Search found 150 matches

by RERT
Thu Sep 23, 2021 9:01 am
Forum: News
Topic: "Former fusion scientist on why we won't have fusion power by 2040"
Replies: 6
Views: 382

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

I made myself watch this a few days ago. Ego and pessimism aside, the schematic on the need for Q>20 for a Tokamak was interesting. That was from generation efficiency 50% (not unkind) and power conversion to plasma injected power 10% (no idea if that makes sense). So Q=20 just drives the machine wi...
by RERT
Sun Sep 12, 2021 8:28 am
Forum: News
Topic: More Helion Energy news....
Replies: 344
Views: 220606

Re: More Helion Energy news....

Thanks!
by RERT
Sat Sep 11, 2021 10:24 pm
Forum: News
Topic: More Helion Energy news....
Replies: 344
Views: 220606

Re: More Helion Energy news....

Let’s do this in detail. The Helion reactor runs on D+3He. Is that 50:50 or some other ratio? D+3He produces 4He. D + D produces 3He and 3H in similar quantities. The cross-section of DD is much lower than D3He, and us intrinsically less common as both species are the same. It seems quite improbable...
by RERT
Sat Sep 11, 2021 3:52 pm
Forum: News
Topic: More Helion Energy news....
Replies: 344
Views: 220606

Re: More Helion Energy news....

Thanks Skipjack, that was very informative.

The pB11 advantage would be fuel availability and price. I don’t know how quickly you can ramp up a fleet of D3He reactors, but with p11B there are no real issues with fuel.
by RERT
Fri Sep 10, 2021 10:17 am
Forum: News
Topic: More Helion Energy news....
Replies: 344
Views: 220606

Re: More Helion Energy news....

The energy needed to run the cryo plant would eat it all up. That's very plausible but not completely obvious. Even 1% better on a 100Mw plant could justify a lot of refrigeration, couldn't it? Guess it depends how close to a heat source the coils have to be, etc. But really I was getting at the po...
by RERT
Thu Sep 09, 2021 10:07 am
Forum: News
Topic: More Helion Energy news....
Replies: 344
Views: 220606

Re: More Helion Energy news....

The ‘just plain copper’ remark above was interesting. What might be possible with HTSC? What fraction of the 5% unrecovered power might be saved?
by RERT
Sun Jul 25, 2021 4:40 pm
Forum: News
Topic: Fusion devices are not "nuclear fusion reactors"
Replies: 13
Views: 702

Re: Fusion devices are not "nuclear fusion reactors"

Depressing but consistent: everything else is weaponized, why not Greenpeace.

Can you cite any examples on the 'who-not-what' idea?
by RERT
Sun Jul 25, 2021 4:34 pm
Forum: News
Topic: Tokamak Energy news
Replies: 143
Views: 156604

Re: Tokamak Energy news

I found this:

https://energyskeptic.com/2021/why-toka ... -work-out/

Not strictly relevant to TE, but much more interesting than the lightweight hit-piece I was expecting. I'd be interested in folks' thoughts...
by RERT
Sun Jul 25, 2021 12:41 pm
Forum: News
Topic: Fusion devices are not "nuclear fusion reactors"
Replies: 13
Views: 702

Re: Fusion devices are not "nuclear fusion reactors"

Try ‘Confessions of a Greenpeace Dropout’. Not a great work of unbiassed literature, but an interesting peek at the start of Greenpeace from an insider, and how it got nuts. Also the quote from Paul Erlich of Stanford: “Giving society cheap, abundant energy would be the equivalent of giving an idiot...
by RERT
Mon Jul 19, 2021 9:40 pm
Forum: News
Topic: Lawaranceville E-Newsletter
Replies: 854
Views: 410369

Re: Lawaranceville E-Newsletter

I don’t think they ‘make’ the QME. It is just what happens when the fields get high enough and the gyroradius reaches quantum scales. What is critical is that the fields get high enough as the plasmoid implodes. Which on reflection may have been what you meant...
by RERT
Thu Jul 01, 2021 9:51 am
Forum: News
Topic: More Helion Energy news....
Replies: 344
Views: 220606

Re: More Helion Energy news....

Out of nothing really: I hear tell that TAE sees its FRC plasma stability rise with temperature, therefore p11B isn’t as daft as it might seem. That sounds like physics not technology. Isn’t Helion also an FRC? Does similar hope for p11B apply to them? Neutronic power will be considered evil as soon...
by RERT
Fri Jun 25, 2021 7:23 am
Forum: News
Topic: What constitutes a Demonstration Power Plant?
Replies: 18
Views: 1142

Re: What constitutes a Demonstration Power Plant?

Err... a successful demonstration plant demonstrates that a commercial plant is economically viable. Notice that an unsuccessful demo plant can be anything at all. So, all construction and operation details not already well known are characterised well enough to persuade investors to build a commerc...
by RERT
Mon Jun 21, 2021 1:47 pm
Forum: News
Topic: Z-Pinch Renaissance
Replies: 208
Views: 148930

Re: Z-Pinch Renaissance

Because the plasma pinch stability due to flow shear increases with pinch length. Thanks Giorgio. The above is very counter-intuitive! I had already found and skimmed the paper you cite, but couldn't see any reference to pinch length. Have you got a reference for the above? Also surely creating the...
by RERT
Mon Jun 21, 2021 8:20 am
Forum: News
Topic: Z-Pinch Renaissance
Replies: 208
Views: 148930

Re: Z-Pinch Renaissance

Thanks. I need to look at where they calculate the 11th power scaling. On the face of it anything which raises current would be a win, but I’d need to try and understand what the scaling law really means.