Growth of a Gaussian Laser Ripple on a Gaussian Beam in a Collisionless Magnetoplasma and its Effect on the Excitation of Ion-Acoustic Wave

1991 ◽  
Vol 31 (5) ◽  
pp. 499-512 ◽  
Author(s):  
A. Singh ◽  
T. Singh
Keyword(s):  
Acoustic Wave ◽  
Gaussian Beam ◽  
Ion Acoustic Wave ◽  
Ion Acoustic

scholarly journals Excitation of nonlinear ion acoustic wave and stimulated Brillouin scattering of hollow Gaussian beam in relativistic plasma

2017 ◽  
Vol 35 (2) ◽  
pp. 226-233 ◽  
Author(s):  
P. Sharma
Keyword(s):  
Differential Equation ◽  
Acoustic Wave ◽  
Gaussian Beam ◽  
Brillouin Scattering ◽  
Collisionless Plasma ◽  
Stimulated Brillouin Scattering ◽  
Beam Width ◽  
Ion Acoustic Wave ◽  
Ion Acoustic ◽  
Stimulated Brillouin

AbstractIn the present work, excitation of nonlinear ion acoustic wave (IAW) in collisionless plasma by laser beam having null intensity at the center is examined considering relativistic nonlinearity. The differential equation for beam-width parameter is determined considering relativistic nonlinearity using the paraxial and Wentzel–Kramers–Brillouin approximations by the parabolic equation method. The propagation features of the IAW are found to be modified due to the nonlinearity present in the system. The hollow Gaussian beam (HGB) gets nonlinearly coupled with the seed IAW, results in excitation of nonlinear IAW. The interaction of nonlinear IAW with pump beam demonstrated stimulated Brillouin scattering (SBS) of HGB. It is found that the power of IAW and power of SBS is affected with the order of HGB. The power of IAW and backscattered power of SBS is determined analytically and numerically for various orders of HGB. It is found that the power of IAW and the backscattering is diminished for higher order of HGB.

scholarly journals Stimulated Brillouin backscattering of filamented hollow Gaussian beams

2013 ◽  
Vol 31 (4) ◽  
pp. 689-696 ◽  
Author(s):  
R.P. Sharma ◽  
Ram Kishor Singh
Keyword(s):  
Acoustic Wave ◽  
Gaussian Beam ◽  
Brillouin Scattering ◽  
Collisionless Plasma ◽  
Stimulated Brillouin Scattering ◽  
Ion Acoustic Wave ◽  
Ion Acoustic ◽  
Paraxial Ray ◽  
Stimulated Brillouin ◽  
Plasma Coupling

AbstractThis paper presents an investigation for excitation of ion acoustic wave and resulting stimulated Brillouin scattering in a collisionless plasma due to presence of a laser beam carrying null intensity at center (hollow Gaussian beam). In presence of ponderomotive nonlinearity, the pump beam get focused and affects the back stimulated Brillouin scattering process. To understand the nature of laser plasma coupling, a paraxial-ray approximation has been invoked for the propagation of the hollow Gaussian beam, ion acoustic wave, and stimulated Brillouin scattering. It is observed from the result that self-focusing and back reflectivity reduces for higher order of hollow Gaussian beam.

Studies of ion-acoustic wave properties by pulsed CO2 laser scattering

1979 ◽  
Vol 22 (1) ◽  
pp. 110 ◽  
Author(s):  
R. L. Watterson ◽  
A. L. Peratt ◽  
H. Derfler
Keyword(s):  
Acoustic Wave ◽  
Co2 Laser ◽  
Laser Scattering ◽  
Ion Acoustic Wave ◽  
Ion Acoustic ◽  
Pulsed Co2 Laser ◽  
Wave Properties

Propagation of ion-acoustic wave in the presheath region of a plasma sheath system

2005 ◽  
Vol 73 (1) ◽  
pp. 87-97 ◽  
Author(s):  
U Deka ◽  
C B Dwivedi ◽  
H Ramachandran
Keyword(s):  
Acoustic Wave ◽  
Plasma Sheath ◽  
Ion Acoustic Wave ◽  
Ion Acoustic

scholarly journals Propagation of ion acoustic wave energy in the plume of a high-current LaB6 hollow cathode

2017 ◽  
Vol 96 (2) ◽  
Author(s):  
Benjamin A. Jorns ◽  
Christoper Dodson ◽  
Dan M. Goebel ◽  
Richard Wirz
Keyword(s):  
Acoustic Wave ◽  
Wave Energy ◽  
Hollow Cathode ◽  
High Current ◽  
Ion Acoustic Wave ◽  
Ion Acoustic
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