Superconducting magnet system

Abstract

The invention discloses a superconducting magnet system which comprises a low-temperature system, a superconducting coil, a current lead, a monitoring device and an excitation power source. The low-temperature system comprises a refrigerator, a cold guide bridge, a 4K radiation screen, a 40K radiation screen and a vacuum container, wherein the 4K radiation screen, the 40K radiation screen and the vacuum container are arranged from inside to outside, and a plurality of layers of heat insulating materials are filled among the 4K radiation screen, the 40K radiation screen and the vacuum container. The superconducting coil is arranged in the 4K radiation screen, the superconducting coil and the 4K radiation screen are directly connected with a secondary cold head of the refrigerator through the cold guide bridge, and the 40K radiation screen is directly connected with a primary cold head of the refrigerator. The current lead comprises a copper lead, a high temperature superconducting (HTS) lead and a heat exchange part. The high-temperature end of the copper lead is connected with the excitation power source, the low-temperature end of the copper lead and the high-temperature end of the HTS lead are connected with the heat exchange part, and the low-temperature end of the HTS lead is connected with a superconducting coil inlet-outlet line through a lead seat. A monitoring system is provided with a plurality of monitoring points so as to monitor temperature of the low-temperature system and vacuum degree of the vacuum container. The superconducting magnet system is convenient to use, simple in structure, stable in performance and convenient to maintain.

Description

technical field [0001] The invention relates to superconducting technology, in particular to a low-temperature superconducting magnet system for direct conduction cooling of a refrigerator. Background technique [0002] In the prior art, most low-temperature superconducting magnet systems often need to use liquid helium as a cooling medium, and the superconducting coil is immersed in a liquid helium Dewar to make the temperature of the superconducting coil uniform and stable. However, if the superconducting magnet system using liquid helium as the cooling medium adopts direct injection of liquid helium to cool the superconducting coil, the consumption of liquid helium is relatively large and the cost is relatively high, which will increase the cost of the low-temperature superconducting magnet system; Helium collects liquid helium, which takes a long time. This brings inconvenience to the use of the small-scale low-temperature superconducting magnet system. [0003] In add...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the object of the present invention is to provide a superconducting magnet system for direct conduction cooling of the refrigerator, so as to solve the problem that the superconducting magnet system of the prior art cannot simultaneously achieve convenient use, simple structure and stable performance and maintenance-friendly technical issues

Images