Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-24T19:30:51.204Z Has data issue: false hasContentIssue false
  • English
  • Français

Enhanced Raman scattering of a rippled laser beam in a magnetized collisional plasma

Published online by Cambridge University Press:  01 March 2004

NARESHPAL SINGH SAINI  and
TARSEM SINGH GILL
NARESHPAL SINGH SAINI
Affiliation:
Department of Physics, Guru Nanak Dev University, Amritsar, India
TARSEM SINGH GILL
Affiliation:
Department of Physics, Guru Nanak Dev University, Amritsar, India
Get access Rights & Permissions [Opens in a new window]

Abstract

In the laser–plasma interaction experiments, self-focusing and filamentation affect quite a large number of other parametric processes including stimulated scattering processes. Nonlinearity considered in the present problem is the collisional type. The coupling between the main beam, ripple, and excited electron plasma wave is strong. Authors have investigated the growing interaction of a rippled laser beam with an electron plasma wave leading to enhanced Raman scattering. An expression for scattered power is derived and the effect of the externally applied magnetic field on the enhancement of scattered power is observed. From computational results, it is observed that the effect of increased intensity of the main beam leads to suppression of power associated with the Raman scattered wave.

Keywords

Collisional plasmaCouplingRaman scatteringRippled laser beam
Type
International Conference on the Frontiers of Plasma Physics and Technology
Information
Laser and Particle Beams , Volume 22 , Issue 1 , March 2004 , pp. 35 - 40
Copyright
2004 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Akhmanov, S.A., Sukhorbikov, A.P. & Khokhlov, R.V. (1968). Sov. Phys. Usp. 10, 609.CrossRef
Amin, M.R., Capjack, C.E., Frycz, P., Rozmus, W. & Tikhonchuk, V.T. (1993). Two-dimensional studies of stimulated Brillouin scattering, filamentation, and self-focusing instabilities of laser light in plasmas. Phys. Fluids 5, 3748–3764.CrossRefGoogle Scholar
Fuchs, J., Labaune, C., Depierreux, S., Tikhonchuk, V.T. & Baldis, H.A. (2000). Stimulated Brillouin and Raman scattering from a randomized laser beam in large inhomogeneous collisional plasmas. I. Experiment Phys. Plasmas 7, 4659–4668.CrossRefGoogle Scholar
Liu, C.S. & Tripathi, V.K. (1995). Thermal effects on coupled self-focusing and Raman scattering of a laser in a self-consistent plasma channel. Phys. Plasmas 2, 3111–3114.CrossRefGoogle Scholar
Russell, D.A., DuBois, D.F. & Rose, H.A. (1999). Nonlinear saturation of stimulated Raman scattering in laser hot spots. Phys. Plasmas 6, 1294–1317.CrossRefGoogle Scholar
Saini, N.S. & Gill, T.S. (2002). Advances in contemporary physics & energy (supplement)New Delhi, India: Allied Publishers Pvt. Ltd., 111–127.
Short, R. W. & Simon, A. (1998). Collisionless damping of localized plasma waves in laser-produced plasmas and application to stimulated Raman scattering in filaments. Phys. Plasmas 5, 4134–4143.CrossRefGoogle Scholar
Singh, A. & Singh, T. (1990). The effect of a static magnetic field on the growth of a rippled electromagnetic beam. J. Plasma Phys. 43, 465–474.CrossRefGoogle Scholar
Singh, N. & Singh, T. (1999). Growth of laser ripple in a collisional magnetoplasma and its effect on plasma wave excitation. J. Plasma Fusion Res. 2, 423–426Google Scholar
Singh, T. (1981). Excitation of waves and scattering phenomena in Plasmas, PhD Thesis, Indian Institute of Technology Delhi: New Delhi, India.
Singh, T. & Salimullah, M. (1987). Nonlinear Interaction of a Gaussian EM Beam with an Electrostatic Upper Hybrid Wave: Stimulated Raman Scattering. IL Nuovo Cimento 9, 987–998.CrossRefGoogle Scholar
Sodha, M.S., Ghatak, A.K. & Tripathi, V.K. (1976). Progress in Optics 13, 169.
Sodha, M.S., Singh, T., Singh, D.P. & Sharma, R.P. (1981). Growth of laser ripple in a plasma and its effect on plasma wave excitation. Phys. Fluids 24, 914–919.CrossRefGoogle Scholar
Sodha, M.S., Tewari, D.P. & Subbarao, D. (1983). Contemporary Plasma Physics. Delhi, India: Macmillan India Ltd.