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Relativistic Gaussian laser beam self-focusing in collisional quantum plasmas

Published online by Cambridge University Press:  04 May 2015

S. Zare ,
S. Rezaee ,
E. Yazdani ,
A. Anvari  and
R. Sadighi-Bonabi
S. Zare
Affiliation:
Department of Physics, Sharif University of Technology, Tehran, Iran
S. Rezaee
Affiliation:
Department of Physics, Sharif University of Technology, Tehran, Iran
E. Yazdani
Affiliation:
Department of Energy Engineering and Physics, Amirkabir University of Technology, Tehran, Iran
A. Anvari
Affiliation:
Department of Physics, Sharif University of Technology, Tehran, Iran
R. Sadighi-Bonabi*
Affiliation:
Department of Physics, Sharif University of Technology, Tehran, Iran
*
Address correspondence and reprint requests to: R. Sadighi-Bonabi, Department of Physics, Sharif University of Technology, P.O. Box 11365-9567, Tehran, Iran. E-mail: sadighi@sharif.ir
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Abstract

Propagation of Gaussian X-ray laser beam is presented in collisional quantum plasma and the beam width oscillation is studied along the propagation direction. It is noticed that due to energy absorption in collisional plasma, the laser energy drops to an amount less than the critical value of the self-focusing effect and consequently, the laser beam defocuses. It is found that the oscillation amplitude of the laser spot size enhances while passing through collisional plasma. For the greater values of collision frequency, the beam width oscillates with higher amplitude and defocuses in a shallower plasma depth. Also, it is realized that in a dense plasma environment, the laser self-focusing occurs earlier with the higher oscillation amplitude, smaller laser spot size and more oscillations.

Keywords

Beam width parameterDielectric constantQuantum plasmaSelf-focusingX-ray laser
Type
Research Article
Information
Laser and Particle Beams , Volume 33 , Issue 3 , September 2015 , pp. 397 - 403
Copyright
Copyright © Cambridge University Press 2015 

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