Dyson Dumbells: Was: Re: the ultimate refrigerator

Michael Lorrey (retroman@together.net)
Tue, 16 Dec 1997 08:12:35 -0500

Anders Sandberg wrote:
>
> Wei Dai <weidai@eskimo.com> writes:
>
> > Black holes emit Hawking radiation at a temperature of
> > T=h*c^3/(16*pi*G*M). With the mass of the sun, the temperature of a black
> > hole would be about 10^-8 K. At this temperature, erasing a bit costs only
> > about 10^-31 J. If you build an insulating shell outside the event horizon
> > of a black hole, everything inside the shell would eventually cool down to
> > the temperature of the black hole.
>

This gives me a solution to the Cosmic Filter dillemma. Rather than a
Dyson Sphere radiating its encircled star's output as black body
radiation, the inside surface would be coated in thermal superconductor
material. The Dyson shell would have a twin around a black hole that
orbited the star at a relatively constant distance, and would be
likewise encircled by a shell of superconducting material. The two
shells would be linked by a spinning tube, the inside surface of which
would be inhabited by a civilization. The star shell end would be the
"hot" electrode of a multimillion mile long particle beam which would be
grounded at the black hole end. The tube surface would have thermal
superconductor embedded in it to pipe waste heat to the black hole. The
particle beam would interact with the helium "upper atmosphere" in the
center of the spinning tube to provide illumination.

-- 
TANSTAAFL!!!
			Michael Lorrey
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