Self-focusing of Gaussian laser beam in collisionless plasma and its effect on stimulated Brillouin scattering process

2013 ◽  
Vol 290 ◽  
pp. 175-182 ◽  
Author(s):  
Arvinder Singh ◽  
Keshav Walia
Keyword(s):  
Laser Beam ◽  
Brillouin Scattering ◽  
Collisionless Plasma ◽  
Stimulated Brillouin Scattering ◽  
Scattering Process ◽  
Gaussian Laser Beam ◽  
Self Focusing ◽  
Stimulated Brillouin

scholarly journals Suppression of stimulated Brillouin scattering in laser beam hot spots

2009 ◽  
Vol 27 (4) ◽  
pp. 619-627 ◽  
Author(s):  
R.P. Sharma ◽  
Prerana Sharma ◽  
Shivani Rajput ◽  
A.K. Bhardwaj
Keyword(s):  
Laser Beam ◽  
Brillouin Scattering ◽  
Collisionless Plasma ◽  
Stimulated Brillouin Scattering ◽  
Landau Damping ◽  
Beam Radius ◽  
Plasma Parameters ◽  
Power Flux ◽  
Ion Acoustic Wave ◽  
Stimulated Brillouin

AbstractIn this article, filamentation of a high power laser beam in hot collisionless plasma is investigated considering the ponderomotive nonlinearity. We have studied the effect of self focusing (filamentation) of the laser beam on the localization of ion acoustic wave (IAW) and on stimulated Brillouin scattering (SBS) process. The nonlinear coupling between the laser beam and IAW results in the modification of the Eigen frequency of IAW; consequently, enhanced Landau damping of IAW and a modified mismatch factor in SBS process occur. Due to enhanced Landau damping, there is a reduction in the intensity of IAW wave, and the SBS process gets suppressed. For the typical laser plasma parameters: the laser power flux = 1016 W/cm2, laser beam radius (r0) = 12 µm, n/ncr = 0.11, and (Te/Ti) = 10, the SBS reflectivity is found to be suppressed approximately by 10%.

Stimulated Brillouin scattering and ponderomotive self‐focusing from a single laser hot spot

1995 ◽  
Vol 2 (5) ◽  
pp. 1712-1724 ◽  
Author(s):  
V. V. Eliseev ◽  
W. Rozmus ◽  
V. T. Tikhonchuk ◽  
C. E. Capjack
Keyword(s):  
Brillouin Scattering ◽  
Hot Spot ◽  
Stimulated Brillouin Scattering ◽  
Self Focusing ◽  
Single Laser ◽  
Stimulated Brillouin
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