应用于超导重力测量的磁屏蔽系统研究  

Study of magnetic shielding system applied to superconducting gravity measurement

作　　者：牛飞飞 胡新宁[1,2] 崔春艳 王浩[1] 黄兴[1,2] 张源 王路忠 王秋良 Niu Feifei;Hu Xinning;Cui Chunyan;Wang Hao;Huang Xing;Zhang Yuan;Wang Luzhong;Wang Qulia(Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《低温与超导》2023年第2期14-19,27,共7页Cryogenics and Superconductivity

基　　金：国家自然科学基金创新研究群体项目(51721005);国家自然科学基础重大仪器开发项目(41527802)资助。

摘　　要：在高精度超导重力磁悬浮系统中,高效屏蔽外界磁场干扰是实现高精度重力测量的关键,尤其对于无处不在的地磁场干扰问题。根据不同材料的屏蔽特性,分析了地磁场对超导重力测量的影响,利用ANSYS Maxwell 3D建立了以地磁场为背景的屏蔽模型,对屏蔽体不同材料、厚度、高度、直径等关键参数进行了分析及优化,并设计了多层复合屏蔽结构,屏蔽效能可达65 dB以上,满足重力信号的高精度测量需求,研究结果对于高精度超导重力测量装置的磁屏蔽设计具有重要的实际指导意义。In high-precision superconducting gravity magnetic levitation systems, it is important to shield the external magnetic field efficiently, especially for the ubiquitous geomagnetic field. According to the shielding characteristics of different materials, a shielding model with the background of geomagnetic field was established by using ANSYS Maxwell 3D, and the key influencing factors such as materials, thickness, height and diameter were analyzed and optimized, and a multi-layer composite shielding structure was designed with a shielding effectiveness of more than 65 dB to meet the demand of high-precision gravity measurement. The research results have strong practical guiding significance for the magnetic shielding design of high-precision superconducting gravity measurement device.

关 键 词：超导 磁悬浮 重力测量 磁屏蔽 

分 类 号：P312.1[天文地球—固体地球物理学]