Nuclear Weapons Effects Studies for the 5ESS (Trademark) Switch. Volume 2. EM (Electromagnetic) Shielding Characteristics of Structures

摘要

As part of its Electromagnetic Pulse (EMP) Mitigation Program, the National Communications System (NCS) funded AT&T to study the ability of the AT&T 5ESS(TM) Switch to withstand the potentially disabling effects of EMP from high-altitude nuclear bursts and fallout radiation from distant near-surface bursts. This volume documents the study to characterize the electromagnetic (EM) shielding effectiveness of the trailer used to shelter the test switch during simulated-EMP testing and of central-office buildings in which 5ESS Switches might be housed in the Public Switched Network. The results were used to estimate the attenuated fields incident upon n installed switch and its associated intra-office cabling. Because the building types examined can provide a wide range of EM shielding values, no single set of attenuation curves will suffice to characterize central-office structures. (Author)