Low AC loss superconductor used for superconducting magnet and manufacturing method thereof

Abstract

A low AC loss electrical conductor includes a plurality of single-filament superconducting strands longitudinally wound about one another. An insulative housing surrounds the plurality of single-filament superconducting strands.

Description

technical field [0001] The present invention relates generally to superconducting magnet systems, and more particularly to superconducting magnets operating in an alternating current (AC) environment. Background technique [0002] In one example, an MR system includes a cold mass that includes a superconducting magnet, a field coil support structure, and a helium vessel. Those skilled in the art will appreciate that the liquid helium contained in the helium vessel provides cooling for the superconducting magnet and keeps the superconducting magnet at a cryogenic temperature for superconducting operation. The liquid helium approximately and / or substantially maintains the superconducting magnet at the liquid helium temperature of 4.2 Kelvin (K). For thermal insulation, the helium vessel containing liquid helium comprises, in one example, a pressure vessel within a vacuum vessel. [0003] MR superconducting magnets typically consist of several coils, a set of primary coils pr...

AI Technical Summary

Problems solved by technology

That is, when a superconducting coil is exposed to an AC field, hysteresis losses and eddy currents are induced therein leading to AC losses that can raise the conductor temperature and possibly lead to quenching

AC losses also increase the overall heat load on the refrigeration system

Increased heat loads require additional low-temperature cooling capacity, which increases operating costs

Images