NDLI: Absolute instability modes due to rescattering of stimulated Raman scattering in a large nonuniform plasma

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Absolute instability modes due to rescattering of stimulated Raman scattering in a large nonuniform plasma

Content Provider	Scilit
Author	Zhao, Yao Sheng, Zhengming Weng, Suming Ji, Shengzhe Zhu, Jianqiang
Copyright Year	2019
Description	Absolute instability modes due to secondary scattering of stimulated Raman scattering (SRS) in a large nonuniform plasma are studied theoretically and numerically. The backscattered light of convective SRS can be considered as a pump light with a finite bandwidth. The different frequency components of the backscattered light can be coupled to develop absolute SRS instability near their quarter-critical densities via rescattering process. The absolute SRS mode develops a Langmuir wave with a high phase velocity of about $c/\sqrt{3}$ with $c$ the light speed in vacuum. Given that most electrons are at low velocities in the linear stage, the absolute SRS mode grows with very weak Landau damping. When the interaction evolves into the nonlinear regime, the Langmuir wave can heat abundant electrons up to a few hundred keV via the SRS rescattering. Our theoretical model is validated by particle-in-cell simulations. The absolute instabilities may play a considerable role in the experiments of inertial confinement fusion.
Related Links	https://www.cambridge.org/core/services/aop-cambridge-core/content/view/2CD973220BCA23B1AA9551E6ACA0962B/S2095471919000057a.pdf/div-class-title-absolute-instability-modes-due-to-rescattering-of-stimulated-raman-scattering-in-a-large-nonuniform-plasma-div.pdf
ISSN	20954719
e-ISSN	20523289
DOI	10.1017/hpl.2019.5
Journal	High Power Laser Science and Engineering
Volume Number	7
Language	English
Publisher	Cambridge University Press (CUP)
Publisher Date	2019-01-01
Access Restriction	Open
Subject Keyword	High Power Laser Science and Engineering Laser Plasma Interactions Stimulated Raman Scattering Two Plasmon Decay Instability Hot Electron
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Atomic and Molecular Physics, and Optics Electronic, Optical and Magnetic Materials Nuclear Energy and Engineering

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