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- From: higgins@fnalf.fnal.gov (Bill Higgins-- Beam Jockey)
- Newsgroups: sci.space
- Subject: Antiproton efficiency (was Re: *** BUSSARD RAMSCOOP ***)
- Date: 11 Jan 93 19:45:31 -0600
- Organization: Fermi National Accelerator Laboratory
- Lines: 31
- Message-ID: <1993Jan11.194531.1@fnalf.fnal.gov>
- References: <93007.120340DOCTORJ@SLACVM.SLAC.STANFORD.EDU> <1993Jan8.032819.2268@bby.com.au>
- NNTP-Posting-Host: fnalf.fnal.gov
-
- In article <1993Jan8.032819.2268@bby.com.au>, gnb@baby.bby.com.au (Gregory N. Bond) writes:
- >>>>>> On Thursday, 7 Jan 1993 12:03:40 PST, Jon J Thaler <DOCTORJ@SLACVM.SLAC.STANFORD.EDU> said:
- > Jon> This is about 13 orders of magnitude larger than the total number of
- > Jon> antiprotons ever created and stored (about 10**14)
- > So, even assuming 100% conversion efficiency, 1kg of antimatter =
- > 10^19 Joules, or about 300 years output from a 1GW coal or nuclear
- > power station, to produce. It will release twice this amount when
- > mixed with ordinary matter.
- >
- > Now if we could generate antiprotons with better than 50% efficiency,
- > we have an inexhaustible energy supply......
-
- As Jon pointed out, you gotta conserve baryon number by all known
- processes for creating antimatter (the monopole catalysis Henry
- discussed is *highly* speculative and unproven). So you can't do
- better than 50%... and in fact...
-
- > Anyone have estimates on the realistic estimates on achievable
- > conversion efficiency? 10^4?
-
- Yes, Bob Forward says the paper limit is 10^-4. :-( That's with perfect
- collection of *all* antiprotons emerging from the target at all angles
- and momenta. If your p-bar factory is in the real world, your
- efficiency will be somewhat lower (Fermilab's is around 10^-9).
-
- Bill Higgins, Beam Jockey | "I'm gonna keep on writing songs
- Fermilab | until I write the song
- Bitnet: HIGGINS@FNAL.BITNET | that makes the guys in Detroit
- Internet: HIGGINS@FNAL.FNAL.GOV | who draw the cars
- SPAN/Hepnet: 43011::HIGGINS | put tailfins on 'em again."
- --John Prine
-