Effect of magnetic relaxation times on electromagnetic pulseshielding |
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| Authors: | Zayek F. McKnight S.W. Vittoria C. Maisch W. Stauss G. |
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| Affiliation: | Center for Electromagn. Res., Northeastern Univ., Boston, MA; |
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| Abstract: | The penetration of an electromagnetic pulse (EMP) through a ferromagnetic conducting thin film is investigated for the case in which the magnetization of the material has a characteristic time delay τ. Both saturation and hysteresis effects of he magnetization are considered and the susceptibility is defined in the nonlinear region as dM/dh. It is found that the response time τ has a significant effect on the shielding factor with optimum shielding when τ is on the order of twice the rise time of the pulse |
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