... You're free to use a lower density. ... This is good. You want the density to be better than 1. ... There's no need for torroidal tanks. The simplest...
http://arxiv.org/PS_cache/arxiv/pdf/0812/0812.0397v1.pdf http://science.slashdot.org/article.pl?sid=09/02/01/142239 "A former colleague of Edward Teller —...
... This is the same thing as this earlier post, right? http://games.groups.yahoo.com/group/sfconsim-l/message/75347 I am not a physicist, so I don't really...
... "A first step in this direction is the non-fission ignition of deuterium-tritium (DT) thermonuclear micro-explosions; the easiest one to be ignited...
... How does Sandia's data reconcile with the performance of modern GPUs? A Radeon R770 PRO GPU is essentially 800 RISC cores on one chip. ATI would not be...
... deuterium-tritium (DT) thermonuclear micro-explosions; the easiest one to be ignited expected to be realized in the near future." ... yield a flying pig....
... Not in an absolute sense. SSE-style SIMD has been available for quite some time in SMP cores while GPU hardware running GPGPU code is only a hair from...
... Actually, it's even easier than that. You only need to outperform an electrical thruster, which just means you've got more power going into the exhaust...
... That's assuming all other things equal, which is not at all obvious. Your fusion drive may be much heavier than an electric thruster. It may use...
... Nice point on AJ's part. ... All of these might be the case, or may not be. The broader point I'd argue is that fusion drive != torch. The power density...
... It does place a lot of restrictions on how greatly a fusion drive must outperform an electric drive to be worthwhile. The ones which I imagine are pretty...
... True, I should have stated it 'more gain the the energy of the plume than you would achieve by spending comparable mass on enlarging power plant and/or...
... must outperform an electric drive to be worthwhile. The ones which I imagine are pretty hard to get around are the expense of the propellant and the...
... If you can afford the extra mass, you might as well make your own tritium by blanketing your reactor with lithium. However, if you want a bare D-T...
... We're not talking about "efficient" fusion here, though. We're wondering about a fusion drive which only outperforms an electric drive. ... That's not at...
... Depends on what effort you go to to breed it. It's basically equal to the cost of neutron-irradiated lithium-6. The lithium is a couple hundred dollars per...
... Probably not. You can always cut down the amount of tritium you get by mixing in lithium-7; pretty sure neutron-irradiated lithium-7 turns into 2 * He4 +...
... This might be a bit thick for some folks, so let me summarize. Lithium 7 multiplies high energy fusion neutrons (but this takes energy - the multiplied...
The basic idea of an aeroscoop spacecraft is to scoop up molecules/atoms from Earth's upper atmosphere for use in Earth orbit. The obvious problem is that this...
I believe we had a posting on something similar about a month ago... http://www.spacedaily.com/reports/Slime_Worlds_999.html F.P. Kiesche III "Ah Mr. Gibbon,...
... That would be me. ... You can brew the stuff somewhere out in space with minimum environmental concerns. And the production cost of fuel has to be really...
... I would like to say I'm not trying to be snobby here. What I wrote would have made my eyes glaze over as well - it was quick to shoot the data off but...
Hmm...this same basic scheme can be used with Ganymede or Callisto to scoop up hydrogen directly from Jupiter's upper atmosphere. You can then aeroramjet to...
New book from the AIAA http://www.aiaa.org/content.cfm?pageid=360&id=1743 "Frontiers of Propulsion Science is the first-ever compilation of emerging science...
... I've been getting severe headaches trying to calculate out this orbital maneuver, because it's all skewed and inclined and all sorts of 3-dee-ish. Instead,...
... No no no! An outstanding quality of this board is that we get exactly that sort of detailed analysis. It isn't even particularly esoteric by local...
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