Magnetic field fluctuations arising from thermal motion of electric charge in conductors

Magnetic field fluctuations arising from thermal motion of electric charge in conductors
复制标题

导体中电荷的热运动引起的磁场波动

DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
T. Poutanen
T. Poutanen
中科院分区：
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文献类型：
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作者：
T. Varpula;T. Poutanen

文献摘要

被引文献

相似文献

建立了导体中电荷热搅动产生的磁场起伏的模型。用该模型计算热磁噪声涉及到一个一般的体导体正问题的求解。这个问题的频率相关方程是从麦克斯韦方程推导出来的。应用该模型计算了无限长导电板产生的磁噪声。理论预测与实验结果吻合较好。估计了磁屏蔽室内的热磁噪声场，并讨论了生物磁测量中的噪声。
A model is developed for the source of magnetic field fluctuations emanating from thermal agitation of electric charge in conductors. The calculation of the thermal magnetic noise with the model involves the solution of a general volume conductor forward problem. Frequency‐dependent equations for this problem are derived from Maxwell’s equations. The model is applied to calculate the magnetic noise generated by infinite conducting slabs. A good agreement between theoretical predictions and experimental results were found. Thermal magnetic noise fields inside magnetically shielded rooms are estimated and noise in biomagnetic measurements is discussed.