Analyzing the uniformity of the generated magnetic field by a practical one-dimensional Helmholtz coils system
Analyzing the uniformity of the generated magnetic field by a practical one-dimensional Helmholtz coils system
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DOI：
10.1063/1.4813275
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发表时间：
2013-07-01
影响因子：
1.6
通讯作者：
Beiranvand, R.
中科院分区：
文献类型：
--
作者：
Beiranvand, R.
使用亥姆霍兹线圈系统是已经引入的用于产生均匀磁场的最合适的方法之一。本文从数学上分析了实际一维亥姆霍兹线圈系统产生磁场的均匀性。为此，磁场均匀性和不同的实际不可避免的失配之间的关系已被提取。理论分析清楚地表明了组装不对准和制造不匹配对实际一维亥姆霍兹线圈系统所实现的磁场的影响。实验结果与理论计算值吻合较好。该分析和实验结果表明，为了实现非常高的均匀磁场，实际的装配不对准和制造不匹配必须尽可能小，并且背景磁场失真也必须避免。这项工作的结果是重要的仪器和系统的设计中使用亥姆霍兹线圈。(C)2013 AIP Publishing LLC.
Using the Helmholtz coils system is one of the most suitable approaches which have been introduced for generating uniform magnetic fields. In this paper, uniformity of the generated magnetic field by a practical one-dimensional (1D) Helmholtz coils system has been analyzed, mathematically. For this purpose, relationships between the magnetic field uniformity and different practical unavoidable mismatches have been extracted. The theoretical analysis clearly demonstrates the effect of assembly misalignments and manufacturing mismatches on the magnetic field achieved by a practical 1D Helmholtz coils system. The given analyses have been confirmed by the experimental results which are in good agreement with the calculated values. This analysis and the experimental results illustrate that to achieve a very high uniform magnetic field, practical assembly misalignments, and manufacturing mismatches must be as small as possible, and the background magnetic field distortion must be avoided, too. The results of this work are important in the design of instruments and systems where Helmholtz coils are used. (C) 2013 AIP Publishing LLC.