Search found 2908 matches

by Giorgio
Sun Sep 19, 2021 6:26 am
Forum: News
Topic: General Fusion in the news
Replies: 544
Views: 267910

Re: General Fusion in the news

I agree indeed that having a proof of principle of the compression chamber is essential, but i doubt that the data they will collect from reaching the 10% of Lawson criteria will be enough to build a mathematical model to validate the path to commercial fusion. Maybe it will validate their actual ma...
by Giorgio
Thu Sep 16, 2021 6:30 am
Forum: News
Topic: General Fusion in the news
Replies: 544
Views: 267910

Re: General Fusion in the news

GF's investors are timid. They will front only the money needed to demonstrate what they need and no more. Their next machine will be the commercial machine. I am also very puzzled by their target goal.... Reaching a 10% of Lawson criteria is something that reactors like Alcator-A/C and JT-60 did i...
by Giorgio
Thu Sep 16, 2021 6:19 am
Forum: News
Topic: Z-Pinch Renaissance
Replies: 207
Views: 148502

Re: Z-Pinch Renaissance

Skipjack wrote:
Wed Sep 15, 2021 12:30 pm
Plus, break even with such a tiny device would be very different from JT-60.
Not only more tiny, but also orders of magnitude less complex than JT-60.
If they really get to break even it will be indeed a game changer in the industry.
by Giorgio
Mon Sep 13, 2021 8:11 am
Forum: News
Topic: "Former fusion scientist on why we won't have fusion power by 2040"
Replies: 5
Views: 249

Re: "Former fusion scientist on why we won't have fusion power by 2040"

True, though the cryo system will consume some energy too (not sure how much). I am not sure that that was included in the 30 watts. I believe that the 30W refer to the power consumed by the cryo system to keep the HTSC at superconducting temperature during the working operation. For sure it does n...
by Giorgio
Mon Sep 13, 2021 7:53 am
Forum: News
Topic: More Helion Energy news....
Replies: 344
Views: 220162

Re: More Helion Energy news....

Check out their patent that I linked. They can have a Li blanket to produce more T. They talk about it in the patent. They don't have to store the T for decades. They can just trade it for He3. https://www.defensenews.com/opinion/commentary/2017/03/06/commentary-the-looming-crisis-for-us-tritium-pr...
by Giorgio
Sun Sep 12, 2021 9:56 am
Forum: News
Topic: More Helion Energy news....
Replies: 344
Views: 220162

Re: More Helion Energy news....

Anyway, from what I understand, they will have several operation modes for the generator. One that promotes He3/T production and one that produces more power through D-He3 reactions. They will likely run the former more in the beginning to build a He3/T inventory and then switch to the latter. Here...
by Giorgio
Sun Sep 12, 2021 9:41 am
Forum: News
Topic: "Former fusion scientist on why we won't have fusion power by 2040"
Replies: 5
Views: 249

Re: "Former fusion scientist on why we won't have fusion power by 2040"

Skipjack wrote:
Sun Sep 12, 2021 1:37 am
Plus, he is focused on Toks without HTSCs and so on and so forth.
Makes me wonder what type of scientist he was if he thinks that HTSC are not an essential step to obtain a viable fusion machine.....
by Giorgio
Wed Sep 08, 2021 12:19 am
Forum: General
Topic: We lost so many members :(
Replies: 29
Views: 1271

Re: We lost so many members :(

ladajo wrote:
Fri Sep 03, 2021 7:04 pm
Well, I am not dead yet. :)
Glad to see that you are still around! :mrgreen:
by Giorgio
Sun Aug 22, 2021 11:49 am
Forum: News
Topic: More Helion Energy news....
Replies: 344
Views: 220162

Re: More Helion Energy news....

But darn, just throw us nerds a bone every now and then, will you?! ;) The only regret I have for not having chosen a researcher career is that I do not have a nice institutional email that I could use to tease companies like Helion to release some data to a fellow researcher! :mrgreen: :mrgreen: :...
by Giorgio
Sun Aug 22, 2021 9:37 am
Forum: News
Topic: More Helion Energy news....
Replies: 344
Views: 220162

Re: More Helion Energy news....

Their website says that they have achieved 10 Tesla magnetic fields. VENTI, according to JASON only had 8. Gain scales a B^2.4. So that should mean 1.7 times the density. Trenta has 3 times the radius of VENTI and about 30 times the volume. Now for FRCs confinement times scales with radius^2.6. Pow...
by Giorgio
Sun Aug 22, 2021 9:04 am
Forum: News
Topic: World-first "impossible" rotating detonation engine fires up
Replies: 3
Views: 5833

Re: World-first "impossible" rotating detonation engine fires up

Very nice, I totally missed this.
There is not much data in the article but it says that results will be published soon.
I am curious to see if the ISP will match their predicted model of around 150.
by Giorgio
Sun Aug 22, 2021 8:32 am
Forum: Theory
Topic: Stellarators with Permanent Magnets
Replies: 12
Views: 298

Re: Stellarators with Permanent Magnets

I believe that the fine tuning of the electromagnets is necessary because the W7X is not a perfectly aligned design yet. In other words W7X is a test bed where they are trying to figure out the perfect Stellarator shape. Once they have figured that out, permanent magnets might work. That said, I am...
by Giorgio
Wed Aug 18, 2021 9:07 pm
Forum: Theory
Topic: Stellarators with Permanent Magnets
Replies: 12
Views: 298

Re: Stellarators with Permanent Magnets

Nanos wrote:
Wed Aug 18, 2021 11:51 am
You can get electric motors that don't use permanent magnets can't you ?
You can, but the extra complications and costs is simply not worth the hassle.
Economic is more important than engineering in this case.
by Giorgio
Wed Aug 18, 2021 5:57 am
Forum: Theory
Topic: Stellarators with Permanent Magnets
Replies: 12
Views: 298

Re: Stellarators with Permanent Magnets

Would this suggest that using permanent magnets in an electric motor design is not the way forward ? You are comparing incomparable technological designs. Electric motor use permanent magnets as a mean to transform an electrical current into a circular motion, a completely different field from thei...
by Giorgio
Tue Aug 17, 2021 7:42 pm
Forum: Theory
Topic: Stellarators with Permanent Magnets
Replies: 12
Views: 298

Re: Stellarators with Permanent Magnets

I suppose you could have a third approach and have mechanically adjustable permanent magnets, but I guess their response times would be too slow ? Correct. Firstly permanent magnets are not permanent as their flux energy will decrease over time and their strength will be influenced by different ope...