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In article , Douglas
Eagleson wrote: James Logajan wrote in message 5... (Douglas Eagleson) wrote: An interaction of the fusion type is often considered a quite by the book thing. Meaning the crossection for the interaction is looked up and the proper reaction is selected. Are you trying to say that reaction cross sections are established by experimental measurements or by computation from first principles? Where, after all, do you suppose those alleged "book" values come from? In quantum theory the book is irrelvant and the scientist must use theory to calculate the allowed interaction. Meaning the ability to fuse is in theory, and is always calculatable. Sorry, the above doesn't make any sense. So if the interaction is allowed energetically and it is not in the books a discovery is possible in nuclear fusion science. Many odd reactions will appear. Odd, odd reactions where a small endothermic threshold exists. So is there a computer program that spits out the answer for postulated reactions? Or is hand calculation still necessary? The assertions you've written make very little sense, yet are presented as if they were widely agreed upon. So it is not surprising you've gotten some hostile responses from some knowledgeable people. Also, why would you think that something could be "hand calculated" and yet could not be done on a computer? So were you really trying to ask: "My understanding is that fusion reaction cross-sections are experimentally measured and generally not computed from first principles. If one did compute from first principles isn't it possible that many odd reactions would appear in the results? Are there any programs available that can do these computations, and do them in reasonable amount of time?" Well, you finally got the point of my question. Does anybody have a quantum field theory to calculate the energetics of fusion and not its crossection type probability. That is a fundamental type question requiring a knowledgable person. Douglas Eagleson Gaithersburg.MD USA Well, James Logajan, got a bit into what you've been trying to ask; and let me see if I can get a bit further. I have quantum model based upon the axiomatic principle: 1) quantum particles can only have motion with respect to other quantum particles and not with respect to any arbitrarily contrived coordinate system; this axiom coupled with Maxwell's equations demonstrate that quantum particles which are overlapping in momentum space (approximately at rest with respect to each other) must behave opposite to the expectations of Coulomb's law. When you write the word 'energetics' then you must be specific because such a term, while it may sound impressive to a layman, really can be a null content word unless you define it precisely. As near as I can tell, you're wondering if the actual details of how nuclear fusion works is disclosed in fusion cross section data. The answer is no. It is all statistical even though there is a popular mental model which is subscribed to by nearly all nuclear fusion scientists and engineers. That mental model is, in fact, the basis for engineering efforts and design even for fusion weapons. They assume the mental model is correct when, in fact, the basic axiom of quantum motion specified above coupled with Maxwell's equations demonstrate unequivocably that it is not correct. According to Glasstone and Lovberg in Chapter 2 of the report "Controlled Thermonuclear Reactions" prepared under the auspices of the AEC in 1960 "...experiments made with accelerated nuclei have shown that nuclear reactions can take place at detectable rates even when the energies are considerably below those corresponding to the top of the Coulomb barrier. In other words, there is no threshold energy, determined by the maximum electrostatic repulsion of the interacting nuclei, below which the fusion reaction will not occur. Such behavior, which cannot be explained in terms of classical mechanics, can be interpreted by means of wave mechanics. It can be shown that there is a certain probability that two nuclei will combine even though they do not have sufficient energy to surmount the Coulomb barrier. This effect is commonly referred to as 'barrier penetration'. " So, on this basis they have experimental data that confirms that particles undergo nuclear fusion without following the mental model of energetic collisions which purportedly allow such near approaches between nuclei that they are in range of the so-called 'nuclear strong force'. So, here's this 1950's data which absolutely demonstrates that fusion fuel nuclei can achieve fusion without first having to crash into each other with the terrific velocities afforded by high temperatures. But instead of dealing with this in a rational manner the ostriches stuck their heads in a mathematical sand and were content to give the process a name. They called it barrier penetration, quantum tunneling, wave mechanical tunneling, etc. But these were all just labels or names given to a process that they didn't have the least idea about how it actually occurred. They substituted a statistical prediction for knowledge and a name for a process they didn't understand hoping, somehow, that if you give it a name that this means that you understand it. This only confirms that most physicists are either taxonimists or mathematicians. Now everyone knows that statistics by nature does not deal with knowledge of discrete processes but rather with calculating numbers of events. By observation and data collection on a street corner we can get statistical predictions related to the color of the average cat which will come around the corner next but one cannot predict with certainty anything at all about the color of the next cat to come around the corner or even if there will ever be another cat to come around the corner. But statistics is a like a heavily perfumed attractive woman. She can lure you into almost anything if your brain isn't working. But for the true researcher...well, he has his eyes on a different prize. He really wants to know about the mechanics of it all...not about the mathematical manipulations or statistics but the actual physical processes. That one little paragraph by Glasstone and Lovberg shows that there's a huge gap in understanding the interactive behavior of charged particles. But this goes beyond nuclear fusion but really overlaps into other subdisciplines of physics like superconduction. Philip Anderson, the Nobel prize winning physicist from Princeton University explains, "What is clear is that the two decades or more of efforts to fit all these phenomena into a Fermi liquid description are a catalogue of failure, and it is time we opened our minds to new ways of thinking." " But physicists have learned to be comfortable because physicists these days are generally no longer physicists but mathematicians and they've transmorgified the notion that physicists ought to have exact ideas about physical events and processes into the idea that mathematical ideas and results are the physics. How it got to be this way is well documented in the history of early twentieth century physics. But now we're paying the price for this level of intellectual fraud. We could have clean working nuclear fusion but the mainstream society of gov't supported fusioneers have become an army of welfare queens in white coats continue to spend the taxpayer's monies on attempting to engineer processes for which they lack a proper physical model. Charles Cagle |
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