AN APPROACH TO EMP HARDENING FOR NAVAL SHIPS

Abstract

ABSTRACTUnder the proper conditions a portion of the energy released during detonation of a nuclear device can appear as an Electro‐Magnetic Pulse (EMP) of sufficient field intensity to disrupt or destroy sensitive components in electronic equipments. Nuclear Weapon detonation outside the atmosphere will generate an EMP capable of disabling electrical and electronic system as far as 2,000 miles or more from the detonation site. The effects of EMP from such detonations can be felt when other nuclear effects such as thermal radiation, air blast overpressure, and nuclear radiation are absent. Solid‐state semiconductor and microminiature devices and components are particularly Susceptible to damage or upset from EMP.It is the purpose of this paper to describe the phenomenon of EMP and to outline methods of protection for susceptible electronic equipment. The scope of the papers is limited to approaches for hardening existing ships during the normal overhaul process. The paper begins with a discussion of the characteristics of the electromagnetic pulse that may he created through detonation of a nuclear device. This is followed by a discussion of materials and methods available to protect equipment from the effects of EMP and a discussion of how these hardening techniques may be implemented during the regular ship overhaul process.While the accent of this paper is toward regular ship overhauls, It is felt that the practices discussed will apply equally as well to new construction.