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Energy exchange during stimulated Raman scattering of a relativistic laser in a plasma

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3 Author(s)
Gupta, D.N. ; Center for Advanced Accelerators, Korea Electrotechnology Research Institute, Changwon 641-120, Korea ; Hur, M.S. ; Suk, H.

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Energy exchange between pump and daughter waves during the stimulated Raman scattering process in a plasma is investigated, including the effect of a damping coefficient of electron-ion collision at different initial three-wave phases. To obey the energy and momentum conservations, the resonance conditions are satisfied at an optimal initial phase difference between the interacting waves. The amplitudes of the interacting waves exhibit behaviors such as a parametric oscillator. The variations in initial three-wave phase difference generate a phase mismatch, which enhances the rate of the amplitude variations of the interacting waves. The relativistic mass effect modifies the dispersion relations of the interacting waves, and consequently the energy exchange during the stimulated Raman scattering is affected. The collisional damping in the plasma is shown to have an important effect on the evolution of the interacting waves.

Published in:

Journal of Applied Physics  (Volume:100 ,  Issue: 10 )