Stimulated Raman scattering excited by incoherent light in plasma

Matter and Radiation at Extremes - Tập 2 - Trang 190-196 - 2017
Yao Zhao1,2, Suming Weng1,2, Min Chen1,2, Jun Zheng1,2, Hongbin Zhuo3,2, Zhengming Sheng1,2,4
1Key Laboratory for Laser Plasmas (MoE), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
2Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China
3College of Science, National University of Defense Technology, Changsha 410073, China
4SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK

Tóm tắt

Stimulated Raman scattering (SRS) excited by incoherent light is studied via particle-in-cell simulations. It is shown that a large bandwidth of incoherent light can reduce the growth of SRS and electron heating considerably in the linear stage. However, different components of the incoherent light can be coupled by the Langmuir waves, so that stimulated Raman backward scattering can develop. When the bandwidth of incoherent light is larger than the Langmuir wave frequency, forward SRS can be seeded between different components of the incoherent light. The incoherent light can only increase the time duration for nonlinear saturation but cannot diminish the saturation level obviously.

Tài liệu tham khảo

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