Manufacturing and measuring method for low temperature resistance measurement system of CICC superconductive joint

Abstract

The invention discloses a manufacturing and measuring method for a low temperature resistance measurement system of a CICC superconductive joint. Two to-be-detected superconductive joints, a U-shaped CICC conductor, a U-shaped CICC conductor with two coils, a superconductive coil formed by dense winding of Nb Ti folded yarns, a Hall sensor, and an electric potential measuring lead wire are included. The method comprises the following steps: firstly, calibrating the relation of current and a magnetic field of an entire measurement system by using the Hall sensor at a room temperature; then soaking the entire measurement system into liquid helium so as to realize low temperature work environment; inducting heavy current in the loop of the CICC conductor by changing the working current of a primary coil composed of the superconductive coil formed by dense winding of the Nb Ti folded yarns; calculating the induced current of the entire loop through voltage signals of the Hall sensor; measuring out the resistance performance of the CICC superconductive joint through voltages at the two ends of the electric potential signal measuring joints at the two ends of the joint. According to the invention, measurement to the low temperature resistance performance of a superconductive joint sample can be achieved at a lower cost, accurately and reliably.

Description

technical field [0001] The invention relates to a performance measurement system of a key component in a large-scale superconducting magnet device, in particular to a production and measurement method of a low-temperature resistance measurement system of a CICC superconducting joint. Background technique [0002] Large superconducting magnets mostly adopt the structure of cable conductor in tube (CICC). Due to the limitation of the processing length of superconducting conductors and the need for electrical connection between different superconducting magnets, superconducting joints are inevitable for large superconducting magnet devices. It is mainly used for the electrical connection between superconducting conductors and current leads, and between different superconducting conductors. Whether it is a superconducting tokamak device or a high-field superconducting magnet, a suitable CICC superconducting joint will be designed and developed according to the actual needs of th...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a manufacturing and measurement method of a low-temperature resistance measurement system for CICC superconducting joints, and to solve the problem of low-temperature resistance performance measurement of superconducting joints under the conditions of lacking a large-current superconducting magnet power supply and a liquid helium refrigerator. problem and greatly reduce the cost of testing

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