Vector Potential Coupling From Outside the Loop Through the Superconducting Shield

Vector Potential Coupling From Outside the Loop Through the Superconducting Shield
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来自环路外部通过超导屏蔽的矢量电势耦合

DOI:
10.1109/tasc.2023.3258371
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发表时间:
2023
影响因子:
1.8
通讯作者:
Daibo Masahiro
Daibo Masahiro
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Zhuoran Huang;Naoki Sunaguchi;Daisuke Shimao;Shu Ichihara;Tetsuya Yuasa;Masami Ando;兼清泰正;Daibo Masahiro

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我们测试了即使在超导管提供电磁屏蔽的情况下,麦克斯韦-洛奇效应(阿哈罗诺夫-玻姆效应的经典版本)是否也会发生。一个又长又薄的超导螺线管线圈被限制在铅管内,这样线圈末端就不会出现磁通泄漏。双半圆矢量势线圈确保:1)次级线圈铜线处不存在局部磁场;2)次级线圈环路内部不存在磁通。磁芯使用了三种具有不同磁导率的不同材料。由引线管屏蔽的同轴线次级线圈垂直于初级线圈的半圆中心放置。次级线圈在 4.2 K 时产生的电压仅降低至 300 K 的约 1/10。初级线圈和次级线圈之间的这种耦合是矢量势造成的,因为即使使用超导屏蔽也无法完全屏蔽。
We tested whether the Maxwell-Lodge effect, a classical version of the Aharonov-Bohm effect, occurs even when electromagnetic shielding is provided by a superconducting tube. A long, thin superconducting solenoid coil was confined inside a lead tube so that there was no flux leakage from the coil ends. The double semi-circular vector potential coils ensure that 1) there is no local magnetic field at the location of the copper wire in the secondary coil and 2) there is no magnetic flux inside the loop of the secondary coil. Three different materials with different permeability were used for the core. A coaxial wire secondary coil shielded by a lead tube was placed orthogonally to the center of the semicircle of the primary coil. The voltage generated in the secondary coil at 4.2 K was only reduced to about 1/10 of 300 K. This coupling between the primary and secondary coils is due to the vector potential, since it cannot be completely shielded even with a superconducting shield.
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