A conduction-cooled superconducting magnet based on rebco-coated superconducting sheets

Abstract

The invention relates to a conduction cooling superconducting magnet based on a ReBCo coating superconducting sheet. Each superconducting sheet adopts a circular ring sheet structure; each cooling sheet is provided with a connector, on the side surface of the circular ring sheet structure, to be connected with a refrigerator; cutting seams are formed in the cooling sheet in a radial direction for avoiding generation of eddy current; the inner diameter and the outer diameter of the circular ring sheet structure of the cooling sheet and the circular ring sheet structure of the superconducting sheet are the same; the cooling sheets and the superconducting sheets are arranged alternately to form the conduction cooling superconducting magnet; flanges are arranged on the upper and lower parts of the conduction cooling superconducting magnet; and the upper and lower flanges are fixedly connected through an insulating pull rod. A G-M refrigerator is adopted to regulate low temperature; the conduction cooling superconducting magnet senses current through a flux pump technology to further generate a magnetic field; the conduction cooling superconducting magnet is simple and compact in structure, and has no limitation on the bending radius; and in addition, connector welding of the superconducting material is not required, so that the problem of connector resistance is avoided, and the heat energy loss of the superconducting magnet is lowered.

Description

technical field [0001] The invention belongs to the technical field of superconducting magnets, in particular to a conduction cooling superconducting magnet based on a ReBCO coating superconducting sheet. Background technique [0002] Superconducting technology is an important method to prepare a strong magnetic field, which is closely related to the development of modern science. Under the ultra-strong magnetic field, the structure and state of matter may change significantly, which plays an important role in discovering and understanding new phenomena and revealing new laws. [0003] In recent years, significant progress has been made in the preparation technology of ReBCO (rare earth barium copper oxide, Re is Y, Sm or Nd) coated conductors. ReBCO-coated conductors have a high critical current density and can maintain good performance at low temperatures and strong magnetic fields. High-temperature superconductors made of ReBCO-coated conductors have high reliability, l...

AI Technical Summary

Problems solved by technology

Superconducting magnets are powered by current leads. The current leads are connected from room temperature to low temperature, and the heat transfer power is large. At the same time, the Joule heat generated when the current leads are energized will also become an additional heat source, thereby increasing the operating cost of the refrigeration system.

In addition, the development of joint welding technology for superconducting materials is immature, and joint resistance is also an insurmountable problem in superconducting magnet systems.

And, due to the small n value of the high-temperature superconductor, the magnetic field attenuation is more obvious

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