Suppressing stimulated Raman side-scattering with vector light

Jia Xiaobao; Jia Qing; Yan Rui; Zheng Jian

doi:10.1063/5.0157811

Volume 8 Issue 5

Sep. 2023

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Jia Xiaobao, Jia Qing, Yan Rui, Zheng Jian. Suppressing stimulated Raman side-scattering with vector light[J]. Matter and Radiation at Extremes, 2023, 8(5): 055603. doi: 10.1063/5.0157811

Citation:

Jia Xiaobao, Jia Qing, Yan Rui, Zheng Jian. Suppressing stimulated Raman side-scattering with vector light[J]. Matter and Radiation at Extremes, 2023, 8(5): 055603. doi: 10.1063/5.0157811

Jia Xiaobao, Jia Qing, Yan Rui, Zheng Jian. Suppressing stimulated Raman side-scattering with vector light[J]. Matter and Radiation at Extremes, 2023, 8(5): 055603. doi: 10.1063/5.0157811

Citation:

Jia Xiaobao, Jia Qing, Yan Rui, Zheng Jian. Suppressing stimulated Raman side-scattering with vector light[J]. Matter and Radiation at Extremes, 2023, 8(5): 055603. doi: 10.1063/5.0157811

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Suppressing stimulated Raman side-scattering with vector light

doi: 10.1063/5.0157811

Jia Xiaobao^{1
,
,},
Jia Qing^{1
,
,},
Yan Rui^{2, 3
,},
Zheng Jian^{1, 3
,
,
,}

1.
Department of Plasma Physics and Fusion Engineering and CAS Key Laboratory of Geospace Environment, University of Science and Technology of China, Hefei, Anhui 230026, China
2.
Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China
3.
Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China

More Information

Corresponding author: a)Authors to whom correspondence should be addressed: qjia@ustc.edu.cn and jzheng@ustc.edu.cn
Received Date: 2023-05-11
Accepted Date: 2023-07-24

Available Online: 2023-09-01

Publish Date: 2023-09-01

Abstract

Abstract

Recent observations of stimulated Raman side-scattering (SRSS) in different laser inertial confinement fusion ignition schemes have revealed that there is an underlying risk of SRSS on ignition. In this paper, we propose a method that uses the nonuniform nature of the polarization of vector light to suppress SRSS, and we give an additional threshold condition determined by the parameters of the vector light. For SRSS at 90°, where the scattered electromagnetic wave travels perpendicular to the density profile, the variation in polarization of the pump will change the wave vector of the scattered light, thereby reducing the growth length and preventing the scattered electromagnetic wave from growing. This suppression scheme is verified through three-dimensional particle-in-cell simulations. Our illustrative simulation results demonstrate that for linearly polarized Gaussian light, there is a strong SRSS signal in the 90° direction, whereas for vector light, there is very little SRSS signal, even when the conditions significantly exceed the threshold for SRSS. We also discuss the impact of vector light on stimulated Raman backscattering, collective stimulated Brillouin scattering and two-plasmon decay.

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References

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