We present an experimental system aimed at mapping the magnetic field created by a ring magnet in the working region of a single-magnet magnetic levitation system. The key idea is based on the photoregistration of a transparent air-filled cavity formed in a thin magnetic fluid layer due to balancing the gas pressure and the pressure emerging due to magnetic forces. As a result, the contour of the magnetic field lines in 3-D space is visible. It was shown that the theoretical analysis, numerical simulations, and experimental results are consistent.

中文翻译：

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使用薄层磁流体研究环形磁铁 MagLev 系统的工作区域

我们提出了一个实验系统，旨在绘制由环形磁铁在单磁铁磁悬浮系统的工作区域中产生的磁场。关键思想是基于在薄磁性流体层中形成的透明充气腔的光配准，这是由于平衡气体压力和磁力产生的压力。因此，3-D 空间中磁场线的轮廓是可见的。结果表明，理论分析、数值模拟和实验结果是一致的。