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Unformatted text preview: energy in acoustic waves W a and plasma waves W plasma in the limit k/k De 1 with T e T i , e.g. , W = < L 3 X  E kw  2 8 > (2) where the sum over is around the acoustic resonance and similarly for the plasma waves. Which of the two waves produces the dominant contribution to the total energy W tot = T e / 2? Hint: expand the dielectric function kw around the resonance frequency for each of the waves. Dont forget that the resonant frequencies have positive and negative values for a given value of k . 3. Consider a cylindrical system with a uniform magnetic eld B = B z and a radial electric eld E = E r . Transform to a rotating frame to eliminate the electric eld (assume E/B 1) and calculate the resultant centrifugal drift. Is this drift largest for ions or electrons?...
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 Fall '08
 drake
 Energy, Momentum, Work

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