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Filaments in high-speed counter-streaming plasma interactions driven by high-power laser pulses

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Science China(Physics,Mechanics & Astronomy) 2013年第12期56卷 2381-2385页

作者： YUAN DaWei LI YuTong SU LuNing liao guoqian YIN ChuanLei ZHU BaoJun ZHANG Jie Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences

Interactions of two counter-streaming plasmas driven by high power laser pulses are studied on Shenguang II laser *** structures were observed in the interaction region after the electrostatic shockwave *** analysis and observations indicate that the filaments are because of collisionless mechanisms,which are caused by the electromagnetic instability,such as the beam-Weibel *** experiments were also carried out for comparison and no filaments were generated.

关键词： laser-produced plasmas coilisionless shock waves Weibel instability

High-power terahertz bursts generated from relativistic laser-plasma interactions

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High-power terahertz bursts generated from relativistic lase...

High-power terahertz bursts generated from relativistic laser-plasma interactions

第十三届全国光学前沿问题讨论会

作者： liao guoqian Central Laser Facility STFC Rutherford Appleton Laboratory

＜正＞An ever-increasing number of strong-field applications like ultrafast coherent control over matter require high-power and tunable driver light *** realization of such a source in the terahertz（THz） band has long been a formidable *** combination of the already available ultra-intense lasers and damage-free plasma medium makes laserplasma interactions be a promising approach toward producing strong THz *** this talk,our studies on the THz generation from relativistically intense laser-produced plasmas will be *** the recent experiment where an ultraintense picosecond laser pulse irradiates a metal foil,the efficient generation of spectrally-tunable THz pulses with energies up to tens of millijoules has been demonstrated.

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量子电子学报 2020年第1期 119-119页

作者： liao guoqian Central Laser Facility STFC Rutherford Appleton Laboratory

An ever-increasing number of strong-field applications like ultrafast coherent control over matter require high-power and tunable driver light *** realization of such a source in the terahertz (THz) band has long been a formidable *** combination of the already available ultra-intense lasers and damage-free plasma medium makes laser-

关键词： THz High-power terahertz bursts generated from relativistic laser-plasma interactions

Terahertz radiation generation based on interaction of intense laser and plasma

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Terahertz radiation generation based on interaction of inten...

Laser-driven plasma collider for nuclear studies

第十一届全国光学前沿问题讨论会

作者： LI Yutong liao guoqian LI Chun WANG Weimin SHENG Zhengming Institute of Physics Chinese Academy of Sciences Key Laboratory for Laser Plasmas(MoE) and Department of Physics Shanghai Jiaotong University

Recently terahertz radiation from laser-produced plasmas has attracted much interest since plasmas can work at arbitrarily high laser ***,only few experiments with relativistic laser pulses are *** THz generation is e...

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Science Bulletin 2015年第13期60卷 1211-1213页

作者： Changbo Fu Jie Bao Liming Chen Jianjun He Long Hou Liang Li Yanfei Li Yutong Li guoqian liao Yongjoo Rhee Yang Sun Shiwei Xu Dawei Yuan Xiaopeng Zhang Gang Zhao Jiarui Zhao Baojun Zhu Jianqiang Zhu Jie Zhang Department of Physics and Astronomy Shanghai Jiao Tong University Physics Department China Institute of Atomic Energy Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences IFSA Collaborative Innovation Center Shanghai Jiao Tong University Institute of Modern Physics Chinese Academy of Sciences Nuclear Data Center Korea Atomic Energy Research Institute National Astronomical Observatories Chinese Academy of Sciences Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences

A novel method of initiating nuclear fusion reactions in a full plasma environment was suggested, and a proof-of-concept experiment was carried out with the D ＋D → n＋3He reaction. In this new approach, two plasma jets generated by high-intensity lasers collide headon-head. The center-of-mass energy of the nuclei increases accordingly, and therefore, reaction products can be significantly enhanced, especially in the sub-Coulomb barrier ranges. As a result of the fusion reaction, up to - 7.6 ×105 neutrons had been observed. This new type of ＂plasma collider＂ could provide an innovative tool to study nuclear reactions under astrophysical conditions.

关键词： Plasma collider - D-D neutron .Laboratory nuclear astrophysics - High-intensity laser

Proton radiography of magnetic fields generated with an open-ended coil driven by high power laser pulses

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Matter and Radiation at Extremes 2016年第4期1卷 187-191页

作者： guoqian liao Yutong Li Baojun Zhu Yanfei Li Fang Li Mengchao Li Xuan Wang Zhe Zhang Shukai He Weiwu Wang Feng Lu Faqiang Zhang Lei Yang Kainan Zhou Na Xie Wei Hong Yuqiu Gu Zongqing Zhao Baohan Zhang Jie Zhang National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Science and Technology on Plasma Physics Laboratory Laser Fusion Research CenterChina Academy of Engineering Physics(CAEP)Mianyang 621900China Key Laboratory for Laser Plasmas(MoE)and Department of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFSA(CICIFSA) Shanghai Jiao Tong UniversityShanghai 200240China

Recently generation of strong magnetic(B)fields has been demonstrated in capacitor coils heated by high power laser pulses[*** et al.,***.3,1170(2013)].This paper will present a direct measurement of B field generated with an open-ended coil target driven by a nanosecond laser pulse using ultrafast proton *** radiographs are analyzed with particle-tracing *** B field at the coil center is inferred to be ~50 T at an irradiance of ~5×10^(14) W·cm^(-2).The B field generation is attributed to the background cold electron flow pointing to the laser focal spot,where a target potential is induced due to the escape of energetic electrons.

关键词： Strong magnetic field Laser-driven coil targets Proton radiography

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强场太赫兹脉冲波形和频谱的单发测量技术

中国激光 2023年第17期50卷 3-12,F0002页

作者：雷弘毅孙方正陈浩卫妍玉张保龙廖国前李玉同中国科学院物理研究所北京凝聚态物理国家研究中心北京100190 中国科学院大学物理科学学院北京100049 松山湖材料实验室广东东莞523808 上海交通大学IFSA协同创新中心上海200240

基于超快超强激光的强场太赫兹辐射源通常具有较低的重复频率,此类辐射源的表征和应用对太赫兹时域波形和频谱测量技术提出了新要求。介绍了中国科学院物理研究所光物理重点实验室发展的几种针对太赫兹脉冲时域波形和频谱的单发测量系统... 详细信息

基于超快超强激光的强场太赫兹辐射源通常具有较低的重复频率,此类辐射源的表征和应用对太赫兹时域波形和频谱测量技术提出了新要求。介绍了中国科学院物理研究所光物理重点实验室发展的几种针对太赫兹脉冲时域波形和频谱的单发测量系统,重点讨论了每种方案的设计原理和特点。这些单发探测方案适用于低重复频率的强场太赫兹脉冲源,有助于准确表征太赫兹辐射性质、深入理解太赫兹产生机制、拓展强场太赫兹应用范围。

关键词：测量太赫兹辐射电光采样自相关测量

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基于激光等离子体的太赫兹脉冲驱动电子偏转

中国科学：物理学、力学、天文学 2021年第5期51卷 71-78页

作者：王丹刘浩王为武王天泽雷弘毅刘东晓杨雷卢峰周凯南周维民谷渝秋廖国前张喆王瑄李玉同中国科学院物理研究所北京凝聚态物理国家研究中心北京100190 中国科学院大学物理科学学院北京100049 上海交通大学物理与天文学院激光等离子体教育部重点实验室上海200240 中国工程物理研究院激光聚变研究中心等离子体物理重点实验室绵阳621900 松山湖材料实验室东莞523808 上海交通大学IFSA协同创新中心上海200240

传统电子加速装置以射频场作为驱动场.相比之下,太赫兹辐射波长更短,加速梯度更高,是未来紧凑型电子加速装置的一种潜在驱动场.此外,太赫兹脉冲可以提供一个超快调制场用于压缩和测量电子脉宽.近年来,太赫兹场与电子的相互作用引起了广... 详细信息

传统电子加速装置以射频场作为驱动场.相比之下,太赫兹辐射波长更短,加速梯度更高,是未来紧凑型电子加速装置的一种潜在驱动场.此外,太赫兹脉冲可以提供一个超快调制场用于压缩和测量电子脉宽.近年来,太赫兹场与电子的相互作用引起了广泛关注.强激光与等离子体相互作用可同时产生大能量的太赫兹脉冲和大电量的超短电子束,这一优势使其有望成为太赫兹场调控电子、太赫兹泵浦-电子探测的新型独特平台.本文以一种可行的实验布局为例,研究了激光等离子体产生的太赫兹脉冲对同向传播电子束的偏转作用.通过计算模拟,系统讨论了各参数对太赫兹场引起的电子偏转的影响,发现太赫兹电场强度或脉宽增加会使偏转现象更为显著,另外,偏转现象与太赫兹波形有关.初步的演示性实验定性验证了数值分析结果.

关键词：激光-等离子体相互作用太赫兹辐射电子偏转

595 nm脉冲染料激光治疗婴幼儿不同部位浅表性血管瘤的效果分析

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中华整形外科杂志 2021年第12期37卷 1320-1327页

作者：陆思锭申文娟廖明德廖佳覃朝李春燕殷国前广西医科大学附属第一医院整形美容外科南宁530021

目的探讨595 nm脉冲染料激光治疗婴幼儿不同部位浅表性血管瘤的临床效果。方法回顾性分析广西医科大学附属第一医院2018年1月至2020年1月门诊采用595 nm脉冲染料激光治疗的婴幼儿(≤3岁)浅表部位血管瘤临床资料。按治疗部位进行分组,分... 详细信息

目的探讨595 nm脉冲染料激光治疗婴幼儿不同部位浅表性血管瘤的临床效果。方法回顾性分析广西医科大学附属第一医院2018年1月至2020年1月门诊采用595 nm脉冲染料激光治疗的婴幼儿(≤3岁)浅表部位血管瘤临床资料。按治疗部位进行分组,分析各部位的激光治疗能量、治疗次数、临床效果及不良反应的差异。根据数据性质,分别采用t检验、SNK-q检验及卡方检验进行统计学分析。结果共纳入437例患儿,男168例,女269例,0~36个月龄。按部位将其分为头皮(34例)、额部(37例)、面颊(61例)、眼周(30例)、鼻部(21例)、唇部(12例)、口周(10例)、耳部(16例)、颈部(26例)、胸部(36例)、腹部(24例)、背部(21例)、臀部(12例)、会阴(14例)、上臂及前臂(30例)、手部(25例)、腿部(18例)、足部(10例)。各部位治疗平均能量均在8.0 J/cm2左右,差异无统计学意义(P>0.05);对于治疗次数,头皮、额部、面颊、眼周、鼻部、唇部、口周、足部较其他部位的治疗次数更多,差异均有统计学意义(P<0.05),其中鼻部及口周浅表血管瘤的治疗次数最多;治疗总体有效率达96.57%(422/437);共发生35例不良反应,发生率为8.01%,其中出现色素脱落或减退22例,色素沉着5例,萎缩性瘢痕8例。结论595 nm脉冲染料激光对于婴幼儿浅表性血管瘤总体治疗效果良好,且不良反应较轻,但不同部位的浅表型血管瘤其所需治疗次数存在差别。

关键词：激光,染料血管瘤身体部位婴幼儿治疗结果