Search found 123 matches

by RERT
Sat Mar 17, 2018 7:25 pm
Forum: News
Topic: Tokamak Energy news
Replies: 110
Views: 121398

Re: Tokamak Energy news

Thanks for that. Apparently this feature is known as plasma 'elongation'. It seems that the question of Tokamak plasma shape has been an active field of research. Who knew... Going back to Wiki on Spherical Tokamaks, I see this in the section on plasma stability : "Using this in the critical beta fo...
by RERT
Wed Mar 14, 2018 10:38 am
Forum: News
Topic: Tokamak Energy news
Replies: 110
Views: 121398

Re: Tokamak Energy news

Tokamak Energy is investigating Spherical Tokamaks. Reading a little yesterday, I couldn't come across a reason why high aspect-ratio tokamaks stopped at spherical. Put a little more formally, one can conceive of an 'ellipsoidal' tokamak where the length of the central column is substantially greate...
by RERT
Tue Jan 16, 2018 4:40 pm
Forum: News
Topic: EMC2 news
Replies: 433
Views: 287989

Re: EMC2 news

I think the LPP offering is for the purchase of non-voting shares, a useful trick I think.
by RERT
Fri Jan 05, 2018 2:00 pm
Forum: News
Topic: Fission news(I know blasphemy )
Replies: 59
Views: 65912

Re: Fission news(I know blasphemy )

Can't argue with that. Subtract volatile renewables from volatile demand, and you get smaller demand which is more volatile. Must be bad for any base load supply which is not easy to adjust. Ironic that renewables are working against carbon-free nuclear power. You can probably work up an argument th...
by RERT
Thu Jan 04, 2018 7:53 am
Forum: News
Topic: Fission news(I know blasphemy )
Replies: 59
Views: 65912

Re: Fission news(I know blasphemy )

I think the assumption that regulation was cleared up-front is questionable. The assertion from Thorcon was that 1970s nuclear costs were lower than coal. That must mean currently many billions of costs per plant are due to regulation, which can hardly be from a careful review of plans. More likely ...
by RERT
Wed Jan 03, 2018 11:15 am
Forum: News
Topic: SpaceX News
Replies: 2288
Views: 649921

Re: SpaceX News

Not enough information. I think it depends on the relative launch costs of an F9 payload with the two platforms. Costs probably just means operating costs, as the capital cost of a launch of each is the same - a fiftieth of the cost of a BFR, if you will never replace the F9. If you always make more...
by RERT
Fri Dec 29, 2017 7:33 pm
Forum: Design
Topic: Radiation Shielding Materials Containing H, B, and N
Replies: 7
Views: 12194

Re: Radiation Shielding Materials Containing H, B, and N

I found this, seems to corroborate the above, around page 65 onwards

http://www.iaea.org/inis/collection/NCL ... 090626.pdf
by RERT
Thu Dec 28, 2017 3:53 pm
Forum: Design
Topic: Radiation Shielding Materials Containing H, B, and N
Replies: 7
Views: 12194

Re: Radiation Shielding Materials Containing H, B, and N

I've been fiddling with data from Wikipedia on p11B fusion, which suggests that the side reaction p+11B->12C+Gamma (16MeV) occurs with a 0.1 % branching probability. Given this, I think a 10MW (Th) reactor would be a source of kilowatts of 16MeV gammas, and I agree with the last post that a foot of ...
by RERT
Fri Dec 15, 2017 1:49 pm
Forum: News
Topic: laser fusion breakthrough
Replies: 3
Views: 5386

Re: laser fusion breakthrough

I asked a physics question at the LPP crowdfunding site stemming from linking to the paper from her. Eric Lerner of LPP said they had been exchanging info with this group. Also interesting to note the basic physics of the Avalanche mechanism talked about in the arxiv paper linked in the root post wo...
by RERT
Sat Dec 02, 2017 4:09 pm
Forum: News
Topic: Lawaranceville E-Newsletter
Replies: 829
Views: 334816

Re: Lawaranceville E-Newsletter

I think the right way to view this offering is as a charitable donation that comes with a lottery ticket. Structurally, you might make 100 times your money with a probability less than 1 in 10000 - my guess. However, I thought it was worth supporting when it was pure charity and more so now. You cer...
by RERT
Mon Oct 23, 2017 7:25 pm
Forum: News
Topic: Applied Fusion Systems to build prototype reactor in 3 years
Replies: 12
Views: 9723

Re: Applied Fusion Systems to build prototype reactor in 3 years

This is a wildly optimistic way to look at it, but you could equally ask why there is more than one company making IC engined cars. One way to answer: because the monopoly profits accruing to a single manufacturer would tempt in many competitors...
by RERT
Fri Aug 11, 2017 9:25 pm
Forum: News
Topic: EM Drive
Replies: 710
Views: 361561

Re: EM Drive

I agree Shawyers theory appears to be rubbish. My opinion on the accounts is that Shawyer has spent many years and many hundreds of thousands of pounds testing his concept. He should know if it works or not. He is either right, criminal, or delusional. The remark about the B37b was meant to be mildl...
by RERT
Fri Aug 11, 2017 7:59 am
Forum: News
Topic: EM Drive
Replies: 710
Views: 361561

Re: EM Drive

Except that Shawyer has (probably) sunk his own money into his company, along with that of other people willing to give him indefinite term, interest free loans - close friends. He has been paying back for a couple of years, as disclosed in related party transactions. Read the last 10 years accounts...
by RERT
Fri May 05, 2017 10:33 pm
Forum: News
Topic: More Helion Energy news....
Replies: 223
Views: 168625

Re: More Helion Energy news....

Hi Maui! Yes, you'd think the US could manage the equivalent of a cup of coffee each per YEAR on fusion research. Put like that, I think my Saturday is going to end with a stiff drink....
by RERT
Fri May 05, 2017 8:03 am
Forum: News
Topic: More Helion Energy news....
Replies: 223
Views: 168625

Re: More Helion Energy news....

The $5 bn figure seems to be politicians peddling a view by picking at the tax treatment of oil and gas and calling various things subsidies and tax breaks. In these days of partisan non-facts, it has no credibility. Every company has allowable costs for tax purposes. The belief that this amounts to...