Performance test system of low temperature superconducting stranded wire

Abstract

The invention discloses a performance test system of a low temperature superconducting stranded wire, which comprises a low temperature sealing container internally provided with a vacuum chamber, a GM (Gifford-Mcmahon) refrigerator sealed and mounted with the low temperature sealing container, a magnet coating the periphery of the low temperature sealing container, a stress loading device arranged in the vacuum chamber in the low temperature sealing container and located above a secondary refrigeration head of the GM refrigerator, and a heat transmission component arranged between the stress loading device and the GM refrigerator, wherein a test sample is placed on the stress loading device. The performance test system of the low temperature superconducting stranded wire can overcome defects of high energy consumption, complicated structure, poor practicability and the like in the prior art, and has the advantages of low energy consumption, concise structure and good practicability.

Description

technical field [0001] The invention relates to the technical field of superconducting material testing, in particular to a performance testing system for low-temperature superconducting strands. Background technique [0002] With the rapid development of science and technology, as a new type of material, superconducting materials, especially low-temperature superconducting materials Nb3Sn, NbTi, etc., are widely used in nuclear fusion devices, magnetic resonance imaging, nuclear magnetic resonance spectrometers and high-energy particle physics accelerators, etc. multiple fields. In actual working conditions, superconducting materials such as Nb3Sn and NbTi are generally in a high magnetic field environment, low temperature and constantly changing, and are subject to extreme working environments with multi-field coupling complex changes such as thermal expansion and contraction, Lorentz force and mechanical load. , all these external environmental coupling effects will lead...

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Problems solved by technology

[0003] At present, the corresponding foreign experiments have been carried out for many years, but the working environment is in a semi-closed low-temperature Dewar vessel, and the corresponding low-temperature environment is provided by the volatilization of liquid helium or liquid nitrogen, which will inevitably cause a large consumption of refrigerant , a waste of money

However, our country has not yet had a set of independent intellectual property rights testing system for superconducting properties of low-temperature superconducting materials under close working conditions. main bottleneck

[0004] According to the existing literature research, up to now, there is no complete set of performance testing system for low-temperature superconducting strands with independent intellectual property rights in China.

At the same time, the cost of the refrigerant (liquid helium) and the complexity of the testing equipment for the existing superconducting strand characteristic testing equipment in the world make it difficult to widely promote the corresponding testing research

[0005] In the process of realizing the present invention, the inventor found that there are at least some defects in the prior art, such as large energy consumption, complex structure and poor practicability.

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