Is it even theoritacally possible to build a weapon that while orbiting in LEO (low earth orbit) can generate enough power to turn steel into dust? For that matter, has steel ever been turned to dust right here on earth?
My bench grinder dustifies steel quite nicely. It takes about one minute, operating at about two horsepower (1500 Watts), to dustify a gram of steel. That's 1.11 x 10^-8 kilograms of steel dustified per Watt per second.
The process is not impressively efficient. Much of the power is wasted as heat, in the motor, the workpiece, and the dust. The dust further self-heats, burning in the air to white-hot temperatures, but that energy comes from the available chemical potential energy of steel in an oxygen atmosphere and so does not represent any further inefficiency of my dustifier.
Let's suppose our magic space beam weapon is a thousand times more efficient than that. (So, if my bench grinder is a mere 1/10th of 1% efficient, our weapon would be 99.9% efficient.) That would allow it to turn steel the same dust my bench grinder does, without heating up the workpiece or the dust by more than a few degrees.
Being 1000 times more efficient, this weapon can dustify 1.11 x 10^-5 kilograms per Watt per second.
To dustify 100 million kilograms of steel in 15 seconds, it would have to operate at 10^8 / (15 * 1.11 * 10^-5) = 6 x 10^11 Watts.
600 Gigawatts is:
- 289 times the peak power output of Hoover Dam
- 200 times the peak power output of the world's largest nuclear reactors
- 3000 times the power output of the most powerful nuclear-powered ships and submarines
- Almost 500 times the power needed to energize a flux capacitor.
Now, this is not an unimaginably large amount of power. But it is an impractically large amount of power for any conceivable space platform utilizing any known power generation/conversion and/or energy storage and/or energy transmission system. We're not talking about a few ultra-short pulses here. That power level must be sustained for fifteen continuous seconds. If the power is in shorter pulses of some kind, then it must be increased in proportion to the inverse of the duty cycle of the pulses (that is, the fraction of the time during which the pulsed beam is "on"). If the total beam time is shorter than fifteen seconds, then the power must increase in proportion to the time decrease.
And all of that is assuming a super-efficient dustification mechanism that's unknown to physics. One that's somehow orders of magnitude more efficient than mechanically pulling each particle loose from its neighbors, which is essentially what my bench grinder does.
And where did all the steel dust go?
And where did all those non-dustified steel beams stacked up at Fresh Kills come from?
This topic is silly any way you look at it.
Respectfully,
Myriad