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Talk-Polywell.org • General Fusion in the news - Page 27
Page 27 of 32

Re: General Fusion in the news

Posted: Tue Jun 20, 2017 7:30 pm
by mvanwink5
SJ,
You may be right, but TA is talking like PB11 is their commercial target instead of an interim, which was a bit of a surprise to me. Only one way to find out for sure...

Re: General Fusion in the news

Posted: Mon Jun 26, 2017 2:28 pm
by crowberry

Re: General Fusion in the news

Posted: Mon Jun 26, 2017 10:35 pm
by Skipjack

Re: General Fusion in the news

Posted: Tue Jun 27, 2017 12:09 am
by mvanwink5
No, it is the difference between private and government. GF is doing only what is needed to prove their design in integrated form.

Unlike TriAlpha, GF has significant issues to solve in the prototype, such as:

-plasma contamination during compression (lead mist from the collapsing shock wave, they plan to use a lithium coating via lithium injection),

-adiabatic compression (current compression by explosive collapse using explosive charges is being used to verify), magnetics remain stable, no contamination by fusion killing contaminates,

-going to a full size plasma injector (they are at 500ev and need to go to 10kev, if I am understanding the status correctly),

-and the technical challenge of doing it all together (sending a jet of lithium into the spinning cavity in the 3 meter spinning lead sphere, coating the inside of the cavity, followed by the perfect shaped shock wave compression, resulting in adiabatic compression of plasma without lead mist contamination - quite a feat).

Separate pieces tested separately, and computer simulation is not the same as working all together physically.

Re: General Fusion in the news

Posted: Tue Jun 27, 2017 3:40 pm
by crowberry

Re: General Fusion in the news

Posted: Tue Jun 27, 2017 3:46 pm
by crowberry

Re: General Fusion in the news

Posted: Tue Jun 27, 2017 4:04 pm
by mvanwink5
I have been unclear what the 500 ev has referred to. I thought it referred to temperature reached under stable plasma conditions using both their injector plus explosive compression using shaped charges (issue being stable plasma and contaminants - lithium liner used to suppress contaminants).

Re: General Fusion in the news

Posted: Wed Jul 05, 2017 3:01 pm
by crowberry
Yes, I guess you are right in that the 500 eV is for the combination of injection and compression. But it is still for the small injector so the results for the corresponding big injector will be interesting to see.

Here is an article An interview with Bruce Colwill, Chief Financial Officer at General Fusion written by Brittany Lane. It is very general and non-technical but explains in simple terms what GF is trying to do .

Re: General Fusion in the news

Posted: Thu Jul 06, 2017 12:24 am
by Skipjack
500 eV is not that much if it is plasma temperature. But once you manage to get over 1 keV, you know pretty certain that you have a valid system.

Re: General Fusion in the news

Posted: Thu Jul 06, 2017 1:18 am
by mvanwink5
SJ
Adiabatic compression is GF's target, and they are searching for a plasma structure that will provide that. That is the point, not the temperature. Once GF has determined the structure compression will be scaled up, hence the larger injector was made and is being tested. GF is the only ones that know the current status of those large injector tests. So, 500 ev is old news and led to the scaled up test injector for which we have no news of. We can surmise that it is going well based on their movement to the $$$ integrated system.

You see what effort they are making to find the right plasma structure, it is not automatic that you crash two spheromaks together and get the required fusion conditions. But I don't see Helion doing that, which is as you point out possibly just being secretive. Still it means that claims are unverified. In contrast, TriAlpha and GF are putting into articles and conferences their efforts and insights that bolster their claims. Yet, TriAlpha and GF aren't publishing for altruistic science reasons, they both want big investors for near term big money backing.

I dunno about Helion. I don't see what I would want to see for me to have confidence, but then again, I don't have big money to throw at them. :lol:

Re: General Fusion in the news

Posted: Thu Jul 06, 2017 4:57 pm
by Skipjack

Re: General Fusion in the news

Posted: Mon Aug 21, 2017 2:10 am
by Skipjack
General Fusion posted their latest research papers:
http://generalfusion.com/research-library/

Re: General Fusion in the news

Posted: Fri Aug 25, 2017 9:32 am
by crowberry

Re: General Fusion in the news

Posted: Mon Sep 11, 2017 4:36 pm
by mvanwink5
GF EPR 2017 presentation on plasma formation and compression:
http://generalfusion.com/wp-content/upl ... iments.pdf

Re: General Fusion in the news

Posted: Tue Sep 26, 2017 3:52 pm
by mvanwink5