We have developed a pulsed optically pumped magnetometer (OPM) array for detecting magnetic field maps originated from an arbitrary current distribution. The presented magnetic source imaging (MSI) system features 24-OPM channels has a data rate of 500 S/s, a sensitivity of $0.8~\mathrm {pT/}\sqrt {\mathrm {Hz}} $ , and a dynamic range of 72 dB. We have employed our pulsed-OPM MSI system for measuring the magnetic field map of a test coil structure. The coils are moved across the array in an indexed fashion to measure the magnetic field over an area larger than the array. The captured magnetic field maps show excellent agreement with the simulation results. Assuming a 2-D current distribution, we have solved the inverse problem using the measured magnetic field maps, and the reconstructed current distribution image is compared with that of the simulation.

中文翻译：

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使用脉冲光泵磁强计阵列的磁源成像

我们开发了一种脉冲光泵磁强计 (OPM) 阵列，用于检测源自任意电流分布的磁场图。所提出的磁源成像 (MSI) 系统具有 24-OPM 通道，数据速率为 500 S/s，灵敏度为 $0.8~\mathrm {pT/}\sqrt {\mathrm {Hz}} $ 和动态范围72 分贝。我们采用了我们的脉冲 OPM MSI 系统来测量测试线圈结构的磁场图。线圈以索引方式在阵列上移动，以测量比阵列更大的区域上的磁场。捕获的磁场图与模拟结果非常吻合。假设是二维电流分布，我们已经使用测量的磁场图解决了逆问题，