Magnetic shielding property for cylinder with circular, square, and equilateral triangle holes  

作　　者：Si-Yuan Hao Xiao-Ping Lou Jing Zhu Guang-Wei Chen Hui-Yu Li 郝思源;娄小平;祝静;陈广伟;李慧宇(Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument,Beijing 100192,China;Beijing Laboratory of Optical Fiber Sensing and System,Beijing Information Science&Technology University,Beijing 100016,China;Beijing Key Laboratory of Optoelectronic Measurement Technology,Beijing Information Science&Technology University,Beijing 100192,China)

机构地区：[1]Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument,Beijing 100192,China [2]Beijing Laboratory of Optical Fiber Sensing and System,Beijing Information Science&Technology University,Beijing 100016,China [3]Beijing Key Laboratory of Optoelectronic Measurement Technology,Beijing Information Science&Technology University,Beijing 100192,China

出　　处：《Chinese Physics B》2021年第6期255-260,共6页中国物理B（英文版）

基　　金：supported by the Key Projects of the National Natural Science Foundation of China (Grant No. 51535002);the Programme of Introducing Talents of Discipline to Universities (Grant No. D17021)。

摘　　要：The shielding property of cylinder with circular, square, and equilateral triangle holes was investigated by finite element analysis(FEA). The hole area(S_(hole)) plays an important role in magnetic circuit on the surface of cylinder. When Sholeis less than the critical area(S_(H)), cylinder with three shapes of holes obtained the same remanent magnetization inside,indicating that the shielding property is unaffected by the shape of the hole. Hence, high-permeability material is the major path of the magnetic field. On the condition of S_(hole)> S_(H), the sequence of the shielding property is equilateral triangle >square > circular, resulting from magnetoresistance of leakage flux in air dielectric. Besides, the anisotropy of shielding property caused by hole structural differences of the cylinder is evaluated. We find that a good shielding effectiveness is gained in the radial direction, compared with the axis direction. This research focuses on providing a theoretical support for the design of magnetic shield and improvement on the magnetic shielding ability.

关 键 词：SERF atomic magnetometer magnetic shielding HOLES finite element analysis(FEA) 

分 类 号：TN03[电子电信—物理电子学]