a cooling device

Abstract

The invention provides a cooling device for a superconducting magnet (4), the cooling device comprising: a cryogenic container (3) for accommodating the superconducting magnet (4), the cryogenic container (3) having a Coolant for cooling the superconducting magnet (4); an exhaust pipeline (14), one end of the exhaust pipeline (14) communicates with the cryogenic container (3), and the other end communicates with the external environment; the The exhaust pipeline (14) is provided with a quench valve (12) that allows gas to be discharged to the external environment; a vacuum pump (16), the vacuum pump (16) is connected to the exhaust pipeline through a suction pipeline (30) The part of the passage (14) located between the quench valve (12) and the cryogenic container (3) communicates. The cooling device proposed by the invention can reduce the quench rate during exercise excitation, thereby reducing the manufacturing cost of the magnet.

Description

technical field [0001] The invention relates to a cooling device, in particular, the invention relates to a cooling device for a superconducting magnet, especially a cooling device for exercising excitation of a superconducting magnet. Background technique [0002] The critical temperature of superconductors is generally very low, and the superconducting coils used to generate the superconducting magnetic field are usually cooled in liquid helium to obtain superconducting properties, and liquid helium is a very expensive and difficult to handle refrigerant. [0003] A superconducting magnet is generally composed of a superconducting coil and a bracket. Usually, a superconducting magnet will undergo initial excitation before full excitation, or called exercise excitation. In the process of exercising excitation, a current flows through the superconducting coil, and Lorentz force is generated, so the superconducting coil will produce a slight sliding, and move from one positio...

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Problems solved by technology

[0008] The above prior art utilizes liquid helium and cold head 7 to cool the superconducting magnet 4 below the superconducting critical temperature, but the obtained temperature is not low enough. When the kinetic energy is converted into thermal energy, the temperature obtained according to the above-mentioned prior art cannot suppress the occurrence of quench, resulting in a large number of quench times during the initial tempering excitation, and multiple quenches lead to more evaporation of liquid helium. thus higher cost

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