I see,
So in theory, what would it take to protect a current production model car
from "NEMP" and just for curiosity sake, could a radio be protected by
wrapping it in aluminum foil or would the Thompson effect excite electrons
in a similar manner to electrical conductivity and cause more damage.
-----Original Message-----
From: rertman@ix.netcom.com [mailto:rertman@ix.netcom.com]
Sent: Monday, October 02, 2000 11:07 AM
To: Rikk Rogers
Subject: Re: [MV] M52 five ton ALWAYS ON problem fixed. And EMP.
It propagates by a unique effect that excites electrons out of orbit,
then they do the same to other electrons, etc., in what's called the
Thompson Effect. Frequency range can be from HF up to X-band. Field
strengths can be as high as 10,000 volts/meter. The details depend on
weapon yield, burst altitude and a host of other factors.
Protection against NEMP is not difficult to achieve, but it does add
considerable weight...not desirable in aircraft. However, some recent
developments have made the protection stuff lighter...along with
internal equipment design. In military aircraft (fly-by-wire/computer)
EMP protection is designed in to keep the bird flyable despite an EMP
event.
In the Russian stuff, it wasn't the simplicity of the electronics, it
was the continued use of vacuum tubes, which are nearly immune to EMP.
This is because semiconductors are inherently delicate devices. Their
tiny internal structures are easily damaged by small arcs that occur
when EMP happens...similar to what happens when you handle them and the
static discharge from your hand causes a static electric arc inside the
device, whether it's a single transistor (especially FETs) or an IC.
Dick
Rikk Rogers wrote:
>
> Ok, so does it follow the ionosphere like AM, or travel line of sight like
> FM.
> I had read some ware that the logic in not protecting the electronics in
war
> planes better was that if they were close enough for effect the pilot
would
> take enough damage that the plane was the lest of the worries, (used to
keep
> a file, wish i still had it).
> Another reference came in was that the Migs had relatively simple
> electronics and the DoD was not sure why until they figured out that the
> "simpler" electronics were less vulnerable to EMP.
>
> Anyone know how wide the bandwidth of EMP is?
>
> -----Original Message-----
> From: rertman@ix.netcom.com [mailto:rertman@ix.netcom.com]
> Sent: Monday, October 02, 2000 9:19 AM
> To: Rikk Rogers
> Subject: Re: [MV] M52 five ton ALWAYS ON problem fixed. And EMP.
>
> Rikk,
>
> Nuclear EMP (NEMP) is definitely NOT a localized phenomenon. To some
> extent it depends on the altitude of the air burst and, of course, the
> weapon's energy yield. In fact, the NEMP effect can be mirrored on the
> opposite side of the world, depending on conditions.
>
> Sorry I can't discuss actual yields, frequencies or energy levels, but
> you could probably find that info on the Web or even in your local
> library.
>
> Regards,
>
> Dick
> Manager (retired), Electromagnetic Environmental Effects
> Lockheed Skunk Works.
>
> Rikk Rogers wrote:
> >
> > I think, and someone correct me if I'm wrong, that EMP is a fairly
> localized
> > phenomena, as I remember It may well be "Line of sight".
> > With an Air burst and a 1k/ft radio tower this is a long way off, but at
> > ground level fallout will probably get you.
> > The need to make vehicles "hard" would apply in a tactical nuke
situation.
> >
> > Also, to protect electronics i was told years ago to encase them in a
can
> or
> > grid, insluted from the circuts and ground the encasement if possable.
> > Theory is it carries the "pulse" past like a car does lightning.
> >
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This archive was generated by hypermail 2b29 : Wed Nov 01 2000 - 21:37:35 PST