Borna Amir, Carter Tony R, DeRego Paul, James Conrad D, Schwindt Peter D D
Sandia National Laboratories, PO Box 5800, Albuquerque, NM 87185-1082, USA.
Kansas City National Security Campus, 2450 Alamo Ave SE, Albuquerque, NM 87106.
IEEE Trans Instrum Meas. 2019 Feb;68(2):493-501. doi: 10.1109/TIM.2018.2851458. Epub 2018 Jul 23.
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 , 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 2D current distribution, we have solved the inverse problem, using the measured magnetic field maps, and the reconstructed current distribution image is compared to that of the simulation.
我们开发了一种用于检测源自任意电流分布的磁场图的脉冲光泵磁力仪（OPM）阵列。所展示的磁源成像（MSI）系统具有24个OPM通道，数据速率为500 S/s，灵敏度为0.8 ，动态范围为72 dB。我们已使用我们的脉冲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，以测量比阵列更大区域上的磁场。捕获的磁场图与模拟结果显示出极佳的一致性。假设为二维电流分布，我们利用测量的磁场图解决了逆问题，并将重建的电流分布图像与模拟图像进行了比较。
