Title :
Improved halbach magnets by particle swarm optimization for mobile nuclear magnetic resonance systems
Author :
Yiyuan Cheng ; Ling Xia ; Wei He ; Minhua Zhu ; Feng Liu
Author_Institution :
Dept. of Biomed. Eng., Zhejiang Univ., Hangzhou, China
Abstract :
The Halbach magnets have been widely used in engineering especially for the mobile NMR (Nuclear Magnetic Resonance) systems. The homogeneity of the magnetic field generated by the magnet affects the imaging quality of NMR. In this paper, we have proposed two improved 2D constructions of the Halbach magnet, which can improve the magnetic field uniformity greatly. The improved constructions of Halbach magnet are optimized by the modified PSO (particle swarm optimization) algorithm and the simulations are based on the 2D Finite Element Method (FEM) analysis.
Keywords :
finite element analysis; nuclear magnetic resonance; particle swarm optimisation; permanent magnets; 2D finite element method; FEM; Halbach magnets; PSO; imaging quality; magnetic field uniformity; mobile NMR; mobile nuclear magnetic resonance systems; particle swarm optimization; Magnetic domains; Magnetic resonance imaging; Magnetic separation; Nuclear magnetic resonance; Optimization; Superconducting magnets; 2D FEM; NMR; halbach; homogeneous magnetic field; modified PSO algorithm; permanet magnet;
Conference_Titel :
Natural Computation (ICNC), 2013 Ninth International Conference on
Conference_Location :
Shenyang
DOI :
10.1109/ICNC.2013.6818084
