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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
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: [email protected]

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.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2015 

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