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Plasma expansion dynamics in the presence of a relativistic electron beam

Published online by Cambridge University Press:  19 March 2015

El-Amine Benkhelifa  and
Mourad Djebli
El-Amine Benkhelifa
Affiliation:
Faculty of Physics, Theoretical Physics Laboratory, Algiers, Algeria
Mourad Djebli*
Affiliation:
Faculty of Physics, Theoretical Physics Laboratory, Algiers, Algeria
*
Address correspondence and reprint requests to: Mourad Djebli, Faculty of Physics, Theoretical Physics Laboratory, USTHB, B.P. 32 Bab-Ezzouar, 16079 Algiers, Algeria. E-mail: mdjebli@usthb.dz
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Abstract

The dynamics of an electron–ion plasma is studied when a mono-energetic relativistic electron beam penetrates the expanding plasma. Combined effects of thermal pressure and ambipolar electrostatic potential are considered for fully relativistic multi-fluids model where the quasi-neutrality assumption is used for a beam–plasma system. Relativistic effects are considered for both density and velocity of the beam fluid. Ion acceleration is depicted through a spike-like structure resulting from non-local charge separation and associated with the beak-down of quasi-neutrality. The beam initial speed is found to enhance the spike amplitude and change its position. Moreover, relativistic effects are particularly found significant for a non-thermal plasma.

Keywords

Electron beamRelativistic effectsExpansionQuasi-neutrality
Type
Research Article
Information
Laser and Particle Beams , Volume 33 , Issue 2 , June 2015 , pp. 273 - 277
Copyright
Copyright © Cambridge University Press 2015 

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