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Re: Nuclear Fusion closer to becoming a reality?

Posted: February 12 14, 3:28 pm
by go birds
gdi where tf is jim

Re: Nuclear Fusion closer to becoming a reality?

Posted: February 12 14, 3:31 pm
by Felix The Cat
IMADreamer wrote:It all seems to good to be true. Some big corporation will come in and [expletive] it all up before we ever get to the point of "free energy" or whatever the pipe dream is. Back when they were building nuclear reactors it was said they would make energy so cheap it would be free. ha.
Wouldn't the big corporations _want_ this kind of breakthrough so they can make more profits off "cheaper" energy? It's not like fusion is going to allow some upstart company to compete with the big boys.

Re: Nuclear Fusion closer to becoming a reality?

Posted: February 12 14, 3:34 pm
by Donnie Ebert
If this means Jim has made it to the globally-warmed future, maybe he has left cryptic instructions on who wins the Series this year.

Re: Nuclear Fusion closer to becoming a reality?

Posted: February 12 14, 3:56 pm
by heyzeus
We could also use Swirls here. He's a nuclear thingamajigger.

Re: Nuclear Fusion closer to becoming a reality?

Posted: February 12 14, 4:10 pm
by Freed Roger
Image

what the [expletive] is that? shore is Purty.

Re: Nuclear Fusion closer to becoming a reality?

Posted: February 12 14, 4:12 pm
by Schlich
heyzeus wrote:
go birds wrote:
Scientists in California saednesday night that they have for the first time managed to release more energy from their nuclear fusion experiment than they put into it, which marks a critical threshold in eventually achieving the goal of a self-sustaining nuclear-fusion reaction.
http://www.independent.co.uk/news/scien ... 24237.html
Doesn't that violate some law of thermodynamics?

I don't know [expletive] about [expletive]. We need Jim up in here. JIIIIIIIIIIIIIIIIIIIIIIM. Answer this.
From what I understand, it doesn't violate laws of thermodynamics because the extra energy that is released comes from the internal energy of the molecules. Basically more energy is stored in two hydrogen molecules than in one helium molecule. If this energy released is greater than the energy it took to fuse the molecules, we have an efficient fusion reaction.

Re: Nuclear Fusion closer to becoming a reality?

Posted: February 12 14, 4:19 pm
by AWvsCBsteeeerike3
iirc, it all has to do with entropy of the system. Maybe. Energy can change forms (ie, become heat) but entropy has to balance out or something like that.

Re: Nuclear Fusion closer to becoming a reality?

Posted: February 12 14, 10:07 pm
by slide_into_first
Conventional deuteron fusion is a two-step process, in which an unstable high energy intermediary is formed:
D + D → 4He * + 24 MeV
Experiments have observed only three decay pathways for this excited-state nucleus, with the branching ratio showing the probability that any given intermediate follows a particular pathway. The products formed via these decay pathways are:
4He* → n + 3He + 3.3 MeV (ratio=50%)
4He* → p + 3H + 4.0 MeV (ratio=50%)
4He* → 4He + γ + 24 MeV (ratio=10−6)

Re: Nuclear Fusion closer to becoming a reality?

Posted: February 14 14, 11:58 am
by Fat_Bulldog
slide_into_first wrote:Conventional deuteron fusion is a two-step process, in which an unstable high energy intermediary is formed:
D + D → 4He * + 24 MeV
Experiments have observed only three decay pathways for this excited-state nucleus, with the branching ratio showing the probability that any given intermediate follows a particular pathway. The products formed via these decay pathways are:
4He* → n + 3He + 3.3 MeV (ratio=50%)
4He* → p + 3H + 4.0 MeV (ratio=50%)
4He* → 4He + γ + 24 MeV (ratio=10−6)
Beat me to it.

Re: Nuclear Fusion closer to becoming a reality?

Posted: February 14 14, 1:12 pm
by jim
heyzeus wrote:
go birds wrote:
Scientists in California said on Wednesday night that they have for the first time managed to release more energy from their nuclear fusion experiment than they put into it, which marks a critical threshold in eventually achieving the goal of a self-sustaining nuclear-fusion reaction.
http://www.independent.co.uk/news/scien ... 24237.html
Doesn't that violate some law of thermodynamics?

I don't know [expletive] about [expletive]. We need Jim up in here. JIIIIIIIIIIIIIIIIIIIIIIM. Answer this.
What are you asking? About fusion violating some law of physics? Matter is converted to energy during the process of fusion, so it doesn't violate anything. They keep saying they are close, and it seems promising, but I'll kind of believe it when I see it. The process seems like it should be simpler than it is.