Solar Shield II

Solar Shield II
Andre Willers

16 May 2010



Also known as Space-based reflectors , Sun shields , Sun umbrellas , Solar umbrellas .



Safety :

These technologies are not safe , but are already in public domain .

But they are safer than most proposed geoengineering schemes in that they are dynamic and can be stopped fairly quickly if unforeseen deletrious effects occur .



Synopsis :

Geoengineering is suddenly fashionable after the expected failure of protocols to limit CO2 emission on planetary scale . (Expected because of Tragedy of the Commons argument.)



See NewScientist of 3 Apr 2010 . There has also been a meeting at Asimolar , hopefully similar to a meeting at the same venue 35 years ago to get some ethical order in bio-engineering .



Republished in Addendum A below are some old arguments of mine.

This gives some fairly safe technologies to accomplish these aims .



Note that a major advantage is that these technologies do not need a consensus to be effective . Rich enough nations (USA , Russia , China , Japan , India) can implement them unilaterally or in small coalitions for a modest price . These nations also badly need projects like these to soak up the differences between wealth-creation and monetary-unit creation . See http://andreswhy.blogspot.com "Financial Crises 14 May 2010"



Be cool , Man .



Andre.



Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx



Addendum A
See http://andreswhy.blogspot.com "Solar Shield"

See http://andreswhy.blogspot.com "Orion , Gaia needs you"

See http://andreswhy.blogspot.com "Training the Immune system"



Solar Shield
15/5/2005

Andre Willers



Global warming is not just a short term problem . Barring catastrophe , human energy generation from fusion and non-solar sources will within a few centuries exceed the solar influx . We will need planetary air-conditioning .



(See Larry Niven's Puppeteer Planets)



At first , the simplest way is to put up an umbrella .



A simple solar Umbrella can be created by injecting Lunar reflecting dust into a hyperbolic orbit between the sun and Earth by mass-drivers on Luna .



The space elements of a moonbase and mass-drivers an be done with existing technology .



The Terran climate models needed for effective climate-control also exists , but can do with some refining .



The political control of an effective climate control system still needs some work .



The money , paradoxically , is the easiest . Big insurance companies (like Swiss Re , etc ) can easily fork up the estimated $60 billion this will cost . ( One big hurricane can cost $20 billion in damages .)



Later on it gets trickier .



At higher levels of planetary energy generation , Hilsch-tube lasers could directly pump energy out . A model that springs to mind is a fairly massive object (a few billion tons) in a perpetually skipping orbit . Propulsion would be by Hilsch-tube lasers (existing technology) and fusion (Orion-type existing tech.) More elegantly , the lasers would be boosted by fusion processes in the laser . This could be made made fairly fail-safe , so that there would be a nett energy loss to the planet . The matter-loss would have to be topped up ( comets?)



Of course , the same technology could be used to strip-mine a planet or sun .

Cascaded Hilsch-tubes were used in the South-African Uranium235-enrichment process for weapons purposes . A large physical or magnetic Hisch-tube cascade can be used like a mass-spectrometer to separate elements .



It would make a great booster for light-sails , or an awesome weapon . Also , cheap , pure elements



Time horizen : since all the above elements are based on standard physics , it can be done . Whether it will be , depends on humans .



Regards

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Reusable reaction mass.

15/5/2005

Andre Willers



Illustration:



Imagine a 50 ton solar-powered launching satelite with a set of mass-driver rings in LEO at 18 000 mph in a West-to-East Low Earth Orbit .



Let it accellerate a 50 ton payload via mass-driver to 36 000 mph in some tangential direction .



In reaction , the Launching satelite will now orbit at 18 000 mph in an East-to-West direction .



Of course it is a bit more complicated than this , but the orbital mechanics are well within present technology (and really old maths) .



Docking new craft with the Launching satelite is also proven technology (ref International Space Station). This can then be relaunched in the opposite direction .



Essentially , the same reaction mass can be used over and over again , as long as it has been in orbit and an energy source is available (solar power , nuclear , etc).



All you need to do is get off-planet . Later on , the most valuable real-estate becomes in-vacuo mass (because you can use mass-drivers cheaply).



The orbit can be around any planet or sun .

The station need never decay .



One can imagine a Solar System ( at various ages ) with literally millions of millennia-old booster-stations in various solar and planetary orbits , each of various technological levels of development . They are inhabited , of course . Throw in some collapses and a singularity or two .

The political system and races will be quite fragmented .



Alien invaders would only consider a system with a developed transport infrastructure and fragmented culture .



This stellar signature should be quite distinct . The end result should be a Dyson-sphere or Ringworlds . But the intermediate stages will vary considerably .



They should also be observed more easily .



Jupiter class worlds will be moved closer to the sun for more efficient dismantling .



Planetary blobs and ringworlds should be observable by striations . Technological ramp-ups up waste-energy dispersal should be measurable if there are handy gas-clouds of various distances nearby . Reflections of planetary laser-heat dispersals varying over time might give a clue .



As can be seen , arriving at the optimum Dyson sphere stage will be outmatched by the number of civilizations either en-route or become agley .



To quote a Sol humanoid , each happy civilization is the same , but each unhappy one is unhappy in its own way .



Happy universes !



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