A new estimation of the axial shielding factors for multishell cylindrical shields

Eugene Paperno, Hiroyuki Koide, Ichiro Sasada

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

A new, more accurate formula describing double and multiple-shell axial magnetic shielding is obtained as a result of numerical verification of existing estimations. A standard ANSYS® software package was used. Parameters of the numerical model are as follows. Two concentric, closed cylinders of equal thickness and constant permeability are considered. The thickness-to-diameter ratio of the outer cylinder is t/D2 = 1/100, its length-to-diameter ratio varies as L2/D2 = 3, 4, and 5, the ratio of the cylinders' outer diameters varies as D1/D2 = 0.5, 0.6, 0.7, 0.8, and 0.9, a range of the ratio of the cylinders' lengths is L1/L2 = 0.1-0.9, and a range of the relative permeability is μ = 103-106. A significant disagreement between the existing estimations and between each of them and the numerical model is found. One of the examined algorithms is modified to improve its precision. A remarkable improvement in the accuracy of the new algorithm compared to both existing methods is achieved. On a basis of the new algorithm, a new formula describing multishell axial magnetic shielding is suggested.

Original languageEnglish
Pages (from-to)5959-5961
Number of pages3
JournalJournal of Applied Physics
Volume87
Issue number9 III
Publication statusPublished - May 1 2000

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shielding
magnetic shielding
permeability
computer programs

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)

Cite this

A new estimation of the axial shielding factors for multishell cylindrical shields. / Paperno, Eugene; Koide, Hiroyuki; Sasada, Ichiro.

In: Journal of Applied Physics, Vol. 87, No. 9 III, 01.05.2000, p. 5959-5961.

Research output: Contribution to journalArticle

Paperno, E, Koide, H & Sasada, I 2000, 'A new estimation of the axial shielding factors for multishell cylindrical shields', Journal of Applied Physics, vol. 87, no. 9 III, pp. 5959-5961.
Paperno, Eugene ; Koide, Hiroyuki ; Sasada, Ichiro. / A new estimation of the axial shielding factors for multishell cylindrical shields. In: Journal of Applied Physics. 2000 ; Vol. 87, No. 9 III. pp. 5959-5961.
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