Device and method for measuring trapped magnetic field of block high temperature superconductor

Abstract

A device for measuring the trapped magnetic field of a block high temperature superconductor comprises a rack, a vertical moving mechanism, a two-dimensional horizontal moving mechanism, a drive and data acquisition system, a low-temperature sample container and a Hall element, wherein the vertical moving mechanism is fixed on the rack, the Hall element is fixed on the vertical moving mechanism, the two-dimensional horizontal moving mechanism is fixed on the rack and under the vertical moving mechanism, the low-temperature sample container is fixed on the two-dimensional horizontal moving mechanism, and the vertical moving mechanism and the two-dimensional horizontal moving mechanism are connected with the drive and data acquisition system respectively. A method for measuring the trapped magnetic field of the high temperature superconductor by using the device is further disclosed. The method includes fixing the Hall element on the vertical moving mechanism, and determining the distance between the Hall element and a super-conduction sample through driving the vertical moving mechanism; controlling two stepping motors to enable the sample to move horizontally relative to the Hall element; acquiring coordinate values in the horizontal direction and measurement data of the Hall element; and drawing with the acquired data to obtain trapped field data and a magnetic field distribution diagram of the super-conduction sample.

Description

technical field [0001] The invention relates to a simple measuring device for the magnetic levitation force and captured magnetic field of a bulk high-temperature superconductor. Background technique [0002] Complete diamagnetism and zero resistance effect are the main characteristics of superconducting materials. When a superconductor is in an external magnetic field, due to the effects of diamagnetism and flux pinning, a shielding current will be induced inside the superconductor, and due to the zero resistance effect, the shielding current will hardly decay with time. The magnetic field generated by the shielding current continuously flowing in the superconducting sample interacts with the external magnetic field, thereby producing superconducting magnetic levitation. The superconducting maglev technology based on the superconducting maglev phenomenon has potential application value in many fields such as energy (flywheel energy storage), transportation (maglev vehicles...

AI Technical Summary

Problems solved by technology

Although the latter can more comprehensively reflect the intrinsic characteristics of materials, it cannot be used as a routine detection method for materials due to the complex test conditions and high cost.

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