IEMI - It's only a matter of time

Local EMP attacks the size of a briefcase.

Ways to protect from a local attack. - Photo

an electric field of 50 kV/m from 100 meters away - damage photo below.

 Circuits Flambé, with crisped chips and broiled boards, resulted from tests with pulsed electromagnetic radiation in the author’s laboratory at Metatech Corp., in Goleta, Calif. The damage, from left, is as follows: A lid of an integrated circuit was scorched and warped; the capacitor labeled “C9” was completely blown away; part of a ceramic capacitor was shorn off; and the right-hand edge of a small integrated circuit was blasted.

 My Father was a Defense contractor for the US Military and his designs in the 70's and 80's had to meet 5kV/m protection requirement measured at the location of the equipment.That was easier back then with slower processor speeds running at higher voltage.






The first line of defense should be putting as much distance as possible between you and the attacker. For instance, you could surround a building with a broad green meadow protected by fences, thus taking advantage of the falloff in an antenna’s electric field strength with distance. That’s not always possible, of course, so at the very least, you should locate critical equipment away from the building’s outermost walls.
The second line of defense involves the building in which the sensitive electronics are housed. No cable should enter the building without first passing through a specially designed surge arrester and a filter protection device coupled to a low-inductance grounding system. The surge arrester will “clip” a high-voltage pulse, but it will also generate some additional high-frequency noise, which the filter protection device will remove. The third line of defense lies in the walls themselves. Ideally, they should contain no windows, which are rather transparent to high-frequency EM fields; if there must be windows, cover them with metal screens. You should harden the walls with metal, such as concrete reinforced with rebar or even metallic wallboard. Best of all is a complete metal shield.

FYI

My Father told me that an over head exploded nuke in the upper atmosphere or space would generate about 50,000 V/m at Ground level. Pretty much trashes every electronic device you have not to mention the power grid. Could possibly set your house on fire through electrical wiring not protected by metal conduit..