Shielding Factor and Maximum Magnetic Flux Density of Cylindrical Magnetic Shield against Axial Magnetic Field

摘要

Studies on the shielding factor against the transverse magnetic field have been carried out but that against the axial (longitudinal) magnetic field is less studied. Moreover, the maximum magnetic flux density in magnetic materials of the shield is not evaluated up to the present. Applying existing approximate expressions for the shielding factor, approximate expressions for the Maximum magnetic flux density were derived for single and double cylindrical magnetic shields.