Preparation method of superconducting D-type coil for magnetic confinement fusion

Abstract

The invention relates to a preparation method of a superconducting D-type coil for magnetic confinement fusion, which comprises the following steps: A, preparation of a coil framework: processing a high-strength metal circular tube into a D-type shape to obtain the coil framework; B, coil winding: spirally winding a plurality of high-temperature superconducting strips on the coil framework side byside to form a plurality of coil winding layers, and staggering the high-temperature superconducting strips of the adjacent winding layers by a distance of 1 / 2-1 / 3 of the width of the strips; and obtaining a superconducting D-type coil blank; C, coil curing: performing epoxy resin impregnation curing or paraffin impregnation curing on the superconducting D-type coil blank to obtain the cured superconducting D-type coil; and D, armor reinforcement: wrapping the cured superconducting D-type coil with a wrapping sleeve composed of an upper half tube and a lower half tube, and performing impregnation and curing again to obtain the superconducting D-type coil. The superconducting D-type coil prepared by the method is high in percent of pass, good in current-carrying performance and high in mechanical strength, and can generate a stronger strong magnetic field in a large space.

Description

technical field [0001] The invention relates to a preparation method of a superconducting D-shaped coil for magnetic confinement fusion. Background technique [0002] Nuclear fusion energy has the advantages of abundant resources, clean and safe, and no high-radioactive nuclear waste. It is recognized as the ideal energy that is most likely to solve the future energy crisis and promote the sustainable development of human society. During the generation of fusion energy, a magnetic confinement system is usually used for the plasma to confine the position of the plasma. The poloidal magnetic field of the magnetic confinement system is the main means to ensure that the plasma current starts, climbs, flat-tops, falls, and finally ends; while the strong toroidal magnetic field is an important tool to maintain the macroscopic stability of the plasma, so the magnet is the most important tool for magnetic confinement fusion. key part of . Among them, the section of the toroidal fi...

AI Technical Summary

Problems solved by technology

The existing problems are: (1) when the long straight metal tube is bent into a D-shaped tube, the flatness of many parts on the tube (when the D-shaped tube is placed horizontally, the upper and lower parts of the bent part of the D-shaped tube) The superconducting tape will produce bending stress and strain, resulting in a decrease in its mechanical strength and current-carrying performance; in severe cases, it can lead to damage and scrapping of the superconductor

(2) During the process of winding the previous layer of flat superconducting tape on a long straight metal tube, the tape advances spirally from the beginning of the metal tube to the end. Reversed forward direction) to the beginning, that is, at the turning point of two adjacent layers, the operation of changing the direction of the helical forward direction is required, the winding operation is cumbersome, time-consuming, and the preparation efficiency is low; and when the helical forward direction is changed, it is also easy to generate stress strain, reducing the performance of superconducting tapes

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