Monday, October 29, 2012

Return of Widom-Larsen; Revival of Cold Fusion / LENR



What is Widom-Larsen? Here is brief summary from Discover Magazine
Larsen considered other nuclear reactions that could subtly produce energy. One candidate was radioactive decay, which occurs when unstable atomic nuclei release energy in the form of radiation. Some elements found in nature, like radium, undergo this decay. Could something in the cold fusion apparatus be doing much the same? Larsen formulated a theory showing how that could happen, and in 2004 he recruited Northeastern University theoretical physicist Allan Widom to hone his ideas.

Their theory showed how a film of negatively charged electrons covering the palladium could combine with positively charged protons from the water’s hydrogen atoms to form neutrons. Those neutrons could then be gobbled up by nearby lithium nuclei, disturbing the delicate balance of protons and neutrons that keep the nuclei stable. The lithium nuclei would rapidly decay, first into beryllium and then into helium, and emit radiation. Finally, the film of electrons would absorb the radiation and reemit it as heat. Widom and Larsen called this chain of events a low-energy nuclear reaction, or LENR—a more accurate and palatable term than cold fusion. The European Physical Journal C published their theory in 2006.

The paper did not make a splash at first. By then, scores of wild-eyed papers had claimed to explain cold fusion. Yet Widom-Larsen theory had more going for it. For one, it had the authority of a respected theorist in Widom. It also had the ring of plausibility: It proposed a phenomenon permitted by the known laws of physics, no new science required. “Widom-Larsen theory is the best formulated explanation of what’s going on,” says Ephraim Fischbach, a Purdue University physicist who is not involved in LENR research.

In addition, Widom and Larsen theorized that the same neutron production process could happen in nature. Recently, scientists found one piece of supporting evidence for that. In March a study in Physical Review Letters described a large flux of neutrons during thunderstorms—perhaps, Larsen says, the result of LENRs in the atmosphere sparked by electricity from lightning.

As the Widom-Larsen theory gains traction, more physicists are emerging to put it to the test. In March, Yogendra Srivastava from the University of Perugia in Italy, who worked with Widom and Larsen on their theory, chaired a LENR-themed colloquium at CERN—the institution’s first official examination of “cold fusion” in more than two decades. Soon after, NASA released details on a $200,000-a-year research program on LENRs, led by Zawodny. “The theory made it past peer review in a real journal,” he says. “But I’m always skeptical. I only believe what I can prove.” _Discover
So far, LENR / Cold Fusion has only managed to heat a bit of water, and produce a little steam. But if engineers can take Widom-Larsen -- or something similarly plausible -- and learn to reliably produce significant amounts of heat, they might be able to create devices which could be scaled up and down for a wide range of commercial and scientific purposes.

One is not reassured by the antics of Andrea Rossi, but there are dozens of more sober scientists who are consistently reporting anomalous heat production using similar apparatuses.

More:

LENR Forum discusses this story

Widom Larsen Portal at New Energy Times

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3 Comments:

Blogger AlainCo said...

Thnaks to cover that subject.
WidomLarsen theory is a possible candiudate, but some have criticized the computations. WL have answered that the proposed alternative computation ignore the key idea of WL : collective behavior...
http://www.lenrforum.eu/viewtopic.php?f=44&t=47&start=20#p2686


National instrument seems to support Kim-Zubarev...
http://www.lenrforum.eu/viewtopic.php?f=44&t=51&p=1937#p1937
takhashi have it's own theory...
www.lenrforum.eu/viewtopic.php?f=44&t=187&p=1932#p1932

On the phenomenological side,Brillouin and Defkalion propose theories more rough and based on their engineering results....
quite compatible in a way

look at the Theoretical forum to see the mess it is
http://www.lenrforum.eu/viewforum.php?f=44

time is for engineering, theories later. as usual

1:54 AM  
Blogger Unknown said...

A comprehensive index and resource guide to technical and conceptual info about the Widom-Larsen theory of LENRs was updated through Sept. 4, 2012, and is available for online viewing or download at:

http://www.slideshare.net/lewisglarsen/lattice-energy-llc-index-to-documents-re-widomlarsen-theory-of-lenrssept-4-2012

Explanations of the underlying concepts and selected examples of experimental evidence for the Widom-Larsen theory of Low Energy Nuclear Reactions (LENRs) are provided in a number of different documents that have very different levels of technical difficulty --- some are extremely technical and highly mathematical, some are more-or-less ‘plain English,’ and others fall in between the two extremes.

Accordingly, this index has been created to help interested parties navigate through W-L’s theoretical concepts and relevant experimental data, contained in the above-noted documents, at a technical level with which they can feel comfortable.

Altogether, we believe that this collection of documents demonstrates that W-L theory successfully explains all of the key distinctive features of LENRs, e.g., absence of large fluxes of dangerous energetic neutrons and ‘hard’ gamma radiation; little or no production of long-lived radioactive isotopes, as well as other notable features such as laser photon triggering. We do this without invoking any ‘new physics’ beyond the Standard Model.

"Index" is an evolving document: it will be periodically updated and reposted to SlideShare as new documents become available and/or as concepts behind the W-L theory may expand further.

Lewis Larsen
President and CEO
Lattice Energy LLC
Chicago, IL USA

11:15 AM  
Blogger Unknown said...

A comprehensive index and resource guide to technical and conceptual info about the Widom-Larsen theory of LENRs was updated through Sept. 4, 2012, and is available for online viewing or download at:

http://www.slideshare.net/lewisglarsen/lattice-energy-llc-index-to-documents-re-widomlarsen-theory-of-lenrssept-4-2012

Explanations of the underlying concepts and selected examples of experimental evidence for the Widom-Larsen theory of Low Energy Nuclear Reactions (LENRs) are provided in a number of different documents that have very different levels of technical difficulty --- some are extremely technical and highly mathematical, some are more-or-less ‘plain English,’ and others fall in between the two extremes.
Accordingly, this index has been created to help interested parties navigate through W-L’s theoretical concepts and relevant experimental data, contained in the above-noted documents, at a technical level with which they can feel comfortable.

Altogether, we believe that this collection of documents demonstrates that W-L theory successfully explains all of the key distinctive features of LENRs, e.g., absence of large fluxes of dangerous energetic neutrons and ‘hard’ gamma radiation; little or no production of long-lived radioactive isotopes, as well as other notable features such as laser photon triggering. We do this without invoking any ‘new physics’ beyond the Standard Model.


"Index" is an evolving document: it will be periodically updated and reposted to SlideShare as new documents become available and/or as concepts behind the W-L theory may expand further.

Lewis Larsen
President and CEO
Lattice Energy LLC
Chicago, IL USA

11:20 AM  

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