Thanks, again. The funny thing is that my quantitative analysis didn't even require any specialized knowledge - just a general familiarity with the topic that facilitated a little Web-searching. (Like I said, I'm not a laser guy, nor for that matter a materials scientist.) I just took the picture of the ABL that
jammonius was so fond of posting and estimated how much energy it would carry vs.
how much energy it would take to vaporize a fraction of the steel in one of the Towers. Ironically, everything I needed
was public and needed no effort beyond moving a mouse and working a keyboard.
The other numerical analyses certainly did deserve your accolades.
R. Mackey looked at the problems with such a device being in orbit, and looked at
the beam energy and energy storage necessary to deliver approximately twice the kinetic energy delivered by one of the hijacked aircraft. He then went on to look at launch and other problems with this scenario. In every case, he showed clearly why it was unfeasible.
Myriad looked specifically at
the energy needed to literally "dustify" the Towers, based on his own experimental data - thus earning him membership in the Jr.
Crazy Chainsaw Fan Club. I was going to point this out to
jammonius if she claimed that "dustification" was entirely different from vaporization. Interestingly,
Myriad came up with a power requirement roughly twice mine, but his analysis was more realistic in terms of delivered energy than mine.
BenBurch used the physics of the atmosphere and terrestrial magnetic field, as well as the physics of beam generation, and
limited the possible invisible-magic-death-ray choices to a narrow range in the infrared; he also specified various show-stopping problems with each possible type of beam. His approach rather elegantly addressed (and answered) the most fundamental aspect of the DEW scenario:
what kind of weapon was it? In other words, he did all of
jammonius' work for her, in explicit detail, and she
still couldn't answer the question!
Their excellent work, tackling the issue from multiple directions, is exactly what I meant when I said the problem had been quantitatively bounded. Well done indeed to all of them!