Magnetic Field Shielding With Superconductors
Magnetic Field Shielding With Superconductors
复制标题
超导体的磁场屏蔽
DOI：
10.1109/tasc.2022.3167623
复制
发表时间：
2022
影响因子：
1.8
通讯作者：
and Y. Fuwa
中科院分区：
文献类型：
--
作者：
Y. Iwashita ;Y. Kuriyama;H. Tongu;and Y. Fuwa
磁场在许多物理学研究中占有重要地位，而微小磁场的控制是许多物理实验中测量项目的重要内容。本文讨论了铌超导加速腔对弱环境磁场的屏蔽问题。铌是一种II型超导体，在超导转变过程中将环境磁通量捕获在材料中，导致剩余电阻增加，并在操作过程中发热。屏蔽弱磁场对于高性能操作至关重要。提出了一种利用超导材料的抗磁性代替高磁导率材料吸收磁通的磁屏蔽方法。
Magnetic fields occupy an important position in many physics studies, and control of minute magnetic fields is important for measurement items in many physics experiments. This article discusses shielding from faint environmental magnetic field for superconducting accelerating cavities made of niobium. Niobium is a type-II superconductor, which traps the environmental magnetic flux in the material during the superconducting transition, resulting in increase of residual resistance and heating during operation. Shielding from a weak magnetic field is essential for high performance operations. A magnetic shielding method that uses the diamagnetism of superconducting materials instead of magnetic flux absorption by high magnetic permeability materials is presented.