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Double Beltrami states and loss of equilibrium in electron, positron and ion plasmas

Published online by Cambridge University Press:  20 June 2019

S. M. Gondal Open the ORCID record for S. M. Gondal [Opens in a new window] ,
M. Iqbal ,
Shafa Ullah ,
M. Asghar  and
Ashfaq H. Khosa
S. M. Gondal*
Affiliation:
Department of Physics, University of Engineering and Technology, Lahore 54890, Pakistan
M. Iqbal
Affiliation:
Department of Physics, University of Engineering and Technology, Lahore 54890, Pakistan
Shafa Ullah
Affiliation:
Department of Physics, University of Engineering and Technology, Lahore 54890, Pakistan
M. Asghar
Affiliation:
Department of Physics, Khawaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
Ashfaq H. Khosa
Affiliation:
COMSATS Institute of Information Technology, Islamabad, Pakistan
*
†Email address for correspondence: sabagondal@gmail.com
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Abstract

It is shown that an electron, positron and ion plasma can be self-organized to a double Beltrami state – the superposition of two force-free states. The scale parameters which determine the nature of the self-organized structures are found to depend on the number densities of the plasma species. The loss of equilibrium in slowly evolving double Beltrmi states is investigated. The effects of density ratios, helicities, positron flows and energy on equilibrium are investigated. It is found that the double Beltrami state transforms to a single Beltrami state at the termination of equilibrium. It is also shown that much of the magnetic energy converts to the flow kinetic energy through catastrophic transformation.

Keywords

astrophysical plasmasspace plasma physics
Type
Research Article
Information
Journal of Plasma Physics , Volume 85 , Issue 3 , June 2019 , 905850306
Copyright
© Cambridge University Press 2019 

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