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Thread: Nuclear Fusion Compression

  1. #1 Nuclear Fusion Compression 
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    I was wondering if compression is why E/e is potential or is compression process? I do not understand the idea as well as I might like to think. Any input would be well appreciated. Thanks, Peace!


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  3. #2  
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    Let me try to re state my question so it will hopefully make more sense. If I take two stones and some how manage to compress them together such that the Energy required was less than the amount release: so the question is can or does compression mean the process or the potential? I hope that makes more sense. Thanks and Peace!


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    can you also put source, so at least i can read reference ^^

    this topic to much for me >_<,
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  5. #4  
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    I have trouble making sense of what it is that you are saying. What do you mean by ' compressing stones' ?
    In the information age ignorance is a choice.
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    By compressing stones I meant, but wasn't very clear, and could have been better stated "combining" as taking two pieces of clay and pressing them together to form a single piece of clay. This is a very oversimplified example and likely wrong, but in nuclear fission atoms are split so fusion would perhaps mean combining or compressing. I apologize if I am grossly wrong and invite criticism. As far as a reference wikipedia.org/wiki/Inertial_confinement_fusion that page IS NOT LINKED! I had originally typed in nuclear compression. Thanks and Peace!
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  7. #6  
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    From " INERTIAL CONFINEMENT FUSION" - Denis Keefe

    Ann. Rev. Nucl. Part. Sci. 1982. 32:391-441

    Finally, inertial confinement refers to the situation where a
    small volume of thermonuclear fuel - a sphere or pellet of frozen D- T
    mixture, for instance - is rapidly heated and promptly begins to fly
    apart on a very short time scale, T, corresponding to the ratio of the
    pellet radius divided by the thermal speed of the ions (2kT/M)1/2.
    While strictly this represents an unconfined system, there is a small but
    nonzero time in which the plasma density remains adequately large. For
    a pellet size suitable for electricity generation, this time is about 50 ps
    and one must arrange conditions to achieve enough nuclear interactions
    in that time to produce useful amounts of energy. The "confinement"
    time can be increased somewhat by inclusion of tampers of higher*
    density material to lengthen the time of disassembly.
    Like its gravitational counterpart, inertial confinement fusion is
    known to work - in the form of the hydrogen bomb - again on an
    unacceptable scale. A major thrust of inertial confinement fusion
    research, therefore, is to show that very small amounts of D-T can be
    used successfully. For reference, the complete burning of one milligram
    of D-T will produce about 350 MJ; thus a reactor scenario based on
    inertial fusion might call for 10 microexplosions, each burning 1 mg of
    D-T, to take place in a reactor vessel every second. If the output energy
    of the reactions (3.5 GJ per second) is absorbed in a thermal blanket,
    then - all owing for the inefficiency of converting the heat to electric*
    ity - one arrives at an electrical power output of =1 GWe. Also for
    reference, 1 MJ is roughly the energy released when half a pound of
    TNT explodes.

    Also, google Scholar is your friend.
    In the information age ignorance is a choice.
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  8. #7  
    Brassica oleracea Strange's Avatar
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    Quote Originally Posted by ampwitch View Post
    As far as a reference wikipedia.org/wiki/Inertial_confinement_fusion that page IS NOT LINKED!
    You mean this page: Inertial confinement fusion - Wikipedia, the free encyclopedia
    ei incumbit probatio qui dicit, non qui negat
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    You mean this page: Inertial confinement fusion - Wikipedia, the free encyclopedia[/QUOTE]

    Yes, I am terrible at knowing how to link pages...obvious! Thanks, Peace!
    Also thanks to Kerling for the article piece. I really appreciate it.
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  10. #9  
    Geo
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    Temperatures in the core of the Sun are 1x10K to the six. That's fusion. Then there's pressure.

    Fission simply requires a blast to combine two substances which create Einstein's critical mass which has been around since 1942.
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  11. #10  
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    Quote Originally Posted by Geo View Post
    Temperatures in the core of the Sun are 1x10K to the six. That's fusion. Then there's pressure.

    Fission simply requires a blast to combine two substances which create Einstein's critical mass which has been around since 1942.
    Well it is not that simple. First of all Fission is process which occurs natural. Stimulated Fission is very difficult and not within our effective technological reach. We can only smartly combine densities and neutron capture. We can therefore only control the rate of decay. It is certainly not as simple as 'just blasting two densities'.

    Also temperature alone is not a sure way to do fusion. Fusion requires nuclei to combine. Now this might seem simple. As from a certain distance you could argue that nuclear force is to be overcome. But that isn't the problem at all. The problem is that nuclei are charged, and 2 positive charges have a massive force in pushing eachother away. It requires a high pressure (occurence) and a high temperature (effectivity) to produce such reactions. There is a good reason why we need tritium and deuterium to do fusion on earth. And not just hydrogen. Ideally there would be a method to overcome the coulomb barrier due to charge. That would then be a 'cold fusion'.
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    Hmmm - of course it is entirely Science Fiction.

    However - from the Works of Larry Niven - there is a thing called a Bussard Ramjet.

    This uses a tube of incredibly powerful magnetic forces to compress the "solar wind" to a point, from a massive "intake field". Here, the Pressure itself produces incredible temperature - similar to the Gravity which causes Hydrogen to be compressed inside a new forming Star, until it achieves Nuclear Fusion.

    The Bussard Ramajet has an incredibly wide "intake field" and a tiny "pinch zone". The resultatn Blast of Helium Plasma poduces eough thrust to propel a Spaceship, with no necessity to carry Fuel. If the "intake field" is big enough, it can use Interstellar Hydrogen to propel it between Star Systems - but well below Light speed, of course.
    I believe that once it is ignited - the Star-like centre of the "pinch xone" could generate enough energy to power the Electromagnetic Fields, and the very low temperature of Interstellar Space would allow greater efficiency, by using Superconductors to generate this Field.
    The only problem would be getting enough Power to start the Process.

    YEH - All Sci Fi - but it seems to make sense.

    At much higher Pressures / Temperatures - the "pinch zone" could use Helium to create Oxygen or Nitrogen, with a Carbon Catalyst. This all seems to make sense, from the Science Articles I have read.

    References to "burning" other Istotopes or Radicals in a Bussard Ramjet occur in the Novellette Protector by Larry Niven.
    If I wasn't so stupid - I might know what I was doing
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  13. #12  
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    Karakaris. Sure that would be could be done. But not practically first of all, for it to work, we'd need to stay close to the sun. Second the moving charges make an electric field of themselves. And the magnetic laws in plasma are not so straight forward. It wouldn't make a good shipdrive. But you could make some sort of funnel perhaps. Still you wouldn't be able to fuse the plasma. As the change in conductivity behaviour would require you to make a system so massive the propulsion wouldn't be enough to get it anywhere.
    In the information age ignorance is a choice.
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