Historical research guide · 0602 · 2015
Lessons from Cold Fusion Archives and from History
Jed Rothwell
In one minute
Jed Rothwell keeps the LENR-CANR archive, about two thousand papers on cold fusion, and this is what he says the collection teaches. First, the field looks chaotic, and that is what an emerging science looks like: he sets it beside Hahn and Meitner’s early uranium work, a mixture of error and truth that took years to sort out. Second, the archive already shows the effect is real and shows how to repeat it — the trick is almost entirely in the metal. Miles found that palladium from Johnson Matthey, a 1930s hydrogen-filter alloy Fleischmann asked for by name, produced ten times the heat of other sources. Storms screened ninety foils for a year and found four good ones. Third, most failures are homework failures rather than physics: read the literature, then bring in an electrochemist. Fourth, and hardest, watch for the assumption nobody in the room has noticed they are making.
Connection
Chapter 12 depends on whether excess heat in a loaded lattice is a real, repeatable effect, and Rothwell answers with the practical form of that question: what does it actually take to reproduce one of these experiments, and which published papers tell you? For chapter 1 this is a working example of how an evidence ladder is climbed in a field where the material, not the theory, is the variable — and a warning about the unexamined assumption that keeps a whole field looking in the wrong place.
From the source
The published record already establishes the effect: Fritz Will’s 1990 list named 92 researchers reporting positive results, and Heinz Gerischer, then director of physical chemistry at the Fritz Haber Institute, reviewed the evidence in 1991 and concluded there are ’now undoubtedly overwhelming indications that nuclear processes take place in metal alloys’.Section 3, Cold Fusion is Real, citing references 2 and 3
Rothwell’s answer to Graham Hubler’s three-part test — more reproducibility, proof the heat is nuclear, or a viable model — is that two of the three are already in hand: the tritium, and the heat correlated with helium, together show the effect is nuclear, while a viable model is still missing.Section 3, closing paragraphs
The variable that decides success is the metal itself. In Miles’ comparison of palladium from different suppliers, Johnson Matthey material — the alloy the company developed in the 1930s for hydrogen filters, and which Fleischmann asked for on their recommendation — produced 3 to 15 watts per cubic centimetre, about ten times the others, while palladium from miscellaneous sources produced nothing.Section 4, How to Replicate Cold Fusion, citing reference 4
The archive contains a working replication procedure across three papers: Miles and Johnson on the helium-heat correlation and the material, Cravens on preparing the cathode — polish to a mirror finish, wash with acetone, never touch it with fingers or tissue, load slowly — and Storms on screening, who tested ninety Tanaka foils over about a year, rejected any that swelled more than 2 percent on first loading, and found four that produced robust heat repeatedly.Section 4, the three papers and the Storms screening account, citing references 4 to 6
The best results on record came from Fleischmann and Pons’ work in France with Toyota using that palladium and those techniques: 294 megajoules of excess energy at 101 watts in experiment 3, and 250 percent excess in experiment 4.Section 4, citing reference 7, the ICARUS 9 results at IMRA Europe
Failures divide into two kinds, and both are useful. Amateur mistakes are homework failures — at Kamiokande the particle detection was superb while the cells were run at high voltage from the start, wired on one circuit, and handled with bare fingers on national television, with no electrochemist consulted. A noble failure is Srinivasan spending six months at SRI trying to replicate his own BARC nickel-light-water heat and concluding it was recombination. Success comes through failures of the second kind.Section 5, Failed Experiments; Section 6, Unfounded Assumptions
The way in
https://doi.org/10.70923/001c.72348How to cite it
Jed Rothwell (2015) Lessons from Cold Fusion Archives and from History doi:10.70923/001c.72348