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Magnetic guide field generation in thin collisionless current sheets

Baumjohann, W., R. Nakamura, and R. A. Treumann (2010), Magnetic guide field generation in thin collisionless current sheets, Annales Geophysicae, 28, 789-793, Refereed and substantially re-written Journal version with alphabetically listed authors.

Abstract
In thin ($\Delta<$ few $\lambda_i$) collisionless current sheets in a space plasma like the magnetospheric tail or magnetopause current layer, magnetic fields can grow {from thermal fluctuation level by the action of the non-magnetic Weibel instability \citep{weibel1959}. }The instability is driven by the counter-streaming electron inflow from the `ion diffusion' (ion inertial Hall) region into the inner current (electron inertial) region after thermalisation by the two-stream instability. Under magnetospheric tail conditions it takes $\sim$ 50 e-folding times ($\sim$ 100 s) for the Weibel field to reach observable amplitudes $|{\bf b}_{\,\rm W}|\sim 1$ nT. In counter-streaming inflows these fields are of guide field type.
Further information
BibTeX
@article{id1539,
  author = {W. Baumjohann and R. Nakamura and R. A. Treumann},
  journal = {Annales Geophysicae},
  month = {mar},
  note = {Refereed and substantially re-written Journal version with alphabetically listed authors},
  pages = {789-793},
  title = {{Magnetic guide field generation in thin collisionless current sheets}},
  volume = {28},
  year = {2010},
  url = {www.ann-geophys.net/28/789/2010},
}
EndNote
%0 Journal Article
%A Baumjohann, W.
%A Nakamura, R.
%A Treumann, R. A.
%D 2010
%V 28
%J Annales Geophysicae
%P 789-793
%Z Refereed and substantially re-written Journal version with alphabetically listed authors
%T Magnetic guide field generation in thin collisionless current sheets
%U www.ann-geophys.net/28/789/2010
%8 mar
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Printed 12. Dec 2019 07:18