Effects of relativistic electron temperature on parametric instabilities for intense laser propagation in underdense plasma

Zhao, Yao and Zheng, Jun and Chen, Min and Yu, Lu Le and Weng, Su Ming and Ren, Chuang and Liu, Chuan Sheng and Sheng, Zheng-Ming (2014) Effects of relativistic electron temperature on parametric instabilities for intense laser propagation in underdense plasma. Physics of Plasmas, 21 (11). 112114. ISSN 1070-664X

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    Abstract

    Effects of relativistic electron temperature on stimulated Raman scattering and stimulated Brillouin scattering instabilities for high intensity lasers propagating in underdense plasma are studied theoretically and numerically. The dispersion relations for these instabilities are derived from the relativistic fluid equation. For a wide range of laser intensity and electron temperature, it is found that the maximum growth rate and the instability region in k-space can be reduced at relativistic electron temperature. Particle-in-cell simulations are carried out, which confirm the theoretical analysis.