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Growth rate and gain of stimulated Brillouin scattering considering nonlinear Landau damping due to particle trapping

Q S Feng, L H Cao, Z J Liu, L Hao, C Y Zheng, C Ning, X T He2020年Plasma Physics and Controlled FusionIF 2.2出版社

Growth rate and gain of stimulated Brillouin scattering (SBS) considering the reduced Landau damping due to particle trapping has been proposed to predict the growth and average level of SBS reflectivity. Due to particle trapping, the reduced Landau damping has been taken used of to calculate the gain of SBS, which will make the simulation data of SBS average reflectivity be consistent to the Tang model better. Other nonlinear effects such as harmonic generation and pump depletion have been also considered in the later evolution of SBS. This work may solve the pending questions in laser-plasma interaction and have wide applications in parametric instabilities.

日本語訳

捕捉された粒子によるランダウ減衰の低減を考慮した誘導ブリルアン散乱(SBS)の成長率と利得が、SBS反射率の成長と平均レベルを予測するために提案されている。粒子捕捉により、低減されたランダウ減衰をSBSの利得計算に利用することで、SBS平均反射率のシミュレーションデータがTangモデルにより良く一致するようになる。高調波発生やポンプ消耗などの他の非線形効果も、SBSのその後の発展において考慮されている。この研究は、レーザー・プラズマ相互作用における未解決の問題を解決し、パラメトリック不安定性において広範な応用が期待される。

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Landau dampingStimulated Brillouin scatteringBrillouin scattering
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