Simulation of stimulated Brillouin scattering and stimulated Raman scattering in shock ignition

Hao, Liang; Li, J.; Liu, W. D.; Yan, Rui; Ren, C.

doi:10.1063/1.4945647

Cited by 22 publications

(35 citation statements)

References 24 publications

(51 reference statements)

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“…Although the results are presented by a 1D simulation, the burst phenomenon shown in this paper will occur in real experiments. Through the particle-in-cell (PIC) simulation code OSIRIS [39] and the fluid simulation code HLIP [40] , the analogous burst behavior can also occur when an inhomogeneous plasma density and an inhomogeneous plasma flow are considered [41] .…”

Section: Discussionmentioning

confidence: 99%

Burst behavior due to the quasimode excited by stimulated Brillouin scattering in high-intensity laser–plasma interactions

Feng

Cao

Liu

et al. 2019

High Pow Laser Sci Eng

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The strong-coupling mode, called "quasimode", will be excited by stimulated Brillouin scattering (SBS) in high-intensity laser-plasma interaction. And SBS of quasimode will compete with SBS of fast mode (or slow mode) in multi-ion species plasmas, thus leading to a low-frequency burst behavior of SBS reflectivity. The competition of quasimode and ion-acoustic wave (IAW) is an important saturation mechanism of SBS in high-intensity laser-plasma interaction. These results give a clear explanation to the low-frequency periodic burst behavior of SBS and should be considered as a saturation mechanism of SBS in high-intensity laser-plasma interaction.

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Section: Discussionmentioning

confidence: 99%

Burst behavior due to the quasimode excited by stimulated Brillouin scattering in high-intensity laser–plasma interactions

Feng

Cao

Liu

et al. 2019

High Pow Laser Sci Eng

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“…目前最被广泛应用的时间域匀滑技术是光谱色散匀滑(Smoothing by Spectral Dispersion, SSD) [45] , 它是 [53] , 这是因为离子热速度为v [2,[54][55][56][57] . 泵波衰竭是物理图像最简洁直观的LPI饱和机制 [16,58,59] . [72][73][74][75][76] .…”

Section: 激光电场一般可以定义为如下形式unclassified

Laser plasma instability in indirect-drive inertial confinement fusion

Yang¹,

Li²,

Li³

et al. 2018

Sci. Sin.-Phys. Mech. Astron.

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In indirect-drive inertial confinement fusion (ICF), the incident laser beam could excite laser plasma instabilities (LPI) such as stimulated Brillouin scattering (SBS), stimulated Raman scattering (SRS) and two plasmon decay (TPD) besides gently heat the hohlraum through collisional absorption. These instabilities would largely reduce the X-ray conversion and degrade the drive symmetry of the radiation environment. In addition, when the amplitude of parametric instability increases to a certain level, there would be interplay between different instabilities, which makes LPI complicated and unpredictable. Therefore, LPI has become one of the major challenge in achieving ignition. LPI research during recent few years made great strides in identifying, understanding, and controlling instabilities in the context of laser fusion. This paper reviews the progress in this important field according to laser (L), plasma (P), and instability (I). Prospects for the application of our improved understanding for indirect drive ICF and some exciting research opportunities are also discussed.

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“…In recent particle-in-cell (PIC) simulations of LPI in a new ignition scheme, shock ignition [2], convective and absolute modes were found both important. Laser reflectivity was found largely due to convective stimulated Brillouin scattering (SBS) below the quartercritical surface [3][4][5][6]. Hot electrons were generated by absolute two plasmon decay (TPD) and stimulated Raman scattering (SRS) modes near the quarter-critical surface [3][4][5]7].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Fluid Simulation Study of Stimulated Raman and Brillouin Scatterings in Shock Ignition

Hao,

Yan,

et al. 2017

Preprint

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We developed a new nonlinear fluid laser-plasma-instability code (FLAME) using a multi-fluid plasma model combined with full electromagnetic wave equations. The completed one-dimensional (1D) version of FLAME was used to study laser-plasma instabilities in shock ignition. The simulations results showed that absolute SRS modes growing near the quarter-critical surface were saturated by Langmuir-wave Decay Instabilities (LDI) and pump depletion. The ion-acoustic waves from LDI acted as seeds of Stimulated Brillouin Scattering (SBS), which displayed a bursting pattern and caused strong pump depletion. Re-scattering of SRS at the 1/16th-critical surface was also observed in a high temperature case. These results largely agreed with corresponding Particle-in-Cell simulations.

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Simulation of stimulated Brillouin scattering and stimulated Raman scattering in shock ignition

Cited by 22 publications

References 24 publications

Burst behavior due to the quasimode excited by stimulated Brillouin scattering in high-intensity laser–plasma interactions

Burst behavior due to the quasimode excited by stimulated Brillouin scattering in high-intensity laser–plasma interactions

Laser plasma instability in indirect-drive inertial confinement fusion

Nonlinear Fluid Simulation Study of Stimulated Raman and Brillouin Scatterings in Shock Ignition

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