Bertrand F, Jager T, Boness A, Fourcault W, Le Gal G, Palacios-Laloy A, Paulet J, Léger J M
University Grenoble Alpes, CEA, Leti, F-38000 Grenoble, France.
Rev Sci Instrum. 2021 Oct 1;92(10):105005. doi: 10.1063/5.0062791.
Low intrinsic noise, high bandwidth, and high accuracy vector magnetometers are key components for many ground or space geophysical applications. Here, we report the design and the test of a He vector optically pumped magnetometer specifically dedicated to these needs. It is based on a parametric resonance magnetometer architecture operated in the Earth magnetic field with closed-loop compensation of the three components of the magnetic field. It provides offset-free vector measurements in a ±70 μT range with a DC to 1 kHz bandwidth. We demonstrate a vector sensitivity up to 130 fT/√Hz, which is about ten times better than the best available fluxgate magnetometers currently available for the same targeted applications.
低固有噪声、高带宽和高精度矢量磁力仪是许多地面或空间地球物理应用的关键部件。在此，我们报告一种专门针对这些需求设计和测试的氦矢量光泵磁力仪。它基于一种在地球磁场中运行的参数共振磁力仪架构，对磁场的三个分量进行闭环补偿。它在±70 μT范围内提供无偏移矢量测量，带宽为直流至1 kHz。我们展示了高达130 fT/√Hz的矢量灵敏度，这比目前用于相同目标应用的最佳磁通门磁力仪的灵敏度高出约十倍。
