Context: that was with regard to their hitting the Asulum dome, assuming they
could cut through the force-field-- i.e. it wouldn't be safe to even
attempt.
So Scotty then said they would try to cut through the shield at the
weakest point, which was at the far side of the planet-- and they couldn't do it, even at full power.
If they couldn't cut through the weakest part of the shield, then obviously they couldn't cut through the strongest part directly over the asylum.
The purpose of that shield, meanwhile, was simply to keep people in prison and prevent rescue from the asylum itself-- not to protect the whole planet from a military strike; but ST base-shields are just so
bad-ass, that they stopped military strikes even without trying!
Now if they could do that even without trying, then a full-out defense-system would be pretty much invulnerable against known weapons.
Mike DiCenso wrote:Correct. If the Enterprise had opened up with everything it had, it could have ripped through the Elba II Asylum shield, but only at the cost of destroying the dome and killing everyone inside it. They even reiterate this when the Enterprise is trying to cut through the weakest part of the shield on the opposite side of the planet from where the asylum dome is located!
No, it couldn't: They
did open up with everything it had, and hit the shield
at the weakest point with FULL POWER, and
narrow-beam-- to no effect!
They try again: still, NO EFFECT; and obviously there was no point in trying further, since the shield was just too powerful.
Again, this was the weakest point; so if the did it over the asylum, then it would do nothing at all, and so Scotty's concerns of harming those inside it were entirely unnecessary.
Be that as it may, just the two main phaser banks of the Enterprise, a top of the line capital ship was not enough to cut through even the weakest part of the shield by themselves. Another thing to consider is that the Elba II shield was a single shield being projected from a single source on the planet... the asylum itself. Imagine what kind of planetary shield facilities would exist for a major member world, like Earth, Vulcan, Andor, ect.
As I said, it could hold off V'ger, as the novel indicated it could-- and definitely the Death Star.
But there's also another astounding thing to consider. The Constitution-class Enterprise's main phasers have to be pretty powerful considering that the U.S.S. Defiant in the Mirror Universe easily tanked shots with and without shields from the Mirror NX class and other starships, and we know that in the Prime Verse, the NX could manage 1-10 TJ per shot of the two main phase cannons. Now think about that. If the Elba shield could tank at least 1 TW per square meter, it would imply an enourmous power source that can be maintained for an indefinite period of time. Assuming that Elba II is just slightly smaller than Earth (Radius= 6,000 km), and that the shield was a ground-hugging affair, we would expect a surface area of about 4.524e14 m^2... the equivalent in TW since we are assuming 1 TW per square meter. Or to put it another way, that's 10,803,059,273.4 gigatons of tanking power for the total shield! This is from a single-source shield!
-Mike
Assuming it could withstand the same amount of force applied to every part of the shield at once, as applied to a little bit of it-- but there's no reason to make that assumption.
Rather, a planetary shield can simply spread a small bit of force over a larger area, like a battle-shield can stop a blade-- or deflect it; but if you applied a larger amount of energy, it could overcome the shield-generator. That's the purpose of a mace, or a war-hammer or battle-axe-- i.e. it's a bigger and heavier weapon, solely in order to break through shields and armor by applying more force-- since obviously you don't need that much force against someone who doesn't have armor or a shield, and so it would be just useless weight.
Obviously, a planet-sized shield requires a
big honkin' generator-- easily more than an itty-bitty starship could produce; but NOTHING could generate enough power to counter that amount of energy, applied to every square inch of the planetary shield... short of a planet-sized warp-engine.
Now, the Death Star is "only" 120km in diameter, and only a small part of that was the power-generator-- which only used fusion; so it's entirely possible that Earth's defense-system would be able to deflect the Superlaser.