Production process of liquid-helium-free superconducting magnet coil framework structure

Abstract

The invention discloses a production process of a liquid-helium-free superconducting magnet coil framework structure, and solves the problem of superconducting coil quench caused by relative frictionheat production of adjacent superconducting coils in the primary excitation process of the superconducting magnet coil framework structure at the present stage. According to the technical scheme, theproduction process of the liquid-helium-free superconducting magnet coil framework structure is characterized by comprising the steps of S1, pre-fixing an insulating framework in a framework wire groove; S2, brushing a layer of epoxy resin in an auxiliary wire slot of the insulating framework, winding the superconducting wire, and coating a layer of epoxy resin on each layer of superconducting wire; and repeating the steps S1 and S2 until the superconducting coils in all the framework wire slots of the framework body are wound. According to the production process of the liquid-helium-free superconducting magnet coil framework structure, the probability of the superconducting coil quench caused by relative friction heat production between adjacent superconducting wires or between the bottom-layer superconducting wire and the insulating framework in the excitation process of the superconducting coil is reduced.

Description

technical field [0001] The invention relates to the field of a liquid helium-free superconducting magnet, in particular to a production process of a liquid helium-free superconducting magnet coil skeleton structure. Background technique [0002] Due to the shortage of liquid helium resources in my country, the liquid helium-free superconducting magnet system began to develop rapidly. The difference between the superconducting magnet system without liquid helium and the superconducting magnet system with liquid helium lies in the cooling method of the superconducting magnet. Among them, the liquid helium superconducting magnet system has a liquid helium tank for liquid helium storage, and liquid helium is injected into the liquid helium tank to control the ambient temperature of the superconducting coil; the liquid helium-free superconducting magnet system is through contact In the way of heat conduction, a metal strip for heat conduction is wound on the outside of the super...

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Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: when the above-mentioned superconducting magnet coil frame structure is applied to a superconducting magnet without liquid helium, when the vacuuming of the superconducting coil 2' is not complete, it is easy to cause the inner space of the superconducting coil 2'. Some of the gaps are not filled with epoxy resin, so that the superconducting wires 21' around these gaps are not fixed. When the superconducting coil 2' is in the excitation process, the superconducting coil 2' will be fed with a current of 500A to 1000A , so that the superconducting wire 21' in the superconducting coil 2' will all bear the Lorent magnetic force in one axial direction, and the superconducting wire 21' that is not fixed will also slip in the direction of the Lorent magnetic force, and it will be in contact with the surrounding fixed The relative friction between the superconducting wires 21' generates heat, which easily leads to the quenching of the superconducting coil 2'

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