Helium fusion?

It may be difficult to separate "theory" from "application," but let''s see if this helps facilitate the discussion.
Post Reply
Posts: 86
Joined: Sun Oct 23, 2011 6:50 am
Real name: Alexander Biersack

Helium fusion?

Post by ab0032 » Sat Jan 05, 2013 11:57 am

I ran across this link and found it interesting: http://www.diane-neisius.de/fusor/index_E.html#intro

User avatar
Richard Hull
Posts: 11734
Joined: Fri Jun 15, 2001 1:44 pm
Real name: Richard Hull

Re: Helium fusion?

Post by Richard Hull » Mon Jan 07, 2013 9:05 pm

I found this among the more interesting expositions eluded to in this forum in a long time.

The basic premise of fusing He4 seemed ridiculous at the amateur level and I almost stopped reading the flow, but ultimately, her treatment of the mathematics, in spite of her bold and often dreamy assumptions, was rare and fine. No dummy work here, just lack of experience from the hands-on involving fusion.

Blessedly, she perservered with true hands on and learned via the good old school of hard knocks that the math and assumptions just weren't following through. Too many assumptions needed through too many mathermatical iterations carried on a geometrically growing error result. She also reported, having learned the hard way, all of the issues associated with plasmas, vacuums and operational issues so hard won here.

The pulsed fusor was a bold bit and we have discussed that a great deal in the past.

Again, nothing wrong with the math, per se, nothing wrong with the concept, at its core, but inspite of the abject failure of the 4He fusion effort, for all the work over what seems like a few years, she can now hold her own with any fusioneer on theory and many operational aspects. It is a pity there was no instrumentation or deuterium at hand for her. She has the "right stuff" and I am sure she could have fused, had some crtical road blocks not limited her efforts. (deuterium fusion, of course....Not 4He)

As is usually the case, I did not check to see if she was ever here as a sign-in, but I am tempted to induct her into the plasma club, If I have not already. Rare to see this level of work and effort over a period like this. Very well done and very well presented.

Thanks Alexander for posting this. It was worth the read and inspiring, for sure.

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

User avatar
Chris Bradley
Posts: 2930
Joined: Fri May 02, 2008 11:05 am
Real name:

Re: Helium fusion?

Post by Chris Bradley » Mon Jan 07, 2013 10:06 pm

Yes, we have discussed 'laser Diane's' work before, here.

The thing with the 'tri-alpha' reaction is that it is a 3 body reaction. It may well be possible to access the 4He+4He->8Be fusion, but as it splits back into two He's again in ~attoseconds it is, at any practical amateur level at terrestrial plasma densities, virtually indistinguishable from a Coulomb collision between the He's! Maybe there are, indeed, millions of 8Be/s being generated in a helium fusor at a modest multi 10's kV ... but you'd never know!!!!

In a star, the density is so high that during an 8Be's attosecond lifetime there is a 'real' possibility that another 4He will come along during that lifetime and make it up to 12C. At amateur plasma densities?.. forget it!

Is there any way of detecting the creation of an 8Be during its attosecond lifetime?? I can't see how ....

Post Reply