jimlux wrote:
Marshall Eubanks wrote:
On Oct 27, 2010, at 6:51 PM, Perry Sandeen wrote:
Gents,
Wrote: < If you want a sub-microsecond time of death, sit on a bomb
like Major T. J. "King" Kong in "Dr. Strangelove," and get your
friends to time and triangulate the prompt radiation. That should be
good to a few 10's of nanoseconds.
Folks, one doesn't need a thermonuclear device for this sort of almost
instantaneous disintegration.
Standard old high explosives could get your "duration of death" down in
the submillisecond range, and a simple optical pickup could determine
the time when the explosion occurs to nanoseconds (after calibrating for
light time delay).
Black powder which is really a propellant might even be able to
disassemble your corpus in less than a millisecond.
However, if one needs microsecond type uncertainties, then the nuclear
device is probably your best bet. Probably not under a microsecond
though, from simple mechanical disassembly. say you were standing just
outside the approaching fireball... the fireball (in early stages) grows
roughly at the speed of light as the photons proceed out. The question
would be whether there is enough flux to ionize you in a suitably short
time. Basically, you'd have to heat your 100kg or so up to a few
thousand K. Let's see.. 400kJ would heat 100kg up one degree, so 400MJ
would get you to 1000 degrees, which is hot, but not ionized. probably
dead though.
If you were, say, 10 meters away, and your body intercepts 1/2 square
meter of the flux which is assumed spread evenly over 314 square meters,
the instantaneous power of the explosion would have to be 400MJ*628 in 1
microsecond, or about 251GJ/microsecond, or a mere 250E15 Watts
I forgot.. 1 kt (about the smallest practical nuclear device) is about
4.194 TJ. Referring to my handy copy of Glasstone, 99.9% of the energy
is released in about 70 nanoseconds (the last 7 generations), and if
you're reasonably close, then the energy "pulse" hasn't had much time to
spread out, so even a small device is well over the threshold to keep
the variance in your duration of death under a microsecond.
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