Influence of Cylindrical Shield Dimensions on Shielding Effectiveness

IF 0.2 Q4 INSTRUMENTS & INSTRUMENTATION Devices and Methods of Measurements Pub Date : 2022-07-06 DOI:10.21122/2220-9506-2022-13-2-112-116

O. Kanafyev, A. Trukhanov, T. Zubar, S. Grabchikov, M. Panasiuk, A. Kotelnikova, V. Fedkin, V. Fedosyuk

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Abstract

Study of dimensional parametersʼ influence on shielding properties of cylindrical shields will allow to optimise the fusion process, as well as to reduce production costs by reducing the material used. The purpose of this work was to compare results of theoretical calculation of shielding effectiveness of an infinite cylindrical shield with the data obtained in real conditions.A cylindrical Ni-Fe shield was synthesised by electrochemical deposition with length of 32 cm, diameter of 4.5 cm and shielding thickness of ≈ 100 µm. The cylinder length was then reduced from 32 cm to 6 cm in 4 cm increments and for each cylinder length shielding effectiveness was measured using three-coordinate Helmholtz field-forming system.The measurement results show that the calculation of shielding effectiveness of infinite cylindrical shield is valid for cylinder lengths l ≥ 18–20 cm. Shielding effectiveness is markedly reduced at values of l ˂ 15 cm.Analysis of data obtained allowed to conclude that it is necessary to determine the correction factor when calculating a cylindrical screen shielding efficiency

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圆柱屏蔽尺寸对屏蔽效能的影响

研究尺寸参数对圆柱形屏蔽性能的影响将有助于优化熔合工艺，并通过减少使用的材料来降低生产成本。本文的目的是将无限圆柱形屏蔽体屏蔽效能的理论计算结果与实际条件下的数据进行比较。采用电化学沉积法制备了长度为32 cm、直径为4.5 cm、屏蔽厚度为≈100µm的圆柱形Ni-Fe屏蔽层。然后将圆柱体长度从32厘米以4厘米的增量减少到6厘米，并使用三坐标亥姆霍兹场形成系统测量每个圆柱体长度的屏蔽效果。测量结果表明，当柱面长度≥18 ~ 20 cm时，无限圆柱形屏蔽体的屏蔽效能计算是有效的。当值为1小于15 cm时，屏蔽效果明显降低。通过对所得数据的分析得出结论，在计算圆柱筛屏蔽效率时，有必要确定校正系数

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Devices and Methods of Measurements INSTRUMENTS & INSTRUMENTATION-

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