home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!ogicse!das-news.harvard.edu!cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!webb+
- From: webb+@CS.CMU.EDU (Jon Webb)
- Newsgroups: sci.physics.fusion
- Subject: Re: Webb is right
- Message-ID: <C02uMn.CKC.1@cs.cmu.edu>
- Date: 30 Dec 92 14:51:59 GMT
- Article-I.D.: cs.C02uMn.CKC.1
- References: <921229215812_72240.1256_EHL60-1@CompuServe.COM>
- Sender: news@cs.cmu.edu (Usenet News System)
- Organization: School of Computer Science, Carnegie Mellon University
- Lines: 79
- In-Reply-To: 72240.1256@compuserve.com's message of 29 Dec 92 23:38:16 GMT
- Originator: webb@DUCK.WARP.CS.CMU.EDU
- Nntp-Posting-Host: duck.warp.cs.cmu.edu
-
- In article <921229215812_72240.1256_EHL60-1@CompuServe.COM> 72240.1256@compuserve.com (Jed Rothwell) writes:
-
- "Basically, you seem to believe every paper published that claims a positive
- result for cold fusion, and disbelieve every paper that claims a negative
- result." Good Grief no!
-
- Well, I must have misunderstood your posts. What cold fusion
- phenomena *do you* believe in, and what don't you believe in? You
- seem to accept all the positive Japanese results at face value, and
- also Mills and Farrell. What class of cold fusion phenomena does that
- omit?
-
- "You claim that anyone can get 90 sigma..." That is the craziest thing I have
- ever heard. That is like claiming that anyone can build a functional RAM chip
- in their basement.
-
- You *did* say, "Any fool can measure 90 sigma." Perhaps I'm
- misinterpreting your statement, but, to me, that sounds like what I
- said.
-
- "The scientists you cite as skeptics look at the history of cold fusion
- experiments and see this pattern over and over: someone claims a positive
- result, then withdraws it later (or it just somehow disappears, being
- reported at a conference and then never heard from again)..."
-
- I hear from everyone in the field, at regular intervals. Whenever I call or
- fax, they tell me what they are up to. Who the Hell are you talking about?
-
- Many many early cold fusion results were withdrawn. As for results
- that have disappeared, there are the China Lake results, for example.
- Also a year or so ago there was a place in central Florida claiming
- easy cold fusion through stimulation by radiation, and we've never
- heard from them again. Even McKubre has not seen fit to publish in a
- journal.
-
- "Or someone claims to have gotten cold fusion to work, then can't get it to
- work anymore..." What do you mean "anymore?"
-
- I mean never again, despite the most careful effort. E.g., Huggins.
-
- "Or someone tries a cold fusion experiment with apparently careful technique,
- and it doesn't work..." Who did you have in mind?
-
- I mean many many experiments that you can find in Dieter Britz's
- bibliography. There are several instances where someone put together
- a good team of electrochemists and physicists and couldn't get the
- thing to work.
-
- I don't know
- anything about He3 or gamma rays, though, and you left out the single most
- important, most overriding and undeniable product; the key to the whole
- riddle:
-
- Heat
-
- Don't forget that! It is the easiest thing to measure, and the most
- conclusive, by far.
-
- Actually, it's not that easy to measure. You have a system into which
- you're putting a certain, fairly large, amount of energy, and in which
- you want to measure the excess energy emerging. But (partly depending
- on where the system is open or closed) some of the energy is going
- into evaporation, some is going into disassociation of water, some is
- going into the palladium as it absorbs hydrogen or deuterium
- (apparently this is sometimes endothermic, sometimes exothermic), some
- is going into or emerging from various chemical reactions, some places
- in the experiment are hotter than others, etc., etc.
-
- By contrast, a detector of radiation products can be made far more
- reliable, since it gives a signal that has few other sources in the
- environment (namely cosmic rays or radioactive impurities in the
- experiment, which can be dealt with by various means), and which
- emerges instantaneously, in the case of gamma rays and neutrons. If
- the experiment produces radiation or He3 or tritium that wasn't there
- before, and it didn't come from cosmic rays or radioactive impurities,
- well, then, you've got a success. No messing around with figuring the
- heat balance or worrying about turbulence or anything else.
-
- -- J
-