Onset of stimulated Raman scattering of a laser in a plasma in the presence of hot drifting electrons

Stimulated Raman scattering of a laser in plasmas with energetic drifting electrons was investigated by analyzing the growth of interacting waves during the Raman scattering process. The Langmuir wave and scattered electromagnetic sideband wave grow initially and are dampened after attaining a maxim...

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Bibliographic Details
Published in:Physics of plasmas 2015-05, Vol.22 (5), p.52101
Main Authors: Gupta, D. N., Yadav, Pinki, Jang, D. G., Hur, M. S., Suk, H., Avinash, K.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Computer simulation
Drift
ELECTRON DRIFT
Electrons
INSTABILITY
INTERACTIONS
LANGMUIR FREQUENCY
Langmuir waves
LASER-PRODUCED PLASMA
Lasers
Particle in cell technique
Plasma physics
PLASMA WAVES
Plasmas (physics)
RAMAN EFFECT
Raman spectra
Stability
TAIL ELECTRONS
Two dimensional models
TWO-DIMENSIONAL CALCULATIONS
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Summary:Stimulated Raman scattering of a laser in plasmas with energetic drifting electrons was investigated by analyzing the growth of interacting waves during the Raman scattering process. The Langmuir wave and scattered electromagnetic sideband wave grow initially and are dampened after attaining a maximum level that indicates a periodic exchange of energy between the pump wave and the daughter waves. The presence of energetic drifting electrons in the laser-produced plasma influences the stimulated Raman scattering process. The plasma wave generated by Raman scattering may be influenced by the energetic electrons, which enhance the growth rate of the instability. Our results show that the presence of energetic (hot) drifting electrons in a plasma has an important effect on the evolution of the interacting waves. This phenomenon is modeled via two-dimensional particle-in-cell simulations of the propagation and interaction of the laser under Raman instability.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4919626