Method used for united optimization of iron shielding type superconducting magnet

A technology of joint optimization and superconducting magnets, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as high production costs, inaccurate calculation results, and no consideration of the cost of superconducting wire rods. Low cost, good shielding effect and reasonable structure

Active Publication Date: 2010-05-05
SUZHOU LONWIN MEDICAL SYST
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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 af

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  • Method used for united optimization of iron shielding type superconducting magnet
  • Method used for united optimization of iron shielding type superconducting magnet
  • Method used for united optimization of iron shielding type superconducting magnet

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Embodiment

[0037] Embodiment: A joint optimization method for iron-shielded superconducting magnets, such as figure 1 As shown, the iron-shielded superconducting magnet designed by this method for NMR imaging / spectroscopy has the structure as figure 2shown. The superconducting magnet includes two parts, the main coil and the iron screen. The main coil is composed of three pairs of solenoid coils 1 , and the iron screen is composed of the end iron screen 2 and the side iron screen 3 . Define the axis direction of the coil 1 as the Z axis, the radial direction of the coil 1 as the R axis, and the whole superconducting magnet is symmetrical about the Z axis.

[0038] A joint optimization method for iron-shielded superconducting magnets, which takes magnetic field strength, magnetic field uniformity, fugitive field range, superconducting wire consumption, and magnet weight as performance indicators, and uses a combination of finite element and simulated annealing algorithms The joint opti...

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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...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 唐昕王涛韩宝辉张琳
Owner SUZHOU LONWIN MEDICAL SYST
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