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- Newsgroups: sci.space
- Path: sparky!uunet!spool.mu.edu!yale.edu!yale!gumby!destroyer!cs.ubc.ca!fs1.ee.ubc.ca!davem
- From: davem@ee.ubc.ca (Dave Michelson)
- Subject: Re: *** BUSSARD RAMSCOOP ***
- Message-ID: <1993Jan4.212241.26630@ee.ubc.ca>
- Organization: University of BC, Electrical Engineering
- References: <C0937v.FvM@zoo.toronto.edu> <J85swB3w165w@tradent.wimsey.bc.ca>
- Date: Mon, 4 Jan 1993 21:22:41 GMT
- Lines: 49
-
- In article <J85swB3w165w@tradent.wimsey.bc.ca> lord@tradent.wimsey.bc.ca (Jason Cooper) writes:
- >> Not good enough, alas. The pressure at the *center of the Sun* produces
- >> only the most sluggish hydrogen reaction -- one that will take billions
- >> of years to consume the Sun's hydrogen supply.
- >>
- >> Ordinary hydrogen burns quickly in thermonuclear reactions only under
- >> near-supernova conditions. The heavier isotopes used in fusion bombs
- >> burn like gasoline by comparison, to the point where they are distinctly
- >> rare in the universe -- even the small supply existing on Earth requires
- >> significant effort to explain.
- >>
- >> Building the ramscoop itself is the easy part (difficult though it is).
- >> Getting the hydrogen to *do* something useful, once collected, is hard.
- >> Using it as reaction mass for an antimatter-powered jet engine is going
- >> to be much easier than trying to burn it raw.
- >> --
- >> "God willing... we shall return." | Henry Spencer @ U of Toronto Zoolog
- >> -Gene Cernan, the Moon, Dec 1972 | henry@zoo.toronto.edu utzoo!henry
- >
- >Ah, but that would defeat the entire purpose of the ramjet itself! You
- >are now carrying around a mass of fuel equal to what you are going to tak
- >in in the scoop. Now we get into all of the standard limitations, as the
- >faster you want to go, the heavier the ship's going to get, the more fuel
- >you'll have to carry, the heavier the ship's going to get, etc. ad
- >infinitum. The *REAL* advantage of the ramjet is that this is not
- >happening. The fuel is just waiting out there, and it just so happens
- >that the faster you go, the more you're going to collect.
- >
- >Of course, I'm not using the p-p fusion until I'm into the speeds where
- >the beta- decomposition involved is not a problem probability-wise, due
- >to the large number of chances it will have. How's a carbon-catalyzed
- >reaction sound for getting there (except at the lower end, where we'll
- >have to use some conventional engine to attain a speed at which THAT
- >reaction is possible)?
- >
- > Jason Cooper
-
-
- Good grief, guys. Since we're speculating all over the place here about
- science-yet-to-come, why not build a quark-catalyzed ramscoop. All the
- advantages of muon-catalyzed fusion except that the Quark doesn't decay.
- All you have to do is crack open a hadron! If you want more details,
- please let me know and I'll post them. (I'm only half joking, by the way.
- Quark-catalyzed fusion is a "serious" possibility if quarks can be unbound.
- Emphasis on the if.)
-
- --
- Dave Michelson
- davem@ee.ubc.ca
-