[iwar] re: e-bombs

From: David Alexander (david.alexander@bookham.com)
Date: 2002-01-08 08:38:55


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From: David Alexander <david.alexander@bookham.com>
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Date: Tue, 8 Jan 2002 16:38:55 -0000
Subject: [iwar] re: e-bombs
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>E-BOMB
>In the blink of an eye, electromagnetic bombs could throw civilization 
>back >200 years. And terrorists can build them for $400. BY JIM WILSON

People write these sensationalist articles with no understanding of the
physics. The field strength decay follows the inverse cube law. Now figure
how big an impulse the bomb has to generate to give a strong enough field to
do damage at 50 metres.

You don't make a faraday cage, you make a faraday box out of sheet metal,
and an 'airlock' door system with knife edge seals, just like those on most
NMR scanner rooms in hospitals. Easy to do and I've seen plenty of them in
my time. If you can design ones to stop the EMP from a 'bucket of instant
sunshine' (and they have) you can stop anything.

As for spikes, a huge spike suppressor (massive lump of iron works very
nicely) will sort that out.

Directed military weapons may be different - often you have intel on the
weapons you want to hit and know what freq. They are vulnerable to, you then
tune and direct your energy, rather than being broad-spectrum. Very much
like the ALQ pods on Wild Weasels, etc.

On average this same subject seems to come up every 9 months. The press
think they have a new angle - and they do...on ignorance.


David Alexander M.INSTIS
Global Client-Server, Communications
& Infrastructure Director

Bookham Technology plc

DDI:     01235 837823
Mobile: 0779 988 1284
David.Alexander@Bookham.com



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