向和后向朝向下分别估计为36.0和63.2 $\mathrm{fT}/\sqrt{\mathrm{Hz}}$。相比之下，RTD读出操作产生了-0.6 nT的静态磁场，没有可测量的响应退化或额外的磁场噪声。这些结果为针对灵敏度低于0.1 $\mathrm{pT}/\sqrt{\mathrm{Hz}}$的便携式原子磁力仪中电子元件的设计和放置提供了指导。
英文摘要：
We present a zero-field optically pumped magnetometry platform for magnetic characterization of a photodetector (PD) board and a resistance temperature detector (RTD) used in a portable atomic magnetometer. For each component, the static magnetic field along the measurement axis is determined from the shift in the center of the dispersive response, while response distortion caused by off-axis magnetic-field components is assessed from the absorptive admixture. Magnetic-field noise is evaluated based on the quadrature difference in the amplitude spectral density (ASD). The platform achieved a -3 dB bandwidth of 71.5 Hz and a median ASD of 57.6 $\mathrm{fT}/\sqrt{\mathrm{Hz}}$ over 20-70 Hz. For the unpowered PD board, static magnetic fields of approximately 8 nT in magnitude and opposite signs were measured in the front- and back-facing orientations. The back-facing orientation also exhibited a degraded dispersive response consistent with magnetic-field inhomogeneity. The magnetic-noise contributions associated with the PD board were estimated at 36.0 and 63.2 $\mathrm{fT}/\sqrt{\mathrm{Hz}}$ in the front- and back-facing orientations, respectively. By contrast, operation of the RTD readout generated a static magnetic field of -0.6 nT, with no measurable response degradation or additional magnetic-field noise. These results provide guidance for the design and placement of electronic components in portable atomic magnetometers targeting sensitivities below 0.1 $\mathrm{pT}/\sqrt{\mathrm{Hz}}$.
