Search found 2830 matches

by Giorgio
Tue Mar 23, 2021 9:22 pm
Forum: News
Topic: 2021 state of the horse race: ITER vs. dark horses
Replies: 34
Views: 3587

Re: 2021 state of the horse race: ITER vs. dark horses

Simulations are great, if the data they are based on is correct. If you feed them with the wrong assumptions, the result will also be wrong. Perfectly correct, and that's all there is to say on the actual state of fusion research. Too much dependence on "simulation grants" and not enough engineers ...
by Giorgio
Wed Mar 17, 2021 7:41 pm
Forum: Theory
Topic: Tokamak reactors could be practical with this one weird trick
Replies: 12
Views: 1861

Re: Tokamak reactors could be practical with this one weird trick

I think the fact that some other fusion researcher thought of it first shows it's an idea that is (or was) worth trying out. I'd be interested in seeing what the actual experimental results were, and what the rationale was for not pursuing it further. There's a difference between "We already tried ...
by Giorgio
Thu Mar 11, 2021 11:58 am
Forum: Theory
Topic: Tokamak reactors could be practical with this one weird trick
Replies: 12
Views: 1861

Re: Tokamak reactors could be practical with this one weird trick

Here it is:

Design study of electrostatically plugged cusp fusion reactor.
https://www.osti.gov/servlets/purl/7132575

Pages from 52 to 56 gives a clear idea about the concept.
by Giorgio
Thu Mar 11, 2021 11:15 am
Forum: Theory
Topic: Tokamak reactors could be practical with this one weird trick
Replies: 12
Views: 1861

Re: Tokamak reactors could be practical with this one weird trick

I remember that I read before about such an idea in a design proposal of the 70's. They actually tried some experimental tests later on but the results was not convincing and the idea was dropped. I don't remember if the issues was due to the theory not matching the experimental results or if the te...
by Giorgio
Tue Feb 23, 2021 9:38 am
Forum: News
Topic: More Helion Energy news....
Replies: 243
Views: 201791

Re: More Helion Energy news....

2. That divertor has a molybdenum-coated wall. 3. They have issues with high velocity plasmas causing arcing and erosion on that molybdemium coated wall. I am actually surprised that they are still experimenting with molybdenum coated divertors, this is stuff from 1980's and 1990's. There is alread...
by Giorgio
Mon Jan 25, 2021 10:26 pm
Forum: News
Topic: Polywell: "Final nail?"
Replies: 14
Views: 4044

Re: Polywell: "Final nail?"

RERT wrote:
Mon Jan 25, 2021 10:22 pm
Edits could be proposed for the Wikipedia page...
Indeed, but I have no idea how the procedure works.
If someone knows how to do it than changes should be done as that section is highly misleading.
by Giorgio
Mon Jan 25, 2021 11:48 am
Forum: News
Topic: Tokamak Energy news
Replies: 125
Views: 146014

Re: Tokamak Energy news

The direct conversion unit is still totally theoretical until now, so I would not dismiss it as a "solved issue", and this includes also the re-circulation of the injected power.
Selling Tritium could indeed be a good source of income for pushing the financing of additional research funds.
by Giorgio
Mon Jan 25, 2021 10:15 am
Forum: News
Topic: Polywell: "Final nail?"
Replies: 14
Views: 4044

Re: Polywell: "Final nail?"

I went to quickly read it back to refresh my memory. Here is the paper for everyone to read: https://ses.library.usyd.edu.au/bitstream/handle/2123/21070/bowden-reid_rd_thesis.pdf?sequence=1&isAllowed=y The Apparatus description and experimental runs start from page 53 And here is a passage of the la...
by Giorgio
Mon Jan 25, 2021 10:01 am
Forum: News
Topic: Polywell: "Final nail?"
Replies: 14
Views: 4044

Re: Polywell: "Final nail?"

If it's the final nail in the coffin for the Polywell, is it also the final nail for Lockheed Martins experiment, they have a lot in common. Did the paper also look at the results from the last EMC2 WB-X device? The test apparatus of the paper was just two magnetic coil rings parallel to each other...
by Giorgio
Wed Jan 20, 2021 11:43 pm
Forum: News
Topic: Polywell: "Final nail?"
Replies: 14
Views: 4044

Re: Polywell: "Final nail?"

I would say no. The experimental apparatus is different from a Polywell machine and the power and energy configurations are also order of magnitude smaller. The conclusions and explanation on why he didn't measure a potential well with this apparatus are indeed interesting. Interesting also the deri...
by Giorgio
Wed Jan 20, 2021 8:59 am
Forum: News
Topic: Tokamak Energy news
Replies: 125
Views: 146014

Re: Tokamak Energy news

Indeed Helion does not have to bother with divertors, but the trade off is that they need to develop a proper direct conversion energy system that is probably on the same level of engineering difficulty. But I think that their main problem will be to develop the 3He generation process (from the D-D ...
by Giorgio
Mon Jan 18, 2021 10:15 am
Forum: News
Topic: Tokamak Energy news
Replies: 125
Views: 146014

Re: Tokamak Energy news

My personal bet is that the first one that will solve "Divertor" and "First wall" engineering issues will be the winner.
by Giorgio
Mon Jan 18, 2021 10:05 am
Forum: News
Topic: Spherical Tokamaks
Replies: 32
Views: 32669

Re: Spherical Tokamaks

Yes, most of the models I saw have the tendency to have too many assumptions (mostly to reduce the computing power needed to run the simulation), but this in the end prevents to have a clear understanding of the equilibrium point of the interactions among the different forces, especially for what it...
by Giorgio
Sun Jan 17, 2021 2:39 pm
Forum: News
Topic: BLP news
Replies: 660
Views: 259482

Re: BLP news

If after all what happened in the last 20 years they are still able to find people willing to invest in their magical technology, than I can only say that those people deserve to part ways with their money...