Study of Numerical Method for Magnetic Shielding Problem Considering Actual Measurement of Magnetic Environment
Study of Numerical Method for Magnetic Shielding Problem Considering Actual Measurement of Magnetic Environment
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DOI：
10.1109/tmag.2011.2175709
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发表时间：
2012-01
影响因子：
2.1
通讯作者：
S. Ujigawa;T. Shinnoh;N. Takahashi;D. Miyagi
中科院分区：
文献类型：
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作者：
S. Ujigawa;T. Shinnoh;N. Takahashi;D. Miyagi
磁屏蔽室优化设计的一个关键考虑因素是将应屏蔽的外部磁场施加到目标区域的方式。在本文中，我们研究了应用Bs方法（该方法的分析区域中的磁场Bs）的屏蔽问题的可能性与基于测量的磁场，其中包括作为噪声的无旋场分量，因此，是不符合麦克斯韦方程。我们表明，Bs方法有一个明确的物理意义，这样的无旋场分量。此外，我们解释了为什么Bs方法的收敛性和精度优于A方法。
A critical consideration in the optimal design of magnetically shielded rooms is the manner in which an external magnetic field, which should be shielded, is imposed on a target area. In this paper, we examined the possibility of applying the Bs method (the method of which the magnetic field Bs in the analyzed region is given) to the shielding problem with a measurement-based magnetic field, which includes an irrotational field component as noise, and, therefore, is inconsistent with Maxwell's equations. We show that the Bs method has a well-defined physical meaning for such an irrotational field component. Furthermore, we explain why the convergence and the accuracy of the Bs method are better than those of the A method.