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Magnetic field suppression in collision-less shocks generated during the expansion of a dense plasma into a rarefied medium

Published online by Cambridge University Press:  13 February 2013

G. Sarri ,
M.E. Dieckmann ,
I. Kourakis  and
M. Borghesi
G. Sarri
Affiliation:
School of Mathematics and Physics, The Queen’s University of Belfast, Belfast BT7 1NN, UK
M.E. Dieckmann
Affiliation:
School of Mathematics and Physics, The Queen’s University of Belfast, Belfast BT7 1NN, UK
I. Kourakis
Affiliation:
School of Mathematics and Physics, The Queen’s University of Belfast, Belfast BT7 1NN, UK
M. Borghesi
Affiliation:
School of Mathematics and Physics, The Queen’s University of Belfast, Belfast BT7 1NN, UK

Abstract

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A two-dimensional numerical study of the expansion of a dense plasma through a more rarefied one is reported. The electrostatic ion-acoustic shock, which is generated during the expansion, accelerates the electrons of the rarefied plasma inducing a superthermal population which reduces electron thermal anisotropy. The Weibel instability is therefore not triggered and no self-generated magnetic fields are observed, in contrast with published theoretical results dealing with plasma expansion into vacuum.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 58: ECLA - European Conference on Laboratory Astrophysics , 2012 , pp. 33 - 36
Copyright
© The Author(s) 2013

References

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