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- Path: sparky!uunet!munnari.oz.au!network.ucsd.edu!lyapunov.ucsd.edu!mbk
- From: mbk@lyapunov.ucsd.edu (Matt Kennel)
- Newsgroups: sci.physics.fusion
- Subject: Sonoluminesence and fusion
- Date: 11 Jan 1993 03:21:56 GMT
- Organization: Institute For Nonlinear Science, UCSD
- Lines: 60
- Message-ID: <1iqp4kINNmb8@network.ucsd.edu>
- NNTP-Posting-Host: lyapunov.ucsd.edu
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-
- I think we can get some reality-checks on acoustically generated fusion
- by comparing it to the results from known inertially confined fusion
- results. Specifically, I remember a few things from the Physics Today
- article a few months ago about ICF.
-
- For it to work, the DT fuel must be compressed to nearly Fermi
- degeneracy. This compression happens on timescales of a few nanoseconds,
- I believe. The central problems are (of course) the zapper technology,
- and fluid instabilities in the compressing plasma fuel.
-
- Can sonoluminesence come close to these parameters? It seems unlikely.
-
- Now---what about that "dynamical analogue to the Casimir effect" proposed
- by Schwinger. It seems that this might play a significant role in
- ICF fusion, considering the speed and violence of the process.
-
- I gather the idea is that photons may somehow be radiated by a rapidly
- compressing conductor (the plasma) changing the "eigenfunctions" of the
- EM field inside, resulting in differing "zero-point" energies. Thus,
- may the ICF compression in some way extract energy from the vacuum? Or
- at least use the energy generated that way in getting closer to
- the conditions needed for fusion.
-
-
- It's been recently revealed that hydrogen nuclear weapons work on the
- same principle (or really vice versa) as ICF. (which means of course
- that thermonuclear weapons aren't really thermonuclear at all, but
- more really pyconuclear---government misinformation, I wonder)
-
- Might this postulated Casimir effect play a big part there? Might
- hydrogen weapons get part of their energy from the vacuum?
-
- That would be of course totally far out, but that's exactly how insiders
- described the discovery by Teller & Ulam. Hans Bethe wrote (in 1954, but
- not published until 1982)
- "The new concept was to me, who had been rather closely associated with
- the program, about as surprising as the discovery of fission had been
- in 1939. Before 1939 scientists had a vague idea that it might
- be possible to release nuclear energy in 1939, they would have worked
- on anything else rather than the field which finally led to the discovery
- of fission, namely radiochemistry."
-
- It's been described as "very interesting physics".
-
- Compressing something with radiation pressure may be pretty bold to begin
- with, but would that be incredibly surprising to somebody like Hans
- Bethe, who was working on the project himself?
-
- Any back-of-the-envelope calculations, anyone?
-
-
- In the same article, HB concludes with "In summary I still believe
- that the development of the H-bomb is a calamity."
-
- --
- -Matt Kennel mbk@inls1.ucsd.edu
- -Institute for Nonlinear Science, University of California, San Diego
- -*** AD: Archive for nonlinear dynamics papers & programs: FTP to
- -*** lyapunov.ucsd.edu, username "anonymous".
-