Magnetic field shielding system and magnetic field shielding equipment based on closed superconducting coil group

Abstract

The invention provides a magnetic field shielding system which comprises two first-level superconducting coils and two second-level superconducting coils. The first-level superconducting coils and the second-level superconducting coils are coaxially arranged around a center symmetry axis. The size of the first-level superconducting coils is different from that of the two second-level superconducting coils. A first coil group is formed by one first-level superconducting coil and one second-level superconducting coil. A second coil group is formed by the other first-level superconducting coil and the other second-level superconducting coil. The first coil group and the second coil group are insulated and are in mirror symmetrical arrangement. A closed loop is formed by the first-level superconducting coil and the second-level superconducting coil in each of the coil groups. The invention further provides a magnetic field shielding device. According to the system, the technological realization line is simple, and the engineering practice is facilitated.

Description

technical field [0001] The invention belongs to the field of superconducting electrical engineering, in particular to a passive offsetting magnetic field shielding system based on a closed superconducting coil group and its application. Background technique [0002] Magnetic field shielding is a common support technology for many precision sciences, and it is widely cited in some extreme measurement environments: such as high-precision atomic clock electron beam imaging devices, mass spectrometers, and neutrino detection. In addition to these extreme measurement applications, the measurement technology that is closest to daily life and brings benefits to human health is biomagnetic measurement. Magnetic heart and brain magnetometry have begun to gradually move from the laboratory to the clinic. With the increasingly complex electromagnetic environment, magnetic shielding technology plays an important role in the field of biomagnetic measurement technology. In biomagnetic m...

AI Technical Summary

Problems solved by technology

[0004] However, the shielding device must be based on the structure of the Helmholtz coil group, which requires four coils to be connected, and the spatial topology that can provide magnetic shielding is single, and it is only for the protection of the nearly spherical shim region.

In addition, the process of obtaining the coil radius ratio and turns ratio in the shielding device is very cumbersome, and the process of connecting the four coils is very complicated, which is not conducive to engineering practice

Images