kzt wrote:Relax wrote:Death occurs due to explosive expansion when the 95% of their body containing water turns into a gas. And anyone else nearby will be obliterated by flying debris.
Dude, what forms a fireball when a nuke goes off? It's the X-rays in air being absorbed in several feet and producing a plasma that strongly absorbs X-rays, and then heating that. That is what is going on for 20 miles of air. There is no coherent beam by the time you get to the ground. You have this inverted triangle of plasma sticking down into the atmosphere. It's not a tiny bit wider, it's hugely wider until the power density drops to the point where it no longer produces plasma in air. At that point you are "just" getting hard X-rays being emitted.
So no, X-Ray lasers are NOT what you want to use for precisely controlled delivery of force on the surface of Mesa.
Dude: Did you miss geometry class? A nuke makes a fireball because it is omnidirectional when it explodes. You do not get to change an XRays, VECTOR at will. Something has to reflect it. The only "something" that very marginally reflects XRAYS are materials like gold or tungsten carbide, or Niobium. I do not see Wolter telescopes covering the sky to get grazing reflectivity out of XRAY's. Of course that only works for low energy state XRAY's. XRAY's useless for destroying anything.
When high energy state XRAY hits an atom it strips it of its electrons turning it into a plasma and keeps going in the same direction it started in. Its amplitude drops. Plasma then reemmits an XRAY at right angles generally is my understanding from spin direction which then is absorbed into an atmospheric atoms. The distance required to absorb this energetic XRAY is the same no matter the height at which the initial atom was stripped. Follow on Xrays are still going straight. Plasma is transparent to high energy waves short wavelength waves letting the Xrays through in a line.
(Are we going to assume in phase or out of phase X-rays and therefore much higher density? Personally I would assume in phase. We are pretty much there today.) So, no, you most certainly do not get a triangular cone, you most certainly do get a column of plasma.
You could argue that there are better solutions, KEW, which one can vary for total destructive power, but most certainly a PDLC would work. Has to be able to blow away a missile moving at 0.8c at 200,000km. Somehow a target at most 1000km away moving VERY slowly is not going to pose a problem.