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Winding method of nb3sn superconducting cable of large-size superconducting magnet

A technology of superconducting magnets and superconducting cables, applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve problems such as irreversible performance degradation, achieve flexible and practical design, and ensure uniform distribution , good self-supporting effect

Inactive Publication Date: 2013-02-20
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of irreversible performance degradation of the cable conductor in the niobium-three-tin tube in the prior art after multiple electromagnetic cycles, a large superconducting magnet capable of long-term stable operation was manufactured

Method used

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  • Winding method of nb3sn superconducting cable of large-size superconducting magnet

Examples

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Embodiment 1

[0024] Example 1: A method for winding a niobium-tritin superconducting cable of a large superconducting magnet, comprising the following steps:

[0025] (1) According to the working conditions of the superconducting conductor, calculate the number of superconducting strands and copper wires required, and configure the composition of the superconducting cable to ensure that the superconducting strands and copper wires are evenly distributed inside the superconducting cable;

[0026] (2) The first-level twisted cable is made of three superconducting strands or a combination of superconducting wires and copper wires to form a first-level cable, which is molded and stabilized. The torque is selected to be 33 times the diameter of the first-level cable after molded;

[0027] (3) The second-level twisted cable is made of three to four first-level cables to form a second-level cable. The same first-level cable can be used, or a mix of different components of the first-level cable c...

Embodiment 2

[0031] Example 2: Such as figure 1 As shown, the winding method of the niobium-three-tin superconducting cable of the large-scale superconducting magnet includes the following steps: the superconducting cable is wound by four-level cable twisting, and the copper wire 1 and the superconducting wire 2 are combined. Twisted to form the first class one cable 3, three superconducting wires 2 are stranded to form the second class one cable 4; four two kinds of different class one cables are mixed and matched to form a class two cable 5; Grade 5 cables are twisted into grade 3 cables 6; five grade 3 cables 6 are twisted into grade 4 cables 7, overmolded and reduced in diameter, and 50% of the surface is wrapped with 0.05mm thick 316L stainless steel strips to make a Niobium tritin superconducting cable.

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Abstract

The invention discloses a winding method of an nb3sn superconducting cable of a large-size superconducting magnet. The method comprises the following steps that: a superconducting cable is formed by winding and twisting four stage sub-cables, wherein a first-stage sub-cable is twisted by using three superconductors or a mode of combining the superconductor with a copper wire; a second-stage sub-cable is formed by twisting three or four first-stage sub-cables, and a nb3sn superconducting piled yarn and the copper wire are combined by using a mixing mode in the first-stage and second-stage sub-cables; a third sub-cable is formed by twisting three or four second-stage sub-cables; a fourth-stage sub-cable is formed by twisting three or four or five third-stage sub-cables; and the surface of the fourth-stage sub-cable is overlaid by using stainless steel with the thickness of 0.05mm so as to make the nb3sn superconducting cable. According to the invention, longer torque is adopted in the former three stages of sub-cables, and shorter torque is adopted in the last-stage sub-cable; and a cable conductor in a pipe made by using the nb3sn superconducting cable can reduce even eliminate thedeterioration of superconductor property caused by electromagnetism circulation.

Description

technical field [0001] The invention mainly relates to the technical field of superconducting magnets, in particular to a method for winding a niobium-three-tin superconducting cable of a large superconducting magnet. Background technique [0002] The cable conductor in the tube is made of niobium-titanium or niobium-three-tin superconducting wire through multi-stage twisting to form a superconducting cable, and then the superconducting cable is inserted into a stainless steel pipe, and the cable conductor in the tube is made by reducing the diameter and forming, using supercritical helium Or superfluid helium for forced flow cooling. This method increases the contact area between the superconducting wire and helium, improves the heat transfer conditions, and makes the cable conductor in the tube have the characteristics of good self-support, low AC loss, less cooling medium required, safe and reliable operation, and high performance. It has become the preferred conductor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/02H01B12/08
CPCY02E40/641Y02E40/60
Inventor 谭运飞匡光力陈文革王福堂陈灼民潘引年陈治友
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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