Superconducting cable and conductor critical current testing device

Abstract

The invention discloses a superconducting cable and conductor critical current testing device, which includes a back field magnet, a superconducting transformer, and a low temperature system. The low temperature system includes a Dewar and a liquid helium container arranged in the Dewar. The back field magnet and the superconducting transformer are immersed in the liquid helium in the liquid helium container. The back field magnet is suspended in the Dewar and is connected with a DC power supply through a high temperature superconducting current lead. The superconducting transformer is located above the back field magnet. A conductor sample under test is located in the back field magnet. A secondary coil of the superconducting transformer extends two pins downwards to be respectively connected to two ends of the conductor sample under test through a superconducting connector. A critical current of a superconducting cable or conductor under test can be obtained according to a quench criterion by measuring the voltage across and current through the two ends of the conductor sample under test. The back field magnet has a horizontal magnetic field direction, the sample under test can be easily perpendicular to the magnetic field direction, and the device of the invention has the advantages of high test precision, low test cost, compact device structure and so forth.

Description

[0001] Technical field: [0002] The invention relates to the technical field of superconducting testing, in particular to a superconducting cable and a conductor critical current testing device. [0003] Background technique: [0004] Superconducting conductors, especially CICC conductors, are widely used in fusion devices, high-energy particle accelerators, superconducting energy storage magnets, superconducting strong magnetic fields, etc. due to their advantages in mechanical structure, insulation performance, magnet winding process and operational safety. field. The establishment of high-current, high-back field superconducting cables and conductor testing devices can not only provide experimental and theoretical basis for the design and application of superconducting conductor structures, but also greatly improve the testing level of superconducting conductors in my country. [0005] The critical current of a superconducting conductor is an important indicator for evalua...

AI Technical Summary

Problems solved by technology

[0005] The critical current of superconducting conductors is an important indicator for evaluating the performance of superconducting conductors. However, most of the performance tests of superconducting conductors need to be done abroad, and the test cost is high and the test cycle is long.

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