2D visual design of permanent MRI magnets by a hybrid BEM-IEM computation

Author

Jinfeng Tian ; Xiaohua Jiang

Author_Institution

Dept. of Electr. Eng., Tsinghua Univ., Beijing, China

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

887

Lastpage

889

Abstract

A hybrid boundary element method (BEM)-integral equation method (IEM) computation is proposed for the two-dimensional (2D) design of permanent MRI magnets. Over the finite element method (FEM), the hybrid BEM-IEM computation has the advantages of much less discrete elements and thus less computer memory and CPU time. As the curved shape of the ferromagnetic pole planes of permanent MRI magnets plays an important role in improving the uniformity of the magnetic field, a computer program using the hybrid computation is developed to optimize the pole plane shape visually and automatically. With a 0.2T Nd-Fe-B magnet, the proposed design method is carried out and the results are given in this paper.

Keywords

boron alloys; boundary-elements methods; electrical engineering computing; integral equations; iron alloys; magnetic resonance imaging; neodymium alloys; permanent magnets; 0.2 T; 2D visual design; NdFeB; boundary element method; computer program; hybrid BEM-IEM computation; integral equation method; magnetic field; permanent MRI magnets; pole plane shape optimisation; Distributed computing; Integral equations; Iron; Laplace equations; Magnetic fields; Magnetic materials; Magnetic resonance imaging; Magnetization; Permanent magnets; Shape;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828373

Filename

828373