English

应用科学学报 ›› 1994, Vol. 12 ›› Issue (2): 171-178.

• 论文 • 上一篇    下一篇

提高磁场均匀度的方法

许澎均1, 徐幼鹏1, 金汴骏2, 张义炳1, 史泰华1, 陆裕清1   

  1. 1. 上海科学技术大学;
    2. 中国科学院国际材料物理中心
  • 收稿日期:1992-07-06 修回日期:1992-12-11 出版日期:1994-06-30 发布日期:1994-06-30
  • 基金资助:
    中国科学院物理研究所磁学国家重点实验室资助

METHODS OF IMPROVING THE EVENNESS OF MAGNETIC FIELD

XU SHUJUN1, XU YOUPENG1, JIN BIANJUN2, ZHANG YIBING1, SHI TAIHUA1, LU YUQING1   

  1. 1. Shanghai University of Science and Technolog;
    2. International Centre for Materials Physics, Academia Sinica, Shenyan
  • Received:1992-07-06 Revised:1992-12-11 Online:1994-06-30 Published:1994-06-30

PDF

102

被引次数

2

摘要： 一台一比六的核磁共振成像仪(NMR-CT)模型磁铁由永磁供能,中心场强为0.35T。在半径为0.02083m的圆柱内其均匀度为1426×10-6。改变*磁极形状,在极面的边缘增加了铁量,结果同一区域的均匀度提高到86.4×10-6。这种方法与其它方法比较,改善程度较为明显而且方法简单。

关键词: 磁场, 均匀度

Abstract: A NMR-CT magnet model with scale 1/6 is now being assembled at our laboratory.3.5kG central field is generated by permanent magnet and evenness of field within the cylinder of 0.02083m radius is 1426×10-6. In order to improve the field evenness,we changed the shape of magnetic pole,increased the iron content at the edge of pole face. Consequently,the evenness of field in the same range increases by a factor of 16.5,i.e. 86.4×10-6 is obtained.Comparing with other methods,it is very simple and showes a significant improvement in the evenness.

Key words: magnet, field evenness