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Stimulated Brillouin scattering enhanced by the stimulated Raman process near the quarter-critical density

Z J Liu, Q Wang, B Li, J W Li, L H Cao, C Y Zheng, X T He2022年Plasma Physics and Controlled FusionIF 2.2出版社

Stimulated Raman scattering can occur near the quarter critical density in direct-drive fusions, and the frequency of Raman-scattered light is about half of the incident light frequency. The second harmonic of the Raman-scattered light can be produced due to the inhomogeneity density profile. It can serve as the seed of stimulated Brillouin scattering (SBS). When the second harmonic of stimulated Raman-scattered light propagates against the incident light, some components will match the frequency of backward SBS, and SBS is induced. Thus, SBS could be greatly enhanced.

日本語訳

直接駆動核融合における臨界密度の約4分の1付近で誘導ラマン散乱が発生し得る。ラマン散乱光の周波数は入射光周波数の約半分である。密度分布の不均一性により、ラマン散乱光の第2高調波が生成され得る。この第2高調波は誘導ブリルアン散乱(SBS)の種光となり得る。誘導ラマン散乱光の第2高調波が入射光と逆方向に伝播する際、その一部の成分は後方誘導ブリルアン散乱の周波数と一致し、SBSが誘起される。これにより、SBSは大幅に増強され得る。

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Raman scatteringStimulated Raman scatteringStimulated Brillouin scatteringBrillouin scattering
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