At 02:58 pm 17-02-05 -0800, Jones wrote: >One wonders, if the BBC really wanted to present a fair >picture of the "DREAM" of the low energy fusion, which is >the whole range of LENR - and not just this particular >device, why they did not also look at the Fusor: >http://fusor.net/ >http://www.kronjaeger.com/hv-old/fusor/construction/ > >If neutrons are all they want to find as proof, these Fusor >things are great robust neutron sources, have been built for >a few thousand dollars, and with absolutely no doubt where >the strong source of neutrons is coming from. And they >consume less power than an oven. Even LENR skeptic Scott >Little built one that can produce more cumulative neutrons >than many Tokomaks have. > >Guess the answer is, that the BBC was not interested in >fairness. Or hopefully, they will add another episode and >look at the Fusor and the IPI device. > >BTW earlier I misstated that: > >> The Fusor of Miley, Hull etc. has demonstrated rather >> conclusively that head-on D fusion of the "warm" ICF >variety >> requires a minimum of 10 keV per particle. > >This is incorrect. The Farnsworth-type Fusor (warm fusion) >uses 10-25 kilovolt input voltage to the grid itself. >However, the average plasma temperature itself is less than >5 eV. > >In hot fusion the average plasma temperature will be in >multi-keV range, which is more than a thousand times higher >than in the Fusor. > >The Fusor can produce 10^8 neutrons per second using >tritium, and even small Fusors can produce 10^5 neutrons per >second using no tritium. This is far away from net energy >breakeven, but it could be quite useful to effectively >provide the required make-up neutrons for a subcritical >fission reactor. In fact, just using Uranium for the >containment structure of a fusor, with a thick external >graphite moderator, will get pretty close to breakeven >because of the multiplication ratio. > >In sonofusion, especially using cold acetone, the average >temperature of the working medium is far less than 1 eV. The >UV light emitted would indicate that high temperature occurs >inside the bubble, but that could be secondary re-emission, >after the fusion has already occurred. Sonofusion is not >claimed to produce the anywhere near the neutrons of the >Fusor, but, why didn't the BBC spring for the IPI device? >Maybe on rental, if cost was the issue ($250,000 US) - that >is, if they were interested in a fair story. Maybe Tessien >would even guaranteed a certain amount of neutrons and lend >them one - just for the publicity. that would assume that >the BBC had done its homework, which is not the case. > >It has been claimed that in sonofusion, the tritium and 3He >ash are produced in equal quantities, as in hot fusion. This >can be the case but often it is not the case, depending to >some degree on the average temperature of the working >medium, as the Taleyarkhan article indicates. > >I think that there are three different fusion regimes, cold, >warm and hot; and that it is a mistake to try to classify >the Fusor and sonofusion as "hot fusion" devices just >because the fusion ash can sometimes look like the ash from >hot fusion. The ash can or cannot look the same, depending >on circumstances. > >If this creates con-fusion, then that only means that you >cannot say warm fusion without saying confusion. > >Jones > >Hey Frank, does the BBC have a "complaints" department that >I can send this message to?
It sure does. 8-) http://www.bbc.co.uk/complaints/ Cheers Frank Grimer
