大尺寸、薄、开口、圆柱形金属磁屏蔽的高轴向屏蔽系数性能技术
Technique for high axial shielding factor performance of large-scale, thin, open-ended, cylindrical Metglas magnetic shields
摘要：
Metalloy 2705 M是一种低成本的市售高磁导率钴基磁性合金，以5.08 cm宽和20.3- $μ$ m厚的带状箔提供。我们提出了一种优化的单壳，大规模（人类大小），薄，开放式圆柱形金属磁屏蔽的建设技术。对于仅122 $μ$ m的材料厚度（即，6个箔层）。我们的单壳金属磁屏蔽的轴向屏蔽性能，获得不使用磁振动技术，是相当的性能显着更厚，多壳，开放式金属磁屏蔽在相当的幅度，低频应用的外部领域以前在文献中报道。
英文摘要：
Metglas 2705M is a low-cost commercially-available, high-permeability Cobalt-based magnetic alloy, provided as a 5.08-cm wide and 20.3-$μ$m thick ribbon foil. We present an optimized construction technique for single-shell, large-scale (human-size), thin, open-ended cylindrical Metglas magnetic shields. The measured DC axial and transverse magnetic shielding factors of our 0.61-m diameter and 1.83-m long shields in the Earth's magnetic field were 267 and 1500, for material thicknesses of only 122 $μ$m (i.e., 6 foil layers). The axial shielding performance of our single-shell Metglas magnetic shields, obtained without the use of magnetic shaking techniques, is comparable to the performance of significantly thicker, multiple-shell, open-ended Metglas magnetic shields in comparable-magnitude, low-frequency applied external fields reported previously in the literature.
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