Halbach磁体中柱面匀场线圈的设计方法  

Design of Cylinder Shim Coils for Halbach Magnet

作　　者：赵微[1] 唐晓英[2] 刘志文[1] 

机构地区：[1]北京理工大学信息科学技术学院,北京100081 [2]北京理工大学生命科学与技术学院,北京100081

出　　处：《电工技术学报》2010年第1期6-13,23,共9页Transactions of China Electrotechnical Society

摘　　要：Halbach磁体场强高、体积小,是永磁台式核磁共振波谱仪的理想磁源。为开发高分辨永磁台式核磁共振波谱仪,需要使Halbach磁体的磁场达到高度均匀。引入在超导磁体中被广泛使用的鞍型线圈,设计了一种由鞍型线圈组成、能够对Halbach磁体的横向磁场进行补偿的柱面匀场线圈。仿真和实验结果证明了设计方法的正确性。The geometry of a Halbach magnet is ideal for use as a magnetic field source in a table-top nuclear magnetic resonance（NMR） spectrometer.But the magnetic field of an unmodified Halbach magnet is not sufficiently homogeneous to allow observation of a nuclear magnetic resonance signal.In this paper,the saddle coils,which are used in the superconducting magnet,are introduced into the shimming of Halbach magnet.For the development of high resolution table-top NMR spectrometer,the special cylinder shim coils comprised of saddle coils are designed to improve the homogeneity of the transverse magnetic field of Halbach magnet.

关 键 词：核磁共振(NMR)波谱仪 匀场线圈 HALBACH磁体 横向磁场 鞍型线圈 圆弧电流 

分 类 号：TM-53[电气工程]