Title :
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
fDate :
3/1/2000 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
