Visual low-temperature Dewar system for superconducting film magnetic-thermal characteristic tests

Abstract

The invention discloses a visual low-temperature Dewar system for superconducting film magnetic-thermal characteristic tests. The visual low-temperature Dewar system comprises a low-temperature sealed container and a Gifford-Mcmahon (GM) refrigerating machine which are in sealed fit installation with each other, a vacuum chamber which is in fit installation in the low-temperature sealed container, a GM refrigerating machine connector which is positioned above the vacuum chamber, a sample shelf for putting superconducting film samples to be tested, a heat transmission component which is connected between the GM refrigerating machine connector and the sample shelf, an external optical testing system and a laser pulse device which are respectively fit with and installed at the upper and lower ends of the low-temperature sealed container, and magnets which wrap the periphery of the low-temperature sealed container. The visual low-temperature Dewar system for superconducting film magnetic heat characteristic tests can be used for overcoming the defects such as inconvenience in use and poor application prospect in the prior art, so that the advantages of convenience in use and good application prospect are achieved.

Description

technical field [0001] The invention relates to the technical field of superconducting material testing equipment, in particular to a visualized low-temperature Dewar system for testing the magnetocaloric properties of superconducting thin films. Background technique [0002] Thin film materials, especially superconducting thin films, are becoming more and more important in high temperature superconducting tapes. The deformation or stress characteristics in the magnetic field working environment is one of the important issues that the research of high temperature superconductivity is very concerned about. [0003] Generally speaking, the electromagnetic properties of superconducting thin film materials are often correlated (coupled) with their mechanical deformation, temperature and ambient magnetic field. Therefore, it is necessary to design a device that can meet its special application environment to test its electromagnetic properties. an indispensable prerequisite. Th...

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Problems solved by technology

[0004] According to the existing literature research, up to now, there have been few studies on the force-magnetic-thermal coupling characteristics of superconducting thin films, mainly because the harsh test environment is difficult to meet. Up to now, there is no domestic superconducting thin film magnetic A low-temperature Dewar device for thermal characteristic testing and visualization, which seriously hinders the performance research of superconducting thin films in my country

[0005] In the process of realizing the present invention, the inventor found that there are at least defects such as inconvenient use and poor application prospects in the prior art

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