Suppression of stimulated Raman scattering in plasma by an ultra-wideband stochastic phase low-coherence laser

被引：1

作者：

Yi, S. Y. ^{[1
]}

Zhou, H. Y. ^{[1
]}

Jiao, J. L. ^{[2
]}

Wang, H. Z. ^{[1
]}

Yan, R. ^{[1
]}

Zhang, P. D. ^{[1
]}

Yin, Y. ^{[1
]}

机构：

[1] Natl Univ Def Technol, Dept Phys, Changsha 410073, Peoples R China

[2] Zhejiang Univ, Zhejiang Inst Modern Phys, Sch Phys, Hangzhou 310027, Peoples R China

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2023年 / 65卷 / 06期

基金：

中国国家自然科学基金;

关键词：

inertial confinement fusion; stimulated Raman scattering; stochastic phase low-coherence laser; PHYSICS BASIS; POLARIZATION; INSTABILITIES; GENERATION; BACKWARD; IGNITION; LIGHT;

D O I：

10.1088/1361-6587/acc8fd

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Suppression of the stimulated Raman scattering (SRS) by a stochastic phase low-coherence laser (SPLL) in homogeneous plasma is investigated by theoretical analysis and one-dimensional particle-in-cell (PIC) simulation. A simple model is established, in which the SPLL is modelled as a combination of a monochromatic laser and a broadband laser. When the phase randomness increases, the bandwidth of the SPLL is broadened and the energy proportion of the monochromatic laser component is reduced. PIC simulation shows that the SPLL can effectively suppress SRS and hot electron generation. Various phenomena in the nonlinear process, such as the nonlinear frequency shift and the competition between forward-scattering and back-scattering modes, are explained in detail.

引用

页数：9

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