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Nonlinear interaction of a rippled laser beam with an electrostatic upper hybrid wave in collisional plasma

Published online by Cambridge University Press:  19 June 2007

T.S. Gill
Affiliation:
Department of Physics, Guru Nanak Dev University, Amritsar India
N.S. Saini
Affiliation:
Department of Physics, Guru Nanak Dev University, Amritsar India

Abstract

In this paper, authors have studied the growing interaction of the rippled laser beam with upper hybrid mode leading to enhanced Raman scattering for collisional plasma. The presence of ripple leads to additional coupling between the rippled laser beam and electrostatic upper hybrid mode via modified background density. Computational results show the focusing of the upper hybrid wave for the chosen set of plasma parameters. With coupling being strong, the excited upper hybrid wave further interacts with rippled laser beam and give rise to enhanced Raman scattering. The significant role of collisional parameter S is also highlighted in the present investigation. An expression for the scattered power is derived and the effect of the externally applied static magnetic field on enhancement of scattered power is observed. We conclude from present analysis that the effect of the increased magnetic field is useful in suppressing the growth of the ripple.

Type
Research Article
Copyright
© 2007 Cambridge University Press

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