In this space, visitors are invited to post any comments, questions, or skeptical observations about Philo T. Farnsworth's contributions to the field of Nuclear Fusion research.
Subject: Re: High pressure D2 fusion
Date: Oct 28, 11:48 pm
Poster: Richard Hull
On Oct 28, 11:48 pm, Richard Hull wrote:
>The threshold and slope of the Maxwellian distribution curve for actual D+D fusion is much too high to support the results that have been reported by Fusor enthusiasts, whether they be university affiliated or stark amateurs.
Fusor operators here have reported not much more than 10e5 neutrons/sec emitted from their fusors. This is a very small amount of fusion considering the pressure in the reaction zone which is 2-4 orders of magnitude above that of the tokomak effort.
The tokomaks and most all of the fusion machines built for power fusion attempts have all been maxwellian heat devices. They have sought to instantly heat and contain the entire volume of gas of the fusion chamber to fusion temperature. They are not accelerators or colliders or focused devices. They are like your arc lamp, they are thermally driven and suffer under the maxwellian curve where only the hottest few ions on the tail are at fusion temperature. (in their case only - the lamp just doesn't hit the mark due to low voltage across the lamp plasma.)
The fusor is a device working in velocity space and is a focused accelerating collider. Only the central region is a reaction zone. The rest of the device is cold. A 30kv fusor works not at the 60kev deuteron part of the cross sectional fusion D-D curve but much higher up due to the focused collsional nature of the device - Also discussed at length here in the past. Lamps, tokomaks, etc don't have this advantage. 30kv into a tokomak, that is actually across the chamber, and you have no more than 30kev deuterons. 1kv across a lamp, (and this must be the actual voltge across the lamp as current flows in the plasma), and you can never exceed 1kev energy for any deuteron. This will not even be the case in the lamp if it is pressurized as such arc lamps are.
As not one human being has posted on the energy required to strip neutrons from deuterons I hold it out as a maybe as no data has been forth coming. I have written and contacted many labs and phyicists on this and consulted a number of books. Not one scientist had a clue as to what energy would be required. The binding energy of the deuteron is such that a successful striping operation would be a net energy producer nearly rivaling fusion itself.
There is zero evidence regarding accelerated decay and zero data on low z fission which is just striping times two.
When one does the math and allows for the collisional focused nature of this device and the reduced volume of the reaction zone, using the D-D cross section curves, the amount of neutrons seen is not far from the predicted amount due to FUSION.
Folks can claim it is striping but give us a number! A striping cross sectional curve with input energy graph, and we can compute form there to see what gives. Thus far it has been hand waving and supposition. The early days of fusion at the big labs they also worried about stripping, but when I contacted them, they all professed no knowldge of the process. (Princeton has the ask a scientist section) They answered my collisional question, but were silent on the stripping issue.