Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (3): 98-103.doi: 10.3969/j.issn.1000-565X.2014.03.016

• Mechanical Engineering • Previous Articles     Next Articles

Simulation Analysis of Permanent Magnetic Halbach Array for Magnetic Resonance

Zhang Guang- cai1 Liu Chao- yang2 Chen Qiao- yan1，2 Chen Fang2 Yang Xiao- dong1   

  1. 1.Suzhou Institute of Biomedical Engineering and Technology,Chinese Academy of Sciences,Suzhou 215163,Jiangsu,China;2.Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences,Wuhan 430071,Hubei,China;3.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2013-10-18 Revised:2013-12-24 Online:2014-03-25 Published:2014-02-19
  • Contact: 杨晓冬(1977-)，男，博士，研究员，主要从事核磁共振技术、脉冲优化研究． E-mail:xiaodong.yang@sibet.ac.cn
  • About author:张广才(1982-)，男，博士，助理研究员，主要从事核磁共振磁体系统设计、磁共振图像处理研究．E-mail:zhanggc@sibet．ac．cn
  • Supported by:

    国家自然科学基金资助项目(11105096);中国科学院科研装备研制项目(YZ201253);苏州市科技计划项目(SYG201125)

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Abstract:

This paper describes the principle of permanent magnetic Halbach array and the features of the corre-sponding static magnetic field,and numerically analyzes the static magnetic field of a miniaturized cylindrical Hal-bach array using for nuclear magnetic resonance with the Maxwell software.First,comparative analysis is conductedfor the magnetic induction intensities of the cylindrical Halbach array under ideal conditions with different parame-ters,such as the number of discrete magnetic blocks,the type of magnetic material and the size of magnetic blocks.Then,a comparison of the results in ideal conditions is made with those in non- ideal conditions with a magnetizationdirection error or a magnetic property error of magnetic block.Finally,a comparison is also made between Halbacharray and the conventional H- style permanent magnet.The results show that (1) the number of magnetic blocks,the magnetic material and the size of magnetic blocks are the main factors affecting the magnetic induction intensityof Halbach array; (2) the manufacturing technology,such as the selection of magnetic blocks and the magnetiza-tion,significantly affects the homogeneity of magnetic field; and (3) Halbach array is superior to the conventionalpermanent magnet in terms of material adoption and generated magnetic induction intensity.

Key words: magnetic resonance, permanent magnet, Halbach array, simulation analysis

CLC Number: