System of online temperature monitoring for high-temperature superconducting tape

Abstract

A system of online temperature monitoring for a high-temperature superconducting tape comprises a high-temperature superconducting magnet system, a conduction-cooled refrigerating system, a low-temperature Dewar system and a temperature measurer; the conduction-cooled refrigerating system comprises a refrigerator cold head, a copper conduction-cooled connecting disc and a copper conduction-cooled frame; the temperature measurer comprises a carburized ceramic temperature sensor, copper-manganese wires for measurement, a temperature transmitter, a first fiber converter, an optical fiber, a second fiber converter, a computer, a crimping copper sheet and low-temperature high-vacuum grease. The middles of the copper-manganese wires wrap a heat transfer insulating layer on the copper conduction-cooled frame. The carburized ceramic temperature sensor is directly crimped on the surface of the high-temperature superconducting tape; two ends of the carburized ceramic temperature sensor are directly fixed on the surface of the high-temperature superconducting tape by welding; gaps among the crimping copper sheet, the carburized ceramic temperature sensor and the high-temperature superconducting tape is filled with the low-temperature high-vacuum grease to assist in fixing the carburized ceramic temperature sensor and transferring heat.

Description

technical field [0001] The invention relates to a temperature monitoring system for high-temperature superconducting strips. Background technique [0002] In 1911, Dutch physicist Camerin Onnes discovered superconductors. Superconductors have unique physical properties such as zero resistance, complete diamagnetism and quantum tunneling effect. Since the discovery of superconductors, superconductivity and its applications have been one of the most active frontier research fields in contemporary science and technology. In energy, It has important application value in information, transportation, scientific instruments, medical technology, national defense and major scientific projects. [0003] Superconductivity was first discovered in mercury by Dutch physicist Onnes in 1911. It refers to the phenomenon that the resistance of a superconductor suddenly disappears when the temperature drops to a certain value. This characteristic temperature is defined as the critical trans...

AI Technical Summary

Problems solved by technology

However, the high-temperature superconducting tape, the main component of the high-temperature superconducting magnet, is generally in the environment of high voltage and strong magnetic field, which is difficult for temperature monitoring.

Especially for high-temperature superconducting magnets under the condition of conduction cooling, it is not only necessary to monitor the temperature of local overheating, but also the monitoring system itself must ensure that no external heat can be introduced casually, which will aggravate the danger of potential hot spots, because for the first The second-generation high-temperature superconducting tape, the superconducting layer of the tape itself is very thin, and the volume of the superconducting tape per unit length is small, so the heat capacity is small, and the temperature rises quickly when quenching. system quench and burn

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