Method used for united optimization of iron shielding type superconducting magnet

Abstract

The invention discloses a method used for the united optimization of an iron shielding type superconducting magnet, taking the intensity of a magnetic field, the uniformity of the magnetic field, the range of an escape field, the use quantity of a superconducting wire material and the weight of a magnet as performance measure indexes, adopting a united optimization method of combining a finite element and a simulated annealing algorithm for design and analyzing a design result by a tolerance analysis method. The design method in the invention considers a plurality of performance indexes integrally, utilizes a global optimization algorithm, avoids running into the problem of local optimization, enables the structure of the superconducting magnet to be more reasonable, has better shielding effect and lower production cost, analyzes the design result by the tolerance analysis method and can provide a theoretical guide for engineering execution.

Description

technical field [0001] The invention relates to a design method of a superconducting magnet, in particular to a joint optimization method for an iron-shielded superconducting magnet. Background technique [0002] At present, the common types of magnets are permanent magnet, normally conducting and superconducting. The superconducting magnet generates a magnetic field through the current carried by the superconducting coil wound by the superconducting wire, and uses liquid helium as the coolant. Compared with other magnet types, superconducting magnets have the characteristics of small size, light weight, and high magnetic field strength, and they are increasingly showing irreplaceable roles in nuclear physics, bioengineering, and medical research. [0003] A large fugitive magnetic field is usually formed around a superconducting magnet with a field strength as high as several Teslas. Its hazard is to generate a strong attraction to nearby ferromagnetic objects, causing var...

AI Technical Summary

Problems solved by technology

Huawei Zhao decomposed the iron screen into countless independent magnetic rings, and derived the field expansion formula of any magnetic ring under the excitation of the magnetic field generated by the main coil (Huawei Zhao, Stuart Crozier. Rapid field calculations for the effect offer magnetic material in MRI magnet design .Meas.Sci.Technol, 2002, 13:198-205), but did not consider the interaction after the surrounding magnetic ring is magnetized, the calculation results are not accurate enough

At the same time, in the design of superconducting magnets, traditional design methods usually measure their performance by indicators such as magnetic field strength, magnetic field uniformity, and fugitive field range, without considering the cost of superconducting wires, resulting in high production costs

Images