Kim Gracia, Choi In-Mook
Mechanical Metrology Group, Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, South Korea.
Rev Sci Instrum. 2023 Sep 1;94(9). doi: 10.1063/5.0163714.
In this paper, we present research on the development of SQUID (Superconducting QUantum Interference Device) detection technology for a superconducting gravimeter (SG), aiming to achieve precise real-time measurements of gravity. We provide an introduction to the composition and internal details of the SQUID-based superconducting gravimeter (SSG). The internal components of the SSG are designed based on theoretical calculations to optimize the system and enhance its sensitivity. With the current in the levitation coil set to persistent mode, a unique proof mass is levitated through electromagnetic force. We demonstrate the equilibrium position of the levitated proof mass by assessing the change in the coil inductance. Furthermore, we present preliminary experimental results of earth tidal measurements using the developed SQUID detection technology and compare these outcomes with measurements from an absolute gravimeter (FG5X) and with theoretical calculations. These comparisons confirm the potential of the proposed new gravity measurement technology.
在本文中，我们展示了关于用于超导重力仪（SG）的超导量子干涉装置（SQUID）检测技术发展的研究，旨在实现重力的精确实时测量。我们介绍了基于SQUID的超导重力仪（SSG）的组成和内部细节。SSG的内部组件基于理论计算进行设计，以优化系统并提高其灵敏度。在将悬浮线圈中的电流设置为持续模式的情况下，通过电磁力使一个独特的检验质量悬浮起来。我们通过评估线圈电感的变化来证明悬浮检验质量的平衡位置。此外，我们展示了使用所开发的SQUID检测技术进行地潮测量的初步实验结果，并将这些结果与绝对重力仪（FG5X）的测量结果以及理论计算结果进行比较。这些比较证实了所提出的新重力测量技术的潜力。
