Debye length

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A plasma consisting of freely moving positively and negatively charged particles has a natural tendency to shield net charges (or cancel DC electric fields). The effective shielding length is the Debye length, and can be derived from a simple two fluid model of the plasma. [1] [2]

$ \lambda_D = \left ( \frac{\varepsilon_0 T_e}{e^2 n_0}\right )^{1/2} $

where Te is given in energy units.

See also


  1. J.P. Freidberg, Plasma physics and fusion energy, Cambridge University Press (2007) ISBN 0521851076
  2. K. Miyamoto, Plasma Physics and Controlled Nuclear Fusion, Springer-Verlag (2005) ISBN 3540242171