[AR] Re: Quiet times, so OT question
- From: roxanna Mason <rocketmaster.ken@xxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Fri, 16 Dec 2022 10:52:36 -0800
Wait until we mine H-3 on the moon, later-on asteroids, then we'll have
lots of fuel.
I put my bets on Tokamak, the infrastructure for lasers is too big and
sensitive to misalument and contamination.
Ken
On Fri, Dec 16, 2022 at 7:12 AM Henry Spencer <hspencer@xxxxxxxxxxxxx>
wrote:
On Fri, 16 Dec 2022, Bill Bruner wrote:
P.S. - also, once we shrink the lasers, ICF has a lot of potential for
space propulsion, too.
Although we'd need to get it up to doing at least the D-D reaction. D-T
is pretty much impractical for propulsion, since 80% of the energy comes
out as high-energy neutrons, which are useless for propulsion and a major
hassle. (Absorbing them, to convert the energy into heat, takes way too
much mass because they're so difficult to stop.) Need a reaction that
puts more of its energy into charged particles and less into neutrons; D-D
isn't great but it's better, and the low-neutron reactions are even harder
to ignite.
Henry
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