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High harmonic generation driven by twocolor relativistic circularly polarized laser pulses at various frequency ratios

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Plasma Science and Technology 2021年第4期23卷 63-69页

作者： Duan XIE Yan YIN Tongpu YU Hongyu ZHOU Ziyu CHEN hongbin zhuo School of Electronic Information and Electrical Engineering Changsha UniversityChangsha 410003People’s Republic of China Department of Physics National University of Defense TechnologyChangsha 410073People’s Republic of China College of Physics Sichuan UniversityChengdu 610064People’s Republic of China Center for Advanced Material Diagnostic Technology Shenzhen Technology UniversityShenzhen 518118People’s Republic of China

High harmonic generation(HHG)by two-color counter-rotating relativistic laser pulses with arbitrary frequency ratio is investigated through particle-in-cell *** is shown that the dichromatic laser driver at various frequency ratios can effectively produce high-order harmonics with different spectral features.A general selection rule of this extended scheme can be obtained and the corresponding harmonic helicity can be identified through a simple analytical model based on a relativistic oscillating ***,the results in this paper may offer new opportunities for arbitrary spectral control of generated harmonics,which is of significance for diverse potential applications in practice.

关键词： high-harmonic generation two-color laser pulses relativistic oscillating mirror

CBETor:a hybrid-kinetic particle-in-cell code for cross-beam energy transfer simulation

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Plasma Science and Technology 2022年第10期24卷 37-44页

作者： Jinlong JIAO Hezi WANG Hongyu ZHOU Yan YIN Bin QIAO hongbin zhuo Department of Physics National University of Defense TechnologyChangsha 410073People's Republic of China Zhejiang Institution of Modern Physics Department of PhysicsZhejiang UniversityHangzhou 310027People's Republic of China Center for Applied Physics and Technology HEDPSSKLNPTand School of PhysicsPeking UniversityBeijing 100871People's Republic of China Center for Advanced Material Diagnostic Technology Shenzhen Technology UniversityShenzhen 518118People's Republic of China

The parametric instability related to ion motion and the resulting cross-beam energy transfer are important aspects in the physics of inertial confinement *** numerical simulation of the above physical problems still faces great technical *** paper introduces a 2D hybrid-kinetic particle-in-cell(PIC)code,*** this code,the motion of ions is described by the kinetic method,the motion of electrons is described by the simplified fluid method and the propagation of laser in plasma is described by solving the wave *** use CBETor and the popular fully kinetic PIC code EPOCH to simulate the stimulated Brillouin scattering and cross-beam energy transfer process,*** physical images are in good agreement,but CBETor can significantly reduce the amount of *** the premise of correctly simulating the ion dynamics,our hybrid-kinetic code can effectively suppress the noise of numerical simulation and significantly expand the simulation scale of physical *** is very suitable for simulating the physical process dominated by ion motion in the interaction of medium intensity laser and underdense plasma.

关键词： cross-beam energy transfer hybrid-PIC simulation stimulated Brillouin scattering

Investigation of stimulated Raman scattering in longitudinal magnetized plasma by theory and kinetic simulation

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Plasma Science and Technology 2021年第11期23卷 26-34页

作者： Hongyu ZHOU Yan YIN Kaiqiang PAN Chengzhuo XIAO Jinlong JIAO Duan XIE Tongpu YU Fuqiu SHAO hongbin zhuo Department of Physics National University of Defense TechnologyChangsha 410073People's Republic of China Laser Fusion Research Center China Academy of Engineering PhysicsMianyang 621900People's Republic of China Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education&Hunan Province Key Laboratory of Low-Dimensional Structured Physics and Devices School of Physics and ElectronicsHunan UniversityChangsha 410082People's Republic of China Collaborative Innovation Center of IFSA(CICIFSA) Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China School of Physics Peking UniversityBeijing 100871People’s Republic of China School of Electronic Information and Electrical Engineering Changsha UniversityChangsha 410003People’s Republic of China Center for Advanced Material Diagnostic Technology Shenzhen Technology UniversityShenzhen 518118People’s Republic of China

Stimulated Raman scattering(SRS)in a longitudinal magnetized plasma is studied by theoretical analysis and kinetic *** linear growth rate derived via one-dimensional fluid theory shows the dependence on the plasma density,electron temperature,and magnetic field ***-dimensional particle-in-cell simulations are carried out to examine the kinetic evolution of SRS under low magnetic intensity of w_c/w_0<*** are two density regions distinguished in which the absolute growth of enveloped electrostatic waves and spectrum present quite different *** a relatively low-density plasma(ne~0.20 nc),the plasma wave presents typical absolute growth and the magnetic field alleviates linear *** in the plasma whose density is near the cut-off point(ne~0.23 nc),the magnetic field induces a spectral splitting of the backscattering and forward-scattering *** has been observed in simulations and verified by theoretical *** to this effect,the onset of reflectivity delays,and the plasma waves form high-frequency oscillation and periodic envelope *** split wavenumber Dk/k0 is proportional to the magnetic field intensity and plasma *** studies provide novel insight into the kinetic behavior of SRS in magnetized plasmas.

关键词： laser plasma interaction stimulated Raman scattering longitudinal magnetized plasma spectrum analysis electron plasma wave

Stimulated Raman scattering excited by incoherent light in plasma

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Matter and Radiation at Extremes 2017年第4期2卷 190-196页

作者： Yao Zhao Suming Weng Min Chen Jun Zheng hongbin zhuo Zhengming Sheng Key Laboratory for Laser Plasmas(MoE) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFSA(CICIFSA) Shanghai Jiao Tong UniversityShanghai 200240China College of Science National University of Defense TechnologyChangsha 410073China SUPA Department of PhysicsUniversity of StrathclydeGlasgow G40NGUK

Stimulated Raman scattering(SRS)excited by incoherent light is studied via particle-in-cell *** is shown that a large bandwidth of incoherent light can reduce the growth of SRS and electron heating considerably in the linear ***,different components of the incoherent light can be coupled by the Langmuir waves,so that stimulated Raman backward scattering can *** the bandwidth of incoherent light is larger than the Langmuir wave frequency,forward SRS can be seeded between different components of the incoherent *** incoherent light can only increase the time duration for nonlinear saturation but cannot diminish the saturation level obviously.

关键词： Stimulated Raman scattering Instability suppression Incoherent light Inertial confinement fusion

High-energy-density electron beam generation in ultra intense laser-plasma interaction

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Plasma Science and Technology 2017年第1期19卷 1-6页

作者： Jianxun LIU Yanyun MA Jun ZHAO Tongpu YU Fuqiu SHAO hongbin zhuo Longfei GAN Guobo ZHANG Yuan ZHAO Jingkang YANG1] College of Science National University of Defense Technology Changsha 410073 People's Republic of China College of Electronic Engineering Wuhan 430019 People's Republic of China IFSA-Collaborative Innovation Center Shanghai Jiao Tong University Shanghai 200240 People's Republic of China Laser Fusion Research Center China Academy of Engineering Physics Mianyang 621000 People's Republic of China

By using a two-dimensional particle-in-cell simulation,we demonstrate a scheme for highenergy-density electron beam generation by irradiating an ultra intense laser pulse onto an aluminum（Al） *** the laser having a peak intensity of 4×10^23W cm^-2,a high quality electron beam with a maximum density of 117 nc and a kinetic energy density up to8.79×10^18J m^-3 is *** temperature of the electron beam can be 416 Me V,and the beam divergence is only 7.25°.As the laser peak intensity increases（e.g.,1024 W cm^-2）,both the beam energy density（3.56×10^19J m^-3） and the temperature（545 Me V） are increased,and the beam collimation is well *** maximum density of the electron beam can even reach 180 *** beams should have potential applications in the areas of antiparticle generation,laboratory astrophysics,etc.

关键词： ultra intense laser plasma high-energy-density electron beam

超强激光驱动天线靶的太赫兹辐射物理特性研究

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光学学报 2015年第3期35卷 171-177页

作者：李星火卓红斌邹德滨国防科学技术大学理学院湖南长沙410073

利用激光与等离子体相互作用产生超强太赫兹辐射的研究成为国内外研究的热点。基于Smith提出的线形天线辐射理论,对超强超短激光脉冲驱动天线靶产生太赫兹的辐射特性进行研究,建立了完备的辐射空间分布和频谱空间分布表达式。利用激光... 详细信息

利用激光与等离子体相互作用产生超强太赫兹辐射的研究成为国内外研究的热点。基于Smith提出的线形天线辐射理论,对超强超短激光脉冲驱动天线靶产生太赫兹的辐射特性进行研究,建立了完备的辐射空间分布和频谱空间分布表达式。利用激光脉冲长度与天线长度的比值对辐射场分布的影响,讨论了固定天线长度时的最佳激光脉冲长度,以及固定激光条件时,天线长度对辐射场的频谱和空间分布的调制作用。理论分析结果表明,激光脉冲长度决定了辐射频率范围,激光脉冲长度与天线长度的比值决定了辐射场峰值的方向和频谱分布,为设计合理实验方案提供理论依据。

关键词：激光技术等离子体物理天线太赫兹辐射超强激光频谱

飞秒脉冲激光作用下电子振荡导致的辐射空间分布特性

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强激光与粒子束 2011年第5期23卷 1173-1176页

作者：徐涵田友伟卓红斌国防科学技术大学计算机学院长沙410073 中国工程物理研究院激光聚变研究中心四川绵阳621900 南京邮电大学理学院南京210046

采用单电子模型研究了不同偏振、不同强度飞秒脉冲激光作用下电子振荡导致的辐射的空间分布特性。研究发现:随着激光强度的增加,对圆偏振激光脉冲,电子辐射的空间分布由全空间分布变为前向双叶型结构,而对线偏振激光脉冲,电子辐射的空... 详细信息

采用单电子模型研究了不同偏振、不同强度飞秒脉冲激光作用下电子振荡导致的辐射的空间分布特性。研究发现:随着激光强度的增加,对圆偏振激光脉冲,电子辐射的空间分布由全空间分布变为前向双叶型结构,而对线偏振激光脉冲,电子辐射的空间分布由类似于偶极天线辐射特性的四重对称双叶结构变为双重对称三叶型结构,这可以为实验研究电子的辐射提供空间分布的相关依据。

关键词：空间分布电子振荡飞秒激光单电子模型

冷冻靶校准误差和烧蚀层粗糙度对氘氚层均匀性的影响

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强激光与粒子束 2009年第5期21卷 672-676页

作者：杨晓虎徐涵田成林银燕卓红斌国防科学技术大学理学院长沙410073 国防科学技术大学计算机学院长沙410073

理论分析了氘氚层外表面的温差与其粗糙度间的关系;以法国兆焦激光装置LMJ为原型,利用计算流体力学程序Fluent,分别模拟了靶丸轴向偏离黑腔中心不同尺度和烧蚀层存在不同大小的非均匀厚度对氘氚层温度分布的影响,求得了这两种误差引起... 详细信息

理论分析了氘氚层外表面的温差与其粗糙度间的关系;以法国兆焦激光装置LMJ为原型,利用计算流体力学程序Fluent,分别模拟了靶丸轴向偏离黑腔中心不同尺度和烧蚀层存在不同大小的非均匀厚度对氘氚层温度分布的影响,求得了这两种误差引起氘氚层厚度的非均匀度。结果表明:为了满足点火靶的要求,靶丸轴向偏离腔体中心的尺度须在8.5μm内,烧蚀层轴向粗糙度则应控制在0.72μm内。

关键词：惯性约束聚变间接驱动靶冷冻靶氘氚层粗糙度均匀性轴向偏离

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对流传热对冷冻靶温度影响的数值分析

强激光与粒子束 2009年第3期21卷 355-358页

作者：杨晓虎徐涵田成林银燕卓红斌国防科学技术大学理学院长沙410073 国防科学技术大学计算机学院长沙410073

利用计算流体力学的程序Fluent,以法国的兆焦激光装置LMJ为原型,研究了惯性约束聚变间接驱动靶中黑腔内填充气体的自然对流传热效应对靶丸温度分布的影响;通过在黑腔内加入聚合薄膜,减小靶表面的温度不均匀性,得到了最佳腔体分隔模式;... 详细信息

利用计算流体力学的程序Fluent,以法国的兆焦激光装置LMJ为原型,研究了惯性约束聚变间接驱动靶中黑腔内填充气体的自然对流传热效应对靶丸温度分布的影响;通过在黑腔内加入聚合薄膜,减小靶表面的温度不均匀性,得到了最佳腔体分隔模式;并在分隔成7个分区的腔体中,结合调整黑腔壁上下冷却环的温度,当两冷却环之间存在±0.5mK的温差时,使得靶丸表面的温度均匀性最终能够满足聚变的要求。

关键词：冷冻靶间接驱动自然对流分隔模式