funsec mailing list archives
Re: Missile Defence, the live version
From: Valdis.Kletnieks () vt edu
Date: Thu, 13 Jul 2006 13:50:50 -0400
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.
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.
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Current thread:
- Missile Defence, the live version Dude VanWinkle (Jul 13)
- Re: Missile Defence, the live version Valdis . Kletnieks (Jul 13)
- Re: Missile Defence, the live version Dude VanWinkle (Jul 13)
- Re: Missile Defence, the live version Valdis . Kletnieks (Jul 13)
- Re: Missile Defence, the live version Dude VanWinkle (Jul 13)
- Re: Missile Defence, the live version Valdis . Kletnieks (Jul 13)
- Re: Missile Defence, the live version Jarrod Frates (Jul 13)
- Re: Missile Defence, the live version Dude VanWinkle (Jul 13)
- Re: Missile Defence, the live version Andre Ludwig (Jul 13)
- Re: Missile Defence, the live version Andre Ludwig (Jul 13)
- Re: Missile Defence, the live version Andrew (Jul 13)
- Re: Missile Defence, the live version Dude VanWinkle (Jul 13)
- Re: Missile Defence, the live version Dude VanWinkle (Jul 13)
- Re: Missile Defence, the live version Valdis . Kletnieks (Jul 13)
- Re: Missile Defence, the live version Drsolly (Jul 13)
- Re: Missile Defence, the live version Valdis . Kletnieks (Jul 13)