Debye length: Difference between revisions

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Due to the fact that a plasma consists of freely moving charged particles, it has a natural tendency to shield net charges (or DC electric fields).
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.
The effective shielding length is the Debye length, and can be derived from a simple two fluid model of the plasma.
<ref>J.P. Freidberg, ''Plasma physics and fusion energy'', Cambridge University Press (2007) ISBN 0521851076</ref>
<ref>J.P. Freidberg, ''Plasma physics and fusion energy'', Cambridge University Press (2007) ISBN 0521851076</ref>

Revision as of 07:34, 26 July 2010

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]

λD=(ε0Tee2n0)1/2

where Te is given in energy units.

References

  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