Search found 2830 matches

by Giorgio
Wed Mar 31, 2021 6:31 pm
Forum: News
Topic: More Helion Energy news....
Replies: 243
Views: 201789

Re: More Helion Energy news....

They are present also in the google version.
If for any reason you can't see them on the webpage click on "Download PDF" and you will get a complete PDF of the patent as it was originally submitted to the patent office.
by Giorgio
Wed Mar 31, 2021 7:21 am
Forum: News
Topic: More Helion Energy news....
Replies: 243
Views: 201789

Re: More Helion Energy news....

Skipjack wrote:
Tue Mar 30, 2021 4:54 pm
Yeah, but the google version is missing the charts.
What charts are missing?
by Giorgio
Tue Mar 30, 2021 11:24 am
Forum: News
Topic: More Helion Energy news....
Replies: 243
Views: 201789

Re: More Helion Energy news....

I found a version of their second patent that has the drawings and tables included (yay!). That one is a lot more clear on the various fuel ratios, etc and what can be achieved with them: https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2015163970&tab=PCTDESCRIPTION This patent should be t...
by Giorgio
Mon Mar 29, 2021 11:04 am
Forum: News
Topic: More Helion Energy news....
Replies: 243
Views: 201789

Re: More Helion Energy news....

You just have to trust me on that being for the D+T reactor ;) That said, it would make sense to have a lithium blanket to breed extra Tritium from the D+D neutrons. That would allow them to add more He3 to the fuel mix (once it has decayed to He3), increasing the ratio of He3 to D and that in turn...
by Giorgio
Mon Mar 29, 2021 10:56 am
Forum: News
Topic: Lawaranceville E-Newsletter
Replies: 846
Views: 385576

Re: Lawaranceville E-Newsletter

I think the most likely undesirable side reaction will be D+T and I don't think chances of that are that high. I did some more digging and it looks like my above estimate of (max) 5% was pretty good: The levitating D- Pole experiment assumed a probability for D+T side reactions in a He3 catalyzed D...
by Giorgio
Mon Mar 29, 2021 10:25 am
Forum: News
Topic: More Helion Energy news....
Replies: 243
Views: 201789

Re: More Helion Energy news....

They published several papers as this one: https://arpa-e.energy.gov/sites/default/files/ALPHA_SLOUGH.pdf Yeah, I remember that paper (and several others). That was most certainly the D+T design, not the D+He3 design. It even says Tritium breeding in the graphic to the right (3rd paragraph) on the ...
by Giorgio
Mon Mar 29, 2021 10:13 am
Forum: News
Topic: Lawaranceville E-Newsletter
Replies: 846
Views: 385576

Re: Lawaranceville E-Newsletter

I think you misunderstood me. The goal is to fuse D+D and make He3 and T. The T and He3 get separated and the He3 is fed back into the system for the next pulse. There won't be any T left in the reactor to fuse with a D in the next shot. That is at least what I understand to be the goal. Yes, I als...
by Giorgio
Mon Mar 29, 2021 9:39 am
Forum: News
Topic: More Helion Energy news....
Replies: 243
Views: 201789

Re: More Helion Energy news....

Which ARPA-E papers are those? IIRC, Helion was "selling" a D+T version to ARPA-E since that was considered the more "conservative" choice. So maybe the difference regarding the divertor is from that? Could be, but the ARPA-E papers numbers ares more coherent for a D-D route. They published several...
by Giorgio
Mon Mar 29, 2021 7:46 am
Forum: News
Topic: More Helion Energy news....
Replies: 243
Views: 201789

Re: More Helion Energy news....

The divertor is not used for energy recovery in Helion's design it has an entirely different purpose. According the arpa-e papers I saw from them, diverters was playing an important role in the energy recovery balance, harvesting about 50% of the "net" energy of each single pulse. If they changed t...
by Giorgio
Mon Mar 29, 2021 7:35 am
Forum: News
Topic: Lawaranceville E-Newsletter
Replies: 846
Views: 385576

Re: Lawaranceville E-Newsletter

Pulses reactors have an advantage there because they can remove the products between shots. The time is probably too short for any significant amount of the products to fuse in side reactions. Also, you can sort of control the environment to further reduce the likelihood of this happening. I think,...
by Giorgio
Sun Mar 28, 2021 11:06 pm
Forum: News
Topic: Lawaranceville E-Newsletter
Replies: 846
Views: 385576

Re: Lawaranceville E-Newsletter

Helion is going to use a D+D -> He3 + D cycle. The T from the second D+D branch will eventually decay into more He3 too. I have never been really convinced on this fuel cycle idea, that's why I said that they need to crack the technological barrier to fusion. In D-D there is 50% of the fusion produ...
by Giorgio
Sun Mar 28, 2021 9:52 pm
Forum: News
Topic: More Helion Energy news....
Replies: 243
Views: 201789

Re: More Helion Energy news....

Indeed if the thermal load is greatly inferior to its melting point, than molybdenum has the inherent advantages over tungsten that it does not form aggressive impurities as you said. But considering that the diverters will work also as FRC Energy recovery, partial magnetic energy recovery and direc...
by Giorgio
Fri Mar 26, 2021 8:03 pm
Forum: News
Topic: General Fusion in the news
Replies: 487
Views: 249155

Re: General Fusion in the news

Very interesting, they are going to give a spherical shape to the shock wave by delaying the hit time of the pistons. This will also reduce mechanical stress load on the structure.
It looks like a smart idea, at least in theory.
by Giorgio
Fri Mar 26, 2021 7:57 pm
Forum: News
Topic: Lawaranceville E-Newsletter
Replies: 846
Views: 385576

Re: Lawaranceville E-Newsletter

There is no shortage of He3 for experimental purposes at the moment, but there is nowhere enough material to fuel even a demo reactor, so any commercial fusion route out there will need to crack the technological barrier to economically fuse p-B11 or D-T mixtures if we want to see a working technolo...
by Giorgio
Thu Mar 25, 2021 9:39 am
Forum: News
Topic: Another huge crack in the Standard Model
Replies: 1
Views: 680

Another huge crack in the Standard Model

Another nail in the coffin of the Standard Model and the need of invoking "dark entities" to sustain its validity. Results are now at 3.1 Sigma of precision, still far from the 5 Sigma needed to validate a new scientific discovery, but we are at level where there is only 0.1% of possibility that the...