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A conduction-cooled magnet based on rebco superconducting ring

A technology of conduction cooling and superconducting rings, which is applied in the direction of superconducting magnets/coils, magnetic objects, magnetic films to substrates, etc., and can solve the problems of complex cooling systems, lower cooling temperatures, and high costs

Inactive Publication Date: 2020-10-27
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For immersion cooling, the cooling medium currently used is generally liquid nitrogen or liquid helium, and the cooling temperature is 77K or 4.2K respectively, so it is difficult to reduce the cooling temperature below 4.2K, and the cooling cost is very high
For large-scale low-temperature superconducting and high-temperature superconducting devices, the cooling system is complex and expensive

Method used

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  • A conduction-cooled magnet based on rebco superconducting ring
  • A conduction-cooled magnet based on rebco superconducting ring
  • A conduction-cooled magnet based on rebco superconducting ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Prepare as attached figure 1 The specific process of the ReBCO superconducting sheet shown is as follows:

[0043] (1) Using the same substrate material as the second-generation high-temperature superconducting coating to produce a sheet-shaped substrate 101, wherein the substrate material is Ni, NiW, Hastelloy or stainless steel;

[0044] (2) On the substrate 101, a second-generation high-temperature superconducting buffer layer preparation process is used to deposit a buffer layer 102, wherein the buffer layer is an insulating metal oxide;

[0045] (3) On the buffer layer 102, a ReBCO thin film 103 is plated on the second generation high temperature superconducting thin film coating technology;

[0046] (4) Plating a protective layer 104 on the ReBCO thin film 103 , wherein the protective layer 104 is a silver thin film protective layer or a copper thin film protective layer, that is, the ReBCO superconducting thin sheet 1 is obtained.

[0047] The preparation proce...

Embodiment 2

[0049] prepared as figure 2 The specific process of the shown ReBCO superconducting ring is as follows:

[0050] in, figure 2 The specific preparation process of the ReBCO square superconducting ring piece Ⅰ shown in -a is cut with two circular holes located apart from each other:

[0051] Cut the ReBCO superconducting sheet obtained in Example 1 into a square sheet with a length of a and a width of b, and then cut out a position with a radius of r at the preferred central position inside the square sheet 1 The first circular hole 201 and the radius r 2 The second round hole 202 of the first round hole 202, and at the same time cut out a width w 1 , with length l 1 The first slit 203 of the first, in order to communicate with the first round hole 201 and the second round hole 202, that is, as figure 2 ReBCO square superconducting ring piece Ⅰ shown in -a.

[0052] in, figure 2 The specific preparation process of the ReBCO square superconducting ring chip II shown in...

Embodiment 3

[0060] prepared as image 3 Insulation sheet as shown: cut an organic insulation film such as PPLP insulation film, kraft paper or epoxy sheet into an insulation sheet with the same shape and size as the superconducting ring sheet shown in Example 2.

[0061] in, image 3 -a is with figure 2 - ReBCO square superconducting ring piece Ⅰ shown in -a and square insulation piece Ⅴ with the same shape and size; image 3 -b for the same figure 2 The ReBCO square superconducting ring piece II shown in -b has the same shape and size as the square insulating piece VI; image 3 -c for the same figure 2 The shape and size of the ReBCO racetrack-shaped superconducting ring piece III shown in -c are exactly the same as the racetrack-shaped insulating piece VII; image 3 -d for the same figure 2 The ReBCO racetrack-shaped superconducting ring sheet IV shown in -d has the same shape and size as the racetrack-shaped insulating sheet VIII.

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Abstract

The invention discloses a conductive cooling magnet based on a ReBCO superconducting ring sheet belonging to the technical field of superconducting magnet application. The conductive cooling magnet comprises N superconducting ring sheets alternately stacked and N+1 cooling sheets fixed after stacking; N superconducting rings are all square rings or runway rings. N+1 sheet cooling fin comprises a cooling part and a connecting head, wherein the upper and lower surfaces of the cooling part are coated with an insulating layer or insulating fin is arranged, the size of the cooling part is the sameas that of the superconducting ring fin, and a notch capable of avoiding the generation of eddy current is cut; The connection head is the same width as the cooling section and is used to connect therefrigerator. The invention utilizes a refrigerator to conduct cooling each superconducting ring piece, thereby cooling the whole superconducting magnet. The invention has the advantages of simple operation, high efficiency and low cost, and can meet the requirements of different operating temperatures of the superconducting magnet.

Description

technical field [0001] The invention belongs to the technical field of application of superconducting magnets, in particular to a conduction cooling magnet based on ReBCO superconducting ring sheets. Background technique [0002] With the development of high-temperature superconducting production technology, the preparation technology of ReBCO (rare earth barium copper oxide, Re is Y, Sm or Nd) coated conductor with high current density has been improved, and it is applied to the high-temperature superconducting magnet in manufacturing technology. The cooling methods currently used for high-temperature superconducting magnets are traditional immersion cooling and conduction cooling. For immersion cooling, the cooling medium currently used is generally liquid nitrogen or liquid helium, and the cooling temperature is 77K or 4.2K respectively, so it is difficult to reduce the cooling temperature below 4.2K, and the cooling cost is very high. For large-scale low-temperature su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F6/04H01F41/14H01F41/18
CPCH01F6/04H01F41/14H01F41/18
Inventor 袁茜王银顺陈浩刘明闯皮伟李继春夏芳敏
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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