Problems with yield in July/August?

[Brian H]

Aaron, what happened to the links to the patent and Technical Papers 1 & 2? I was going to refer someone to them, but they seem to have been purged from the site (and LPP’s, too). I found 3 FF papers under Eric’s name in the ArXiv.org listings, one of which is apparently Paper 1 http://www.arxiv.org/ftp/arxiv/papers/0710/0710.3149.pdf . But not sure which of the others, if either, is 2. And the patent no longer seems to be linked anywhere.

Even https://focusfusion.org/index.php/site/category/C73/ no longer shows them.

[AaronB]

Brian, please see Eric’s page at the LPP website. That should have everything you need.
http://www.lawrencevilleplasmaphysics.com/index.php?option=com_content&view=article&id=68&Itemid=86.

[MTd2]

“On the other hand, the value of n^2V—the density squared times the volume—was about ten times less than predicted. So these plasmoids are hotter and either less dense or smaller than predicted.”

https://focusfusion.org/index.php/site/article/lpp_presents_at_icops/

This is quite bad news. Very bad news. One less order of magnitude sounds too bad, even if instruments are not precise, it shows that scaling is not so good, and attaining positive net positive output will be much harder, if possible ever.

[AaronB]

MTd2, fusion requires high temperatures, high density, and enough confinement time for the particles to collide. If you have a higher temperature, the density or confinement time can be less, and you will still maintain the same amount of fusion going on. As the report said, the plasmoids were hotter than expected, and also either smaller or less dense than anticipated. Due to the limitations of the instruments, we don’t know for sure which it is, or maybe a combination of both. Either way, as the report also says, “That is exactly the scaling observed so far, and the absolute number of fusion reactions is just as predicted.” Once we start firing shots again with the better detectors, we’ll be able to see exactly what’s going on. I wouldn’t throw in the towel just yet. Things aren’t as bad as one isolated variable may seem to indicate.

[Brian H]

AaronB wrote: Brian, please see Eric’s page at the LPP website. That should have everything you need.
http://www.lawrencevilleplasmaphysics.com/index.php?option=com_content&view=article&id=68&Itemid=86.

I take it that “Prospects for pB11 fusion with the Dense Plasma Focus: New Results” is what usta be “Technical Paper 2”? But I don’t see any others on FF, though I have two others from ArXiv, “ADVANCES TOWARDS PB11 FUSION
WITH THE DENSE PLASMA FOCUS” (= Technical Paper 1?) and “Towards advanced-fuel fusion:
Electron, ion energy >100keV in a dense plasma” from the Texas experiments.

Which which is which, and what is the timeline? Is there any reason not to have these featured any longer on the home page?

[AaronB]

Brian, I don’t know which papers Rezwan had linked on the FFS front page, or where the links went. I would guess it was “Prospects for pB11 fusion with the DPF: New Results” and “Advances Toward PB11 Fusion with the DPF”, but I’ll defer to Rezwan for the actual answer. Those two papers will probably be more than enough to make your friend’s head spin. Not exactly light reading, but interesting. Good luck.

[Aeronaut]

Brian, all of the tech goodies you asked about and more are all filed under the LPPX tab in the black nav bar across the FFS home page. That links to this sub-index page: https://focusfusion.org/index.php/site/category/C30/

[Rezwan]

Aeronaut wrote: Brian, all of the tech goodies you asked about and more are all filed under the LPPX tab in the black nav bar across the FFS home page. That links to this sub-index page: https://focusfusion.org/index.php/site/category/C30/

Thanks Aeronaut. Yes, that’s where they are. I haven’t changed those links.

Aaron, Eric if you want me to add any other links there, let me know. I have, for example, the powerpoint of the ICOPS presentation.

[Brian H]

Aeronaut wrote: Brian, all of the tech goodies you asked about and more are all filed under the LPPX tab in the black nav bar across the FFS home page. That links to this sub-index page: https://focusfusion.org/index.php/site/category/C30/

Aha! LPPX — I hadn’t appreciated that link and label before. Thx muchly.

But it’s odd — I used the “Search” Function several times and came up blank. Maybe I misspalled Techinal, or somethung. :red:

[Aeronaut]

I can relate, Brian. I had to systematically explore every nook and cranny of the nav bar after the site was re-organized. I recommend that to everybody- there’s a lot of material on this site, and the search function on this and other PHP sites does seem to have blind spots.

[Author]

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