Re: Missile Defence, the live version

["Dude VanWinkle" <dudevanwinkle () gmail com>]

On 7/13/06, Valdis.Kletnieks () vt edu <Valdis.Kletnieks () vt edu> wrote:
> On Thu, 13 Jul 2006 13:08:54 EDT, Dude VanWinkle said:
>
> > You could probably configure the lasers to diffuse after they exit the
> > permeter.
>
> Hmm.. How do you do that, exactly?  Remember that the whole point of the
> laser is that those photons are going *straight*.  Of course, in reality,
> what you get is a very skinny cone, and you can change the angle of the
> vertex slightly.  But once it leaves, you're stuck with it.  If the beam
> has diverged to 0.2 inches at 5 miles, it's going to be 0.4 inches at 10
> miles, and still 1/4 the power per unit area.  You can't make it be
> "useful against missiles" at 5 miles, and "safe" at 6 miles.


Have two lasers :-) One is "safe", it takes two to heat up, three to Kill
;-)


>  Also, it doesnt have to be a metal cutting laser, just one
> > that will heat up the missile enough to cause detonation.
>
> Remember that one end of the missle is *already* on fire and designed to
> withstand some serious heat for at least a few seconds - and the other end
> is being cooled by some really serious airflow.  And keep in mind that
> many
> of the explosive payloads are going to be hard to trigger by mere heating,
> they often need a detonator cap (probably buried *well* inside where it's
> hard to hit) or electrical discharge or similar.

Good point

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