The fusion tag has no wiki summary.
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What is the lowest possible theoretical temperature that nuclear fusion can occur at?
I am not talking about the pseudo-science of so called cold fusion I am interested in what temperature you can get away with to produce fusion reaction. I was thinking in terms of micro-fusion or at ...
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What is the difference between the KDEMO and DEMO projects?
I'm writing a paper on the future of fusion technology and I can't seem to find the difference between Europe's DEMO experiment and Korea's KDEMO except for the fact that they are both planned to ...
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5answers
468 views
Why doesn't fusion contradict the 1st law of thermodynamics?
I was reading up on the 1st law of thermodynamics for my Chemistry exam and I was wondering why doesn't fusion contradict the 1st law of thermodynamics?
The 1st law states that
The energy of an ...
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Calculating the minimum Lawson parameter for sustained d-d fusion
Calculate the minimum Lawson parameter for sustained deuterium-deuterium fusion in a plasma with an energy of 10 keV.
I have been given the above question as part of a homework assignment and help ...
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4answers
232 views
Where does the energy produced by fusion come from?
Fission, in layman's (or "initiate's") terms, is easy enough to understand; a large atom with a lot of protons and neutrons requires a large amount of force provided by the strong interaction to ...
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Neutron generators as Fusion reactor
One way of generating neutrons is by fusing D-D or D with T. In neutron generators that work by acceleration D-ions into a solid matrix of e.g. metal and T or D (metal hydrides). Such generators can ...
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What do we do with the byproducts of Nuclear Fusion? [closed]
http://wiki.answers.com/Q/What_are_the_byproducts_of_nuclear_fusion
So I quickly googled the byproducts of fusion and got the above link.
It looks to me that you'll be left with He atoms. So what ...
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1answer
131 views
Is man-made Carbon Fusion possible?
In a type Ia Supernova, the carbon accumulated in the earlier stages of a stars death fissues to create even heavier elements. Could this be used by humans aswell? Is it theoretically possible to ...
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Nuclear fusion: what causes this “resonance” peak?
Can anyone explain why the $^{11}\mathrm{B}\mathrm{H}$ fusion cross-section has a peak near 150 keV, and why $\mathrm{D}\mathrm{D}$ and $\mathrm{D}\mathrm{T}$ have no such sharp peaks?
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Can we use a warp bubble for nuclear fusion?
I understand NASA is now experimenting with a tweaked Alcubierre drive.
Apperantly some physicists predict crazy heat (hotter than the sun) inside the warp bubble caused by Hawking radiation (recent ...
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1answer
104 views
Is there a good summary of all nuclear fusion approaches?
I am pretty sure, that during last 60 years of well-funded research a lot of ideas on nuclear fusion were already tried and ruled out.
Is there some summary describing all of them and why they ...
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190 views
Could we use particle colliders as fusion generators?
So I know the basic gist is that fusion power's main issue is sustaining the fusion. I also know that there are two methods. The Torus method and the laser method. The torus magnetically contains ...
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How fission and fusion create energy? [duplicate]
Possible Duplicate:
How to explain $E=mc^2$ mass defect in fission/fusion
In order for energy to be released, mass has to be "lost", because mass is a form of energy.
In my science class, ...
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4answers
1k views
What are the challenges to achieving cold fusion?
I am an absolute neophyte regarding physics. What are the challenges to achieving cold fusion?
I'm not sure this is a duplicate of Why is cold fusion considered bogus?, because that question is ...
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1answer
184 views
Complete list of nuclear fusion reactions
Could anyone suggest good source of all fusion reactions and their cross section vs energy graphs, including ones which were ruled out for nuclear fusion reactors (i.e. including endothermic and ...
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1answer
87 views
Could tidal effects make matter hot enough for nuclear fusion?
There was a recent question about cosmological firewalls. Putting aside questions of entanglement and information and looking at the problem from a pure mechanical viewpoint, we know that although ...
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3answers
342 views
Nuclear fusion : ion vs atom fusion cross section?
I've read critique on ITER project (in Russian), and one of points was that cross section of ion-ion fusion is much lower than ion-atom and atom-atom, and that's the reason why it likely to not work.
...
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1answer
247 views
“Dynamic Albedo of Neutrons” and all these Farnsworth fusors
I've checked specs of Russian "Dynamic Albedo of Neutrons" module on Mars MSL rover - it can do 10^8 neutron pulses at 10 pulses per second. It works on D-T reaction in tiny linear accelerator, and ...
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400 views
Can fusion and fission happen at the same time, in the same place?
Can fusion and fission happen at the same time, in the same place? I was talking with a friend, and he thinks that fission and fusion happen at the same time at the sun, is that true? I guess this ...
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Is there a sound theoretical argument against inner-shell induced nuclear chain reactions?
There is a claim often made about cold fusion, that it is excluded theoretically. The main theoretical argument is that electronic energies are too low to overcome the Coulomb barrier, since d-d ...
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1answer
954 views
How to explain $E=mc^2$ mass defect in fission/fusion
What is the nature of nuclear energy? This is closely related to the correct explanation of mass defect.
I did some research of that topic and cannot come to a single comprehensive and consistent ...
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Helium Fusion and the Origin of Elements
In the fifth of his Messenger Lectures Feynman mentions the fact that Carbon-12 has an energy level at 7.82 MeV. He then states that this is what enables the fusion of three Helium-4 ions into Carbon ...
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How large can you make a tokamak?
I've seen questions on how small you can make a tokamak. But I haven't yet seen any "physical" upper limit on the tokamak design.
If you take a wind turbine for example, doubling the linear ...
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1answer
102 views
How is/do they plan on having fusion energy collected at the National Ignition Facility?
I was just watching a program on television showing how the method they use at the National Ignition Facility to attempt to achieve fusion is to fire extremely powerful lasers at a small pellet of ...
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1answer
130 views
Why does a coulomb explosion induce fusion?
If you strip the valence electrons apart with a very short intense electromagnetic field the remaining core explodes in a so called coulomb explosion.
But experiments have shown that under certain ...
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3answers
605 views
How much of the energy from 1 megaton H Bomb explosion could we capture to do useful work?
The world is full of nuclear warheads being stockpiled. Controlled fusion power seems a long way away. Could we put these warheads to better use by exploding them in a controlled way and capturing ...
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4answers
319 views
Should we forget fusion and focus on geothermal power? [closed]
Firstly I can say that I would love us to come up with a sustainable fusion solution. However with the latest estimates being 2050 at the earliest for an effective fusion solution and the planets ...
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2answers
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Proposed Closing of Alcator C-Mod Fusion Tokamak
So I have friends at school who are petitioning against the proposed closing of the tokamak (refer to the recently released FY 2013 Administration Budget). I told said friends that before I signed the ...
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1answer
184 views
role of pure mathematics in fusion?
Is there any way a pure math guy can get his rigorous math fix while simultaneously moving fusion research forward? Is fusion simply too complicated to take a pure math approach? What open math ...
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1answer
184 views
How to initiate fusion explosion without a fission trigger
I'd like to know what theoretical methods for initiating a fusion detonation without a fission trigger exist, and which would be the most practical in the near future. I'd also like to know how small ...
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485 views
Why doesn't helium start to fuse while there is still hydrogen fuel?
In all the descriptions of the stellar life cycle it seems as though helium doesn't start being fused until all (most?) of the hydrogen is gone.
Is this true? Why is this?
It seems counter ...
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2answers
146 views
Proof Human Designs for Fusion Could Work
Are there convincing proofs on paper that fusion is possible the various ways humans are trying to design machines to do it or is the only way absolutely proven to work in theory also the only way ...
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721 views
The amount of energy required to break the Coulomb Barrier
This web page says that only 3-10 keV of energy is required to break the Coulomb barrier for colliding hydrogen nuclei.
Pretty far from what originally said.
Is this true? Does this have something ...
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2answers
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Is the E-cat for real?
Does this thing really do what they say?
http://www.youtube.com/watch?v=EhvD4KuAEmo
If it does, it looks like this will probably be the biggest breaktrough in science ever :)
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Is the quantum magnetic field effect real?
Does this http://www.lawrencevilleplasmaphysics.com/index.php?option=com_content&view=article&id=63&Itemid=81 make sense to you guys? Is there any reason it wouldn't work. It seems like ...
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1answer
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Does magnetic geometry determine the scaling of a Polywell fusor?
Does magnetic geometry determine the scaling of a Polywell fusor?
Forgive imprecise terminology here - by "magnetic geometry" I mean the configuration of the magnets, the configuration that creates ...
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1answer
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How does the internuclear repulsion vary in Hydrogenic atom collision?
Hydrogen fusion requires two hydrogen nuclei to get close enough (typically a few fm) to fuse. Much of the problem of creating a fusion reactor is overcoming the Coulomb repulsion between a pair of ...
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Recent news about Tokamak
I first heard about the Tokamak in highschool 10 years ago and was wondering how far the technology has come since then. Can it sustain a reaction for more than a few seconds? Are these devices ...
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What elements can be created in the fusion process of different types of suns?
As I understand it fusion inside a sun can produce heavier and heavier elements until some sort of "nucleus size limit" is reached. As far as I understand, the limit is thought to be reached with the ...
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Hydrogen as a fuel in Sun
The source of Sun's incessant energy is hydrogen; which is continuously converting to helium through nuclear fusion reaction releasing energy. Why does not all hydrogen convert into helium in one big ...
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Lightning and nuclear fusion
I'm going to be brief, I just saw a Discovery Channel show that showed a lot of interesting phenomena around lightning (like elves, how cool is that(!)), and got me wondering.
1) Thinking of ...
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4answers
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cosmic radiation muons as a source for muon-catalyzed fusion
taking rough numbers from here and here, it seems that with natural cosmic radiation sources, we could sustain $10^6$ muon-catalyzed fusion reactions per square-meter per minute. This would be $14 ...
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How often does nuclear fusion occur within the human body?
I'm just curious. I figure atoms fuse occasionally just by chance, like quantum tunneling or rogue waves. Is this true? If so, any idea how often?
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1answer
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Do Hydrinos Exist? [duplicate]
Possible Duplicate:
Have the Rowan University “hydrino” findings been replicated elsewhere?
I came across this controversial company: Black Light Power
I want to know if there ...
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6answers
575 views
Is there any inherent danger in operating a Thermonuclear Reactor?
Nuclear fusion research appears to promise sustainable, practically unlimited energy, and according to ITER it will be a perfectly safe, non-polluting source of energy.
My question is if there are ...
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2answers
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Light bending surfaces and energy funneling properties
In the last year there has been fuzz regarding metamaterials studied for the purpose of cloaking, and it seem to me they are somewhat glorified 2D waveguides, but in any case it seems a reasonable ...
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2answers
660 views
Origin of elements heavier than Iron (Fe)
In all the discussions about how the heavy elements in the universe are forged in the guts of stars and especially during a stars death, I usually hear that once the star begins fusing lighter atoms ...
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1answer
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How much energy can be extracted from hydrogen?
http://en.wikipedia.org/wiki/B-L says that the difference between baryon number and lepton number is conserved. Ordinary hydrogen has one of each, but turning it into helium releases only the binding ...
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Help fill in my understanding of the Polywell fusion reactor
Polywell is a proposed new type of fusion reactor, which is designed to use magnetic fields to overcome the problems with the Elmore-Tuck-Watson fusor. I'm trying to understand exactly how it works.
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What new breakthrough energy technologies are close to being realized? [closed]
Energy production is one of the burning issues for humankind. There has been some talk about future energy technologies including Fusion, Anti-matter annihilation and Zero-point-energy (from most to ...
