Analysis and measurement of magnetic noise for tesla shielding based on superconducting coils applied to SERF magnetometer

作者：Yanan Gao, Danyue Ma, Mengchao Li, Mengshi Zhang, Yunbo Chen, Changmi Han, Yutian Wang, Xiujie Fang, Yao Dou, Kun Wang · 发表于：Measurement · 年份：2024 · DOI：10.1016/j.measurement.2024.115971 · 被引用次数：17 · 研究领域：Atomic and Subatomic Physics Research、Advanced MRI Techniques and Applications、NMR spectroscopy and applications

Tesla Shielding (TS) is closed superconducting coils composed of superconducting tape, designed to resist changing magnetic fields, thereby achieving magnetic shielding. TS, optically transparent, is suitable for integration with spin exchange relaxation-Free (SERF) magnetometers, thereby improving the sensitivity of SERF magnetometers. However, no prior research has been conducted on the magnetic noise of TS. Noise source identification was conducted on the superconducting tapes used in the TS. We modeled the magnetic noise of superconducting coils, analyzed the the relationship between geometric parameters and magnetic noise of coils, and proposed methods to suppress magnetic noise. Finally, we established a measurement system to measure the magnetic noise of superconducting coils. The results confirm the feasibility of the magnetic noise calculation model and the effectiveness of the methods for suppressing magnetic noise. This study can guide the design of TS, which is important for improving the sensitivity of SERF magnetometers.