Electrostatic and thermal fluctuations are the source of magnetic fields in unmagnetized inhomogeneous plasmas

Details Electrostatic and thermal fluctuations are the source of magnetic fields in unmagnetized inhomogeneous plasmas Electrostatic and thermal fluctuations are the source of magnetic fields in unmagnetized inhomogeneous plasmas

2009-06-09

arxiv.org/abs/0906.1669v1

Physics

Plasma Physics

17 pages, no figures, submitted to Physics of Plasmas in June 2009

Scientific paper

It is pointed out that electron thermal fluctuations can couple with the ion acoustic mode in an inhomogeneous plasma to generate a low frequency ion time scale electromagnetic wave. This electromagnetic wave can become unstable if the temperature and density gradients are parallel to each other which can be the case in laser-plasmas similar to stellar cores. The comparisons of the present theoretical model with the previous investigations are also presented. The final result is applied to a classical laser induced plasma for illustration.

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