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Microwave energy storage

  1. Jul 15, 2010 #1
    I know there exist methods to store a microwave in a vacuum superconducting or dielectric chamber.From first sight it looks as promising energy storage device,more safe then a flywheel.Even if chamber will be broken microwave will just left and fly into space.
    Unfortunately,I was not able to find any mentions on maximal amount
    of energy that could be stored in this way.Maybe somebody could help
    with approximate calculations?Or some clue on how could it be calculated?
     
    Last edited: Jul 15, 2010
  2. jcsd
  3. Jul 15, 2010 #2
    This isn't practical but works in principle.

    When the peak electric field intensity in the vacuum is greater than than twice the rest mass of the electron, you could end up creating particle pairs.

    The safety is not so clear and has to do with how quickly energy is released. Suppose your microwave box had 10^15 Joules in it. What would happen if you hit it with a hammer? Hint: a U235 fission nuke might release 1/10th as much when it goes off.
     
  4. Jul 15, 2010 #3
    I think one of the problems could be that there is no pure vacuum and
    even rare atoms will start to make some interruptions.I'm not going
    to create new particles,but rather something similar or bit surpassing hydrocarbon fuels in energy density.Why do you think it is not practical?Maybe more practical than hydrogen storage researches?
    Do you think we could create some similar resonances in intramolecular space?There is nothing between large molecules,it could be regarded as absolute "vacuum".
     
    Last edited: Jul 16, 2010
  5. Jul 18, 2010 #4
    "When the peak electric field intensity in the vacuum is greater than than twice the rest mass of the electron, you could end up creating particle pairs."

    Do you mean hypothetical Hawking radiation?
    Somebody still needs to prove experimetally it does exist.
     
  6. Jul 20, 2010 #5
    Not hypothetical Hawking radiation. This is the very real production of (non-virtual) electron-positron pairs. You may need a nucleus (or stray proton maybe) but it will happen if the fields get high enough.
     
  7. Jul 20, 2010 #6

    Dale

    Staff: Mentor

  8. Aug 28, 2011 #7
    Will dielectric breakdown of vaccuum prevent energy storage
    at some point of electric field strenghts?Or there is no such issue?

    Could you calculate approximately how much it will limit energy density?
     
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