Laser beam filamentation and filamentation instability in ultrarelativistic laser-plasma interaction: influence of relativistic effect and plasma nonuniformity

2019 ◽  
Author(s):  
Xia Xiongping ◽  
ZHANG Geng
Keyword(s):  
Laser Beam ◽  
Laser Plasma ◽  
Relativistic Effect ◽  
Plasma Interaction ◽  
Laser Plasma Interaction ◽  
Filamentation Instability ◽  
Plasma Nonuniformity

scholarly journals Charged particle source produced by laser–plasma interaction in the relativistic regime

2002 ◽  
Vol 20 (2) ◽  
pp. 217-221 ◽  
Author(s):  
V. MALKA
Keyword(s):  
Charged Particle ◽  
Laser Beam ◽  
Laser Plasma ◽  
Charged Particles ◽  
Intense Laser ◽  
Plasma Interaction ◽  
Particle Source ◽  
Laser Plasma Interaction ◽  
Intense Laser Beam ◽  
Relativistic Regime

Plasmas irradiated by an intense laser beam have recently been demonstrated to be sources for particles (electrons, ions, positrons). During this interaction, it has been found that these charged particles can be efficiently accelerated. An overview of these results as well as some perspectives are presented here.

scholarly journals Nonlinear evolution of the filamentation instability and chaos in laser–plasma interaction

2016 ◽  
Vol 35 (1) ◽  
pp. 10-18 ◽  
Author(s):  
S. Sharma ◽  
N. Kumar ◽  
S. Hussain ◽  
R.P. Sharma
Keyword(s):  
Laser Plasma ◽  
Nonlinear Evolution ◽  
Chaotic Behavior ◽  
Nonlinear Phenomena ◽  
Plasma Interaction ◽  
Laser Plasma Interaction ◽  
Localized Structures ◽  
Filamentation Instability ◽  
Perturbation Parameters ◽  
Analytical Tools

AbstractFilamentation is one of the most common nonlinear phenomena taking place in the laser–plasma interaction that splits the laser beam into high-intensity spikes. The present study deals with the nonlinear evolution of filamentation instability in laser–plasma interaction and the development of chaos in contrast to linear growth as reported by Kaw et al. in 1973. We have considered a non-uniform perturbation superimposed on plane-wave pump such that due to non-uniformity of the perturbation a finite intensity gradient arises and gives rise to ponderomotive force. This causes filamentation of wave, which has been studied presently using numerical methods as well as analytical tools. The results reveal that the intensity of perturbation gets localized and delocalized with the distance of propagation. The numerical simulation results also reveal that the intensity of perturbation route from ordered to chaotic behavior depending upon the pump laser and perturbation parameters. To study the chaotic behavior, Lyapunov exponents has also been calculated. The semi-analytical method is also developed to have an insight into some of the features of simulation like the formation of localized structures.

scholarly journals Suppression of stochastic pulsation in laser–plasma interaction by smoothing methods

1993 ◽  
Vol 11 (1) ◽  
pp. 177-184 ◽  
Author(s):  
M. Aydin ◽  
H. Hora
Keyword(s):  
Laser Plasma ◽  
Fusion Energy ◽  
Laser Interaction ◽  
Direct Drive ◽  
Question Mark ◽  
Plasma Interaction ◽  
Laser Plasma Interaction ◽  
Smoothing Methods ◽  
Plasma Corona ◽  
Interaction Problem

Smoothing of laser-plasma interaction by ISI, RPP, SSD, etc. was mainly directed to overcome lateral nonuniformity of irradiation. While these problems are in no way less important, we derived numerically the model of the Laue rippling and hydrorelaxation model for explanation of the measured temporal pulsation in the 10- to 40-ps range and how the smoothing schemes suppress these pulsations. The partial standing wave fields of the normally coherent laser-irradiated plasma corona is then suppressed by smoothing and conclusion for tests for this model, e.g., by the “question mark experiment” is given. The result provides a physics solution of the laser interaction problem for direct-drive inertial fusion energy

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