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What is meaning of w in plasma permitivity,exactly?

  1. Apr 30, 2013 #1
    I have a problem.
    as you know,in a plasma medium(such as cylindrical tube),we have:

    εr = 1- [ ωp^2 / ω*(ω - jv) ]

    that : v = collision frequency
    ωp = plasma frequency
    but I don't know meaning of " ω " ,exactly.
    ω is RF feed frequency of plasma or incident wave frequency to plasma?
    I read several book and I know what is plasma,but " ω " parameter confused me...
    is there anyone who direct me?
    best wishes...
  2. jcsd
  3. Apr 30, 2013 #2
    It is the frequency of the electromagnetic field.
    The formula is an expression of the dielectric constant as a function of frequency.
  4. May 1, 2013 #3
    yes,I know that this is EM wave frequency.but which EM wave?
    it is related to incident wave to plasma,or feeding frequency in surface wave plasma?
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