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pages, marked with GREEN headings, are published
for comment
and criticism. These are not our final findings; some of
these opinions will probably change. LOG
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Overview
of all studies: Because of the largely unexpected transformational
power of molecular manufacturing, it is urgent to understand the issues
raised. To date, there has not been anything approaching an adequate
study of these issues. CRN's recommended series of thirty
essential studies is organized into five sections, covering fundamental
theory, possible technological capabilities, bootstrapping potential,
product capabilities, and policy questions. Several preliminary conclusions
are stated, and because our understanding points to a crisis, a parallel
process of conducting the studies is urged.
CRN is actively
looking for researchers interested in performing or assisting with this
work. Please contact CRN Research Director Chris
Phoenix if you would like more information or if you have comments
on the proposed studies.
Study
#13
What
is the probable capability of the manufacturing system?
How much product
per hour? How many features per hour? How much input, and what kind? How
much waste? These questions will be answered for diamondoid systems
based on the Phoenix
nanofactory design.
Subquestion
Does
the system require human supervision or intervention while operating?
Preliminary
answer
No. The (calculated)
extremely high reliability of mechanosynthesis should allow completely
autonomous operation; see Drexler, Nanosystems.
Convergent assembly can use very simple robotics. With a reasonably low
error rate in each fabrication unit permitting a reasonably low degree
of unit-level redundancy, the nanofactory can take units offline permanently
at any failure, and so would not need repair.
Subquestion
How
many features per second (complexity) will the system produce?
Preliminary
answer
Each fabrication
unit might produce 1,000 to 10,000 features per second: 10 to 100 atoms
per feature, 100,000 atoms placed per unit per second. A less primitive
design might place a million or more atoms per second. Each unit would
be independently addressable with any of several thousand or million program
streams. Basically, the product complexity is limited by the information
that can be downloaded into the factory over a fast network in the few-hour
fabrication time. This could easily amount to several terabytes—far
more complexity than would be needed for most products. (For comparison,
human DNA is several gigabytes.)
Subquestion
What
error rate will be built into the product components?
Preliminary
answer
With primitive
mechanochemical hardware, fewer than 1 in 108 atoms should
be out of place. Better designs should be able to achieve 1 in 1015.
At this point, damage from environmental radiation becomes a bigger concern.
Subquestion
How
many grams per hour will the system produce?
Preliminary
answer
A small-scale
manufacturing system with no redundancy and external computer control
might fabricate its mass in several hours. Scaled to tabletop size, it
could take the better part of a day, but might be much quicker with more
advanced designs. A single box massing a few kg could produce ~1 kg/hr
in the reference design.
Subquestion
What
raw materials will the system require?
Preliminary
answer
Some small
carbon-rich molecule, not yet specified.
Subquestion
What
waste will it produce?
Preliminary
answer
Not yet specified.
Ideally it would produce harmless or useful molecules such as water and
hydrocarbons. The reference
design also uses ~250 kWh/kg energy.
Conclusion
The
reference design would be easy and cheap to use, producing its mass in
probably less than a day. Its products could be quite complex—limited
by design capabilities rather than limitations inherent in the nanofactory
architecture.
The situation
is extremely urgent. The stakes are unprecedented, and the world is unprepared.
The basic findings of these studies should be verified as rapidly as possible
(months, not years). Policy preparation and planning for implementation,
likely including a crash development program, should begin immediately.
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