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Nonlinear saturation of the Weibel instability in a dense Fermi plasma

Published online by Cambridge University Press:  01 April 2009

F. HAAS ,
P. K. SHUKLA  and
B. ELIASSON
F. HAAS
Affiliation:
Institut für Theoretische Physik IV, Ruhr–Universität Bochum, D-44780 Bochum, Germany (bengt@tp4.ruhr-uni-bochum.de) Universidade do Vale do Rio dos Sinos - UNISINOS, Av. Unisinos 950, 93022–000, São Leopoldo, RS, Brazil
P. K. SHUKLA
Affiliation:
Institut für Theoretische Physik IV, Ruhr–Universität Bochum, D-44780 Bochum, Germany (bengt@tp4.ruhr-uni-bochum.de)
B. ELIASSON
Affiliation:
Institut für Theoretische Physik IV, Ruhr–Universität Bochum, D-44780 Bochum, Germany (bengt@tp4.ruhr-uni-bochum.de) Department of Physics, Umeå University, SE-901 87 Umeå, Sweden
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Abstract

We present an investigation for the generation of intense magnetic fields in dense plasmas with an anisotropic electron Fermi–Dirac distribution. For this purpose, we use a new linear dispersion relation for transverse waves in the Wigner–Maxwell dense quantum plasma system. Numerical analysis of the dispersion relation reveals the scaling of the growth rate as a function of the Fermi energy and the temperature anisotropy. The nonlinear saturation level of the magnetic fields is found through fully kinetic simulations, which indicates that the final amplitudes of the magnetic fields are proportional to the linear growth rate of the instability. The present results are important for understanding the origin of intense magnetic fields in dense Fermionic plasmas, such as those in the next-generation intense laser–solid density plasma experiments.

Type
Papers
Information
Journal of Plasma Physics , Volume 75 , Issue 2 , April 2009 , pp. 251 - 258
Copyright
Copyright © Cambridge University Press 2008

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