CocoaJin, on 10 August 2012 - 08:09 PM, said:
So what might we be looking at? A tightly bound packet(s) of nitrogen or Argon gas(assuming hydrogen would be dangerous to store for usage) ?
Anything you could pull out of the air and ionize. Noble gasses are obviously the worst candidates, they like to hold onto their electrons. The LHC uses lead ions for its higher energy collisions, although obviously you're not going to grab lead from the atmosphere, hehe.
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Could this ball of plasma I pressume have enough residual coherency from the launcher to stay together through the max range of the shot? Could that coherency be achieved in the particles like lasers do to light?
It is hard to say how much attenuation of the beam's strength there would be. Coherency in this case is a little bit different than with lasers; it can't be achieved the way that lasers do because lasers take advantage of light's ability to easily pass through substances that are transparent to them. They can pass through lenses to be focused and, if the wavelength is carefully chosen, air does not strongly attenuate them simply because the atoms in the atmosphere will be unable to absorb photons of that particular frequency. Nothing is "transparent" to a massive particle or ion, though.
Assuming you fire the particles straight, the beam will not decohere on its own. A particle in motion stays in motion until acted upon by an outside force, right? The problem is that those particles, even with a lot of energy and momentum, can be acted upon with plenty of force by running into the particles in the atmosphere. Plus, atmospheric particles are ostensibly the same ones we're shooting, so it's rather like trying to shoot a bunch of billiard balls in a straight line across a room filled with other billiard balls.
There could be ways around it, though. The simplest is to simply accelerate enough particles that the particles at the head of the beam "clear the way" for the ones that follow. Naturally this would cause damage to taper with range, would make the beam weaker in environments with thicker atmospheres, and probably isn't a very efficient method. There are, perhaps, more clever ways to move the air out of the way by exciting it with relatively low-power, specific-frequency lasers, or other things I can't think of at 1am. This would certainly be a place where innovations could help turn a PPC into an ERPPC
Edited by Steel Spectre, 11 August 2012 - 12:27 AM.